Abstract

The frequency ratio of the 1S0(F = 1/2)-3P0(F = 1/2) clock transition in 171Yb and the 1S0(F = 9/2)-3P0(F = 9/2) clock transition in 87Sr is measured by an optical-optical direct frequency link between two optical lattice clocks. We determined the ratio (νYb/νSr) to be 1.207 507 039 343 340 4(18) with a fractional standard uncertainty of 1.5 × 10−15. The measurement uncertainty of the frequency ratio is smaller than that obtained from absolute frequency measurements using the International Atomic Time (TAI) link. The measured ratio agrees well with that derived from the absolute frequency measurement results obtained at NIST and JILA, Boulder, CO using their Cs-fountain clock. Our measurement enables the first international comparison of the frequency ratios of optical clocks. The measured frequency ratio will be reported to the International Committee for Weights and Measures for a discussion related to the redefinition of the second.

© 2014 Optical Society of America

Full Article  |  PDF Article

Corrections

Daisuke Akamatsu, Masami Yasuda, Hajime Inaba, Kazumoto Hosaka, Takehiko Tanabe, Atsushi Onae, and Feng-Lei Hong, "Errata: Frequency ratio measurement of 171Yb and 87Sr optical lattice clocks," Opt. Express 22, 32199-32199 (2014)
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-26-32199

References

  • View by:
  • |
  • |
  • |

  1. C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
    [CrossRef] [PubMed]
  2. N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
    [CrossRef] [PubMed]
  3. B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
    [CrossRef] [PubMed]
  4. C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
    [CrossRef] [PubMed]
  5. M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
    [CrossRef] [PubMed]
  6. G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
    [CrossRef]
  7. R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
    [PubMed]
  8. F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
    [CrossRef] [PubMed]
  9. S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
    [CrossRef]
  10. A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
    [CrossRef]
  11. D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
    [CrossRef]
  12. M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
    [CrossRef]
  13. N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
    [CrossRef] [PubMed]
  14. C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
    [CrossRef]
  15. S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
    [CrossRef] [PubMed]
  16. T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
    [CrossRef] [PubMed]
  17. K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
    [CrossRef] [PubMed]
  18. H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
    [CrossRef] [PubMed]
  19. M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
    [CrossRef]
  20. Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
    [CrossRef] [PubMed]
  21. K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
    [CrossRef] [PubMed]
  22. D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
    [CrossRef] [PubMed]
  23. F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
    [CrossRef] [PubMed]
  24. D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
    [CrossRef] [PubMed]
  25. M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
    [CrossRef]

2014 (2)

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

2013 (4)

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

2012 (5)

2011 (3)

M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
[CrossRef]

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

2010 (4)

2009 (3)

2008 (3)

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

2005 (1)

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

Abgrall, M.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Akamatsu, D.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

Amemiya, M.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
[CrossRef] [PubMed]

Baillard, X.

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Barber, Z. W.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

Beloy, K.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Bergquist, J. C.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Bishof, M.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Bize, S.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Blatt, S.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Bloom, B. J.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Boyd, M. M.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Bromley, S. L.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Brusch, A.

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Campbell, G. K.

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Campbell, S. L.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Cho, J. W.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Chou, C. W.

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Clairon, A.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

de Miranda, M. H. G.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Diddams, S. A.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Drullinger, R. E.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Falke, S.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Flambaum, V. V.

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Fortier, T. M.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Fouché, M.

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Fujii, Y.

Gartman, R.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Grosche, G.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Guéna, J.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Gurov, M.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Hachisu, H.

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
[CrossRef] [PubMed]

Hayasaka, K.

Heavner, T. P.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Higashi, R.

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

Hinkley, N.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Hong, F.-L.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
[CrossRef] [PubMed]

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

Hosaka, K.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

Hosokawa, M.

Hume, D. B.

C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Ido, T.

K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
[CrossRef] [PubMed]

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Ikegami, T.

Imae, M.

Inaba, H.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
[CrossRef] [PubMed]

Ishijima, H.

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Itano, W. M.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Iwakuni, K.

Jefferts, S. R.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Jiang, Y.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

Kajita, M.

Katori, H.

M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
[CrossRef]

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
[CrossRef] [PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

Katsuyama, T.

Kawato, S.

Kim, E. B.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Kobayashi, T.

Koelemeij, J. C. J.

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

Kohno, T.

