Abstract

We were able to control relative carrier-envelope phase slip among mode-locked Ti:sapphire and Cr:forsterite lasers by employing electronic feedback. The pulse timings of these lasers were passively synchronized with our crossing-beam technique. Since the optical-frequency ratio of Ti:sapphire and Cr:forsterite is approximately 3:2, we can observe the phase relation by superimposing the third harmonic of Cr:forsterite and the second harmonic of Ti:sapphire lasers in time and in space. The spectrum width of the locked beat note was less than 3 kHz, which corresponds to the controlled fluctuation of a cavity-length difference of less than 10 pm.

© 2003 Optical Society of America

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References

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  1. H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
    [CrossRef]
  2. D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
    [CrossRef] [PubMed]
  3. A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
    [CrossRef] [PubMed]
  4. Y. Kobayashi and K. Torizuka, Opt. Lett. 26, 1295 (2001).
    [CrossRef]
  5. R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
    [CrossRef] [PubMed]
  6. G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
    [CrossRef] [PubMed]
  7. M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
    [CrossRef] [PubMed]
  8. R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
    [CrossRef] [PubMed]
  9. T. W. Hänsch, Opt. Commun. 80, 71 (1990).
    [CrossRef]
  10. J. Rauschenberger, T. M. Fortier, D. J. Jones, J. Ye, and S. T. Cundiff, Opt. Express 10, 1404 (2002), http://www.opticsexpress.org .
    [CrossRef] [PubMed]
  11. S. A. Diddams, L. Hollberg, L.-S. Ma, and L. Robertsson, Opt. Lett. 27, 58 (2002).
    [CrossRef]
  12. Z. Wei, Y. Kobayashi, Z. Zhang, and K. Torizuka, Opt. Lett. 26, 1806 (2001).
    [CrossRef]
  13. Z. Wei, Y. Kobayashi, and K. Torizuka, in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2002), paper CThZ2.
  14. Z. Wei, Y. Kobayashi, and K. Torizuka, Opt. Lett. 27, 2121 (2002).
    [CrossRef]

2002 (4)

2001 (5)

Z. Wei, Y. Kobayashi, Z. Zhang, and K. Torizuka, Opt. Lett. 26, 1806 (2001).
[CrossRef]

Y. Kobayashi and K. Torizuka, Opt. Lett. 26, 1295 (2001).
[CrossRef]

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

2000 (2)

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

1999 (1)

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

1990 (1)

T. W. Hänsch, Opt. Commun. 80, 71 (1990).
[CrossRef]

Apolonski, A.

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Corkum, P. B.

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

Cundiff, S. T.

J. Rauschenberger, T. M. Fortier, D. J. Jones, J. Ye, and S. T. Cundiff, Opt. Express 10, 1404 (2002), http://www.opticsexpress.org .
[CrossRef] [PubMed]

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

De Silvestri, S.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Diddams, S. A.

S. A. Diddams, L. Hollberg, L.-S. Ma, and L. Robertsson, Opt. Lett. 27, 58 (2002).
[CrossRef]

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Drescher, M.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

Dunlop, A. E.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Fortier, T. M.

Grasbon, F.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Hall, J. L.

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Hänsch, T. W.

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

T. W. Hänsch, Opt. Commun. 80, 71 (1990).
[CrossRef]

Heinzmann, U.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Hentschel, M.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

Hollberg, L.

Holzwarth, R.

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Jones, D. J.

J. Rauschenberger, T. M. Fortier, D. J. Jones, J. Ye, and S. T. Cundiff, Opt. Express 10, 1404 (2002), http://www.opticsexpress.org .
[CrossRef] [PubMed]

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Kapteyn, H. C.

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

Keller, U.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Kienberger, R.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

Kitzler, M.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Kleineberg, U.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Kobayashi, Y.

Z. Wei, Y. Kobayashi, and K. Torizuka, Opt. Lett. 27, 2121 (2002).
[CrossRef]

Z. Wei, Y. Kobayashi, Z. Zhang, and K. Torizuka, Opt. Lett. 26, 1806 (2001).
[CrossRef]

Y. Kobayashi and K. Torizuka, Opt. Lett. 26, 1295 (2001).
[CrossRef]

Z. Wei, Y. Kobayashi, and K. Torizuka, in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2002), paper CThZ2.

Krausz, F.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Ma, L.-S.

S. A. Diddams, L. Hollberg, L.-S. Ma, and L. Robertsson, Opt. Lett. 27, 58 (2002).
[CrossRef]

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

Murnane, M. M.

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

Nisoli, M.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Paulus, G. G.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Poppe, A.

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Priori, E.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Ranka, J. K.

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Rauschenberger, J.

Reider, G. A.

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

Robertsson, L.

Scrinzi, A.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Shelton, R. K.