Kumagai, M.

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Kwon, T. Y.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Laurent, P.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Le Coq, Y.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Le Targat, R.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Lee, S. K.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Lee, S.-B.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Lee, W.-K.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Lemke, N. D.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

Lemonde, P.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Li, Y.

K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
[CrossRef] [PubMed]

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Lipphardt, B.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Lisdat, C.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Locke, C.

Lodewyck, J.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Lorini, L.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Lours, M.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Ludlow, A. D.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Martin, M. J.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Matsubara, K.

Middelmann, T.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Minoshima, K.

Mun, J.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Musha, M.

Nagano, S.

K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
[CrossRef] [PubMed]

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Nagórny, B.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Nakagawa, K.

Nakajima, Y.

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

Newbury, N. R.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Nicholson, T. L.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Nogami, A.

Oates, C. W.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

Okubo, S.

Onae, A.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

Oskay, W. H.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Park, C. Y.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Park, S. E.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Park, S. J.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Parker, T. E.

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

Phillips, N. B.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Pizzocaro, M.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Riehle, F.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Rosenband, T.

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Rosenbusch, P.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Rovera, D. G.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Santarelli, G.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Schioppo, M.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Schmidt, P. O.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Schnatz, H.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Sherman, J. A.

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

Shiga, N.

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Stalnaker, J. E.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Sterr, U.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Suzuyama, T.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

Swann, W. C.

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Takamizawa, A.

Takamoto, M.

M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
[CrossRef]

F.-L. Hong, M. Musha, M. Takamoto, H. Inaba, S. Yanagimachi, A. Takamizawa, K. Watabe, T. Ikegami, M. Imae, Y. Fujii, M. Amemiya, K. Nakagawa, K. Ueda, H. Katori, “Measuring the frequency of a Sr optical lattice clock using a 120 km coherent optical transfer,” Opt. Lett. 34(5), 692–694 (2009).
[CrossRef] [PubMed]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

Takano, T.

M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
[CrossRef]

Tanabe, T.

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

Thomsen, J. W.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Tobar, M. E.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Ueda, K.

Vogt, S.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Watabe, K.

Westergaard, P. G.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Weyers, S.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Williams, J. R.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Wineland, D. J.

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Winfred, J. S. R. V.

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Yamaguchi, A.

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

Yanagimachi, S.

Yasuda, M.

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

M. Yasuda, T. Kohno, H. Inaba, Y. Nakajima, K. Hosaka, A. Onae, F.-L. Hong, “Fiber-comb-stabilized light source at 556 nm for magneto-optical trapping of ytterbium,” J. Opt. Soc. Am. B 27(7), 1388–1393 (2010).
[CrossRef]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

Ye, J.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Yoon, T. H.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Yu, D.-H.

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

Zawada, M.

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Zelevinsky, T.

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

Zhang, W.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Zhang, X.

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Appl. Phys. Express (3)

A. Yamaguchi, N. Shiga, S. Nagano, Y. Li, H. Ishijima, H. Hachisu, M. Kumagai, T. Ido, “Stability transfer between two clock lasers operating at different wavelengths for absolute frequency measurement of clock transition in 87Sr,” Appl. Phys. Express 5(2), 022701 (2012).
[CrossRef]

D. Akamatsu, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Spectroscopy and frequency measurement of the 87Sr clock transition by laser linewidth transfer using an optical frequency comb,” Appl. Phys. Express 7(1), 012401 (2014).
[CrossRef]

M. Yasuda, H. Inaba, T. Kohno, T. Tanabe, Y. Nakajima, K. Hosaka, D. Akamatsu, A. Onae, T. Suzuyama, M. Amemiya, F.-L. Hong, “Improved absolute frequency measurement of the 171Yb optical lattice clock towards a candidate for the redefinition of the second,” Appl. Phys. Express 5(10), 102401 (2012).
[CrossRef]

J. Opt. Soc. Am. B (1)

Metrologia (3)

C. Y. Park, D.-H. Yu, W.-K. Lee, S. E. Park, E. B. Kim, S. K. Lee, J. W. Cho, T. H. Yoon, J. Mun, S. J. Park, T. Y. Kwon, S.-B. Lee, “Absolute frequency measurement of 1S0 (F=1/2)-3P0 (F=1/2) transition of 171Yb atoms in a one-dimensional optical lattice at KRISS,” Metrologia 50(2), 119–128 (2013).
[CrossRef]

G. K. Campbell, A. D. Ludlow, S. Blatt, J. W. Thomsen, M. J. Martin, M. H. G. de Miranda, T. Zelevinsky, M. M. Boyd, J. Ye, S. A. Diddams, T. P. Heavner, T. E. Parker, S. R. Jefferts, “The absolute frequency of the 87Sr optical clock transition,” Metrologia 45(5), 539–548 (2008).
[CrossRef]

S. Falke, H. Schnatz, J. S. R. V. Winfred, T. Middelmann, S. Vogt, S. Weyers, B. Lipphardt, G. Grosche, F. Riehle, U. Sterr, C. Lisdat, “The 87Sr optical frequency standard at PTB,” Metrologia 48(5), 399–407 (2011).
[CrossRef]

Nat. Commun. (1)

R. Le Targat, L. Lorini, Y. Le Coq, M. Zawada, J. Guéna, M. Abgrall, M. Gurov, P. Rosenbusch, D. G. Rovera, B. Nagórny, R. Gartman, P. G. Westergaard, M. E. Tobar, M. Lours, G. Santarelli, A. Clairon, S. Bize, P. Laurent, P. Lemonde, J. Lodewyck, “Experimental realization of an optical second with strontium lattice clocks,” Nat. Commun. 4, 2109 (2013).
[PubMed]

Nat. Photonics (1)

M. Takamoto, T. Takano, H. Katori, “Frequency comparison of optical lattice clocks beyond the Dick limit,” Nat. Photonics 5(5), 288–292 (2011).
[CrossRef]

Nature (2)

M. Takamoto, F.-L. Hong, R. Higashi, H. Katori, “An optical lattice clock,” Nature 435(7040), 321–324 (2005).
[CrossRef] [PubMed]

B. J. Bloom, T. L. Nicholson, J. R. Williams, S. L. Campbell, M. Bishof, X. Zhang, W. Zhang, S. L. Bromley, J. Ye, “An optical lattice clock with accuracy and stability at the 10-18 level,” Nature 506(7486), 71–75 (2014).
[CrossRef] [PubMed]

Opt. Express (7)

F.-L. Hong, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, “Doppler-free spectroscopy of molecular iodine using a frequency-stable light source at 578 nm,” Opt. Express 17(3), 1652–1659 (2009).
[CrossRef] [PubMed]

D. Akamatsu, M. Yasuda, T. Kohno, A. Onae, F.-L. Hong, “A compact light source at 461 nm using a periodically poled LiNbO3 waveguide for strontium magneto-optical trapping,” Opt. Express 19(3), 2046–2051 (2011).
[CrossRef] [PubMed]

K. Iwakuni, H. Inaba, Y. Nakajima, T. Kobayashi, K. Hosaka, A. Onae, F.-L. Hong, “Narrow linewidth comb realized with a mode-locked fiber laser using an intra-cavity waveguide electro-optic modulator for high-speed control,” Opt. Express 20(13), 13769–13776 (2012).
[CrossRef] [PubMed]

D. Akamatsu, Y. Nakajima, H. Inaba, K. Hosaka, M. Yasuda, A. Onae, F.-L. Hong, “Narrow linewidth laser system realized by linewidth transfer using a fiber-based frequency comb for the magneto-optical trapping of strontium,” Opt. Express 20(14), 16010–16016 (2012).
[CrossRef] [PubMed]

K. Matsubara, H. Hachisu, Y. Li, S. Nagano, C. Locke, A. Nogami, M. Kajita, K. Hayasaka, T. Ido, M. Hosokawa, “Direct comparison of a Ca+ single-ion clock against a Sr lattice clock to verify the absolute frequency measurement,” Opt. Express 20(20), 22034–22041 (2012).
[CrossRef] [PubMed]

H. Inaba, K. Hosaka, M. Yasuda, Y. Nakajima, K. Iwakuni, D. Akamatsu, S. Okubo, T. Kohno, A. Onae, F.-L. Hong, “Spectroscopy of 171Yb in an optical lattice based on laser linewidth transfer using a narrow linewidth frequency comb,” Opt. Express 21(7), 7891–7896 (2013).
[CrossRef] [PubMed]