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

Spielmann, Ch.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Stagira, S.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Steinmeyer, G.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Stenger, J.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Stentz, A.

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Sutter, D. H.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Telle, H. R.

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Tempea, G.

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Torizuka, K.

Z. Wei, Y. Kobayashi, and K. Torizuka, Opt. Lett. 27, 2121 (2002).
[CrossRef]

Y. Kobayashi and K. Torizuka, Opt. Lett. 26, 1295 (2001).
[CrossRef]

Z. Wei, Y. Kobayashi, Z. Zhang, and K. Torizuka, Opt. Lett. 26, 1806 (2001).
[CrossRef]

Z. Wei, Y. Kobayashi, and K. Torizuka, in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2002), paper CThZ2.

Udem, Th.

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Uiberacker, M.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Villoresi, P.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Walther, H.

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Wei, Z.

Z. Wei, Y. Kobayashi, and K. Torizuka, Opt. Lett. 27, 2121 (2002).
[CrossRef]

Z. Wei, Y. Kobayashi, Z. Zhang, and K. Torizuka, Opt. Lett. 26, 1806 (2001).
[CrossRef]

Z. Wei, Y. Kobayashi, and K. Torizuka, in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2002), paper CThZ2.

Westerwalbesloh, Th.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Wieland, M.

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

Windeler, R. S.

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Ye, J.

Zhang, Z.

Appl. Phys. B (1)

H. R. Telle, G. Steinmeyer, A. E. Dunlop, J. Stenger, D. H. Sutter, and U. Keller, Appl. Phys. B 69, 327 (1999).
[CrossRef]

Nature (1)

G. G. Paulus, F. Grasbon, H. Walther, P. Villoresi, M. Nisoli, S. Stagira, E. Priori, and S. De Silvestri, Nature 414, 182 (2001).
[CrossRef] [PubMed]

Opt. Commun. (1)

T. W. Hänsch, Opt. Commun. 80, 71 (1990).
[CrossRef]

Opt. Express (1)

Opt. Lett. (4)

Phys. Rev. Lett. (1)

A. Apolonski, A. Poppe, G. Tempea, Ch. Spielmann, Th. Udem, R. Holzwarth, T. W. Hänsch, and F. Krausz, Phys. Rev. Lett. 85, 740 (2000).
[CrossRef] [PubMed]

Science (4)

M. Drescher, M. Hentschel, R. Kienberger, G. Tempea, Ch. Spielmann, G. A. Reider, P. B. Corkum, and F. Krausz, Science 291, 1923 (2001).
[CrossRef] [PubMed]

R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, M. Drescher, and F. Krausz, Science 297, 1144 (2002).
[CrossRef] [PubMed]

R. K. Shelton, L.-S. Ma, H. C. Kapteyn, M. M. Murnane, J. L. Hall, and J. Ye, Science 293, 1286 (2001).
[CrossRef] [PubMed]

D. J. Jones, S. A. Diddams, J. K. Ranka, A. Stentz, R. S. Windeler, J. L. Hall, and S. T. Cundiff, Science 288, 635 (2000).
[CrossRef] [PubMed]

Other (1)

Z. Wei, Y. Kobayashi, and K. Torizuka, in Conference on Lasers and Electro-Optics, Vol. 73 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2002), paper CThZ2.

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Figures (5)

Fig. 1
Fig. 1

Schematic of beat measurement in frequency-domain space. Dashed lines, combs of the TiS and CrF pulses; solid lines, combs of the SH of the TiS and the TH of the CrF pulses. The optical-frequency differences (beat frequencies) among the SH of the TiS pulses and the TH of the CrF pulse are 3δCrF-2δTiS, 3δCrF-2δTiS-frep, 3δCrF-2δTiS+frep,.

Fig. 2
Fig. 2

Experimental setup: solid lines, optical paths; dashed lines, electrical paths. PD, p-i-n photodiode; LPFs, low-pass filters; BPF, bandpass filter; 1/4, frequency divider; HM, half-mirror; D.C., directional coupler; PBS, polarized beam splitter; HV amp, high-voltage amplifier; THG, third-harmonic generation; SHG, second-harmonic generation. Other abbreviations defined in text.

Fig. 3
Fig. 3

rf power spectrum of a combined frequency-doubled TiS laser and a frequency-tripled CrF laser in a 100-MHz span.

Fig. 4
Fig. 4

Beat signal locked by only PZT in a 10-MHz span. The RBW is 10 kHz, and 100 traces are averaged. The spectrum width of the locked beat is 100 kHz. Inset, power spectrum of the error signal with (solid curve) and without (dashed curve) feedback.

Fig. 5
Fig. 5

rf power spectrum of the locked beat fbeat=3/4 frep over a 10-trace average in a 0.8-MHz span. The data acquisition time is 2 s. The spectrum bandwidth is 3 kHz (RBW).

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