Y. Nakajima, H. Inaba, K. Hosaka, K. Minoshima, A. Onae, M. Yasuda, T. Kohno, S. Kawato, T. Kobayashi, T. Katsuyama, F.-L. Hong, “A multi-branch, fiber-based frequency comb with millihertz-level relative linewidths using an intra-cavity electro-optic modulator,” Opt. Express 18(2), 1667–1676 (2010).
[CrossRef] [PubMed]

Opt. Lett. (1)

Phys. Rev. Lett. (3)

S. Blatt, A. D. Ludlow, G. K. Campbell, J. W. Thomsen, T. Zelevinsky, M. M. Boyd, J. Ye, X. Baillard, M. Fouché, R. Le Targat, A. Brusch, P. Lemonde, M. Takamoto, F.-L. Hong, H. Katori, V. V. Flambaum, “New limits on coupling of fundamental constants to gravity using 87Sr optical lattice clocks,” Phys. Rev. Lett. 100(14), 140801 (2008).
[CrossRef] [PubMed]

N. D. Lemke, A. D. Ludlow, Z. W. Barber, T. M. Fortier, S. A. Diddams, Y. Jiang, S. R. Jefferts, T. P. Heavner, T. E. Parker, C. W. Oates, “Spin-1/2 optical lattice clock,” Phys. Rev. Lett. 103(6), 063001 (2009).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, J. C. J. Koelemeij, D. J. Wineland, T. Rosenband, “Frequency comparison of two high-accuracy Al+ optical clocks,” Phys. Rev. Lett. 104(7), 070802 (2010).
[CrossRef] [PubMed]

Science (3)

N. Hinkley, J. A. Sherman, N. B. Phillips, M. Schioppo, N. D. Lemke, K. Beloy, M. Pizzocaro, C. W. Oates, A. D. Ludlow, “An atomic clock with 10-18 instability,” Science 341(6151), 1215–1218 (2013).
[CrossRef] [PubMed]

C. W. Chou, D. B. Hume, T. Rosenband, D. J. Wineland, “Optical clocks and relativity,” Science 329(5999), 1630–1633 (2010).
[CrossRef] [PubMed]

T. Rosenband, D. B. Hume, P. O. Schmidt, C. W. Chou, A. Brusch, L. Lorini, W. H. Oskay, R. E. Drullinger, T. M. Fortier, J. E. Stalnaker, S. A. Diddams, W. C. Swann, N. R. Newbury, W. M. Itano, D. J. Wineland, J. C. Bergquist, “Frequency ratio of Al+ and Hg+ single-ion optical clocks; metrology at the 17th decimal place,” Science 319(5871), 1808–1812 (2008).
[CrossRef] [PubMed]

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (3)

Fig. 1
Fig. 1

Schematic diagram of experimental setup. The two optical lattice clocks (OLCs) have different lattice geometries: Sr OLC uses a vertical optical lattice and Yb OLC uses a horizontal optical lattice. ECLD, extended cavity laser diode; PPLN-WG, periodically poled lithium niobate waveguide; ULE cavity, ultra-low-expansion cavity; PDH lock, Pound-Drever-Hall lock; EOM, electro-optic modulator; AOM, acousto-optic modulator. Local oscillators (LOs) are microwave sources.

Fig. 2
Fig. 2

Typical stretched state spectrum of the clock transition of (a) the Sr OLC and (b) the Yb OLC. The interrogation pulse durations were 40 ms in both cases.

Fig. 3
Fig. 3

(a) Frequency ratio measurements of Sr and Yb optical lattice clocks. The error bars are statistical. Data shown in this figure include the systematic corrections. (b) Allan standard deviation of the frequency ratio measurement for the measurement number 3 in Fig. 3(a).

Tables (1)

Tables Icon

Table 1 The fractional uncertainties and corrections of the Sr OLC, Yb OLC, and the frequency ratio measurement. The asterisks represent the value depending on the measurements.

Equations (5)

Equations on this page are rendered with MathJax. Learn more.

ν Sr = n Sr f rep #1 + f CEO #1 + f beat #1 + f AOM Sr
ν Yb = n Yb f rep #2 + f CEO #2 + f beat #2 + f AOM Yb .
f rep #1 = f rep #2 = f rep
f CEO #1 = f CEO #2 = f CEO .
ν Yb ν Sr =r (1+r) f CEO f beat #2 f AOM Yb +r( f beat #1 + f AOM Sr ) ν Sr ,

Metrics