Abstract

We report generation and measurement of a squeezed vacuum from a semi-monolithic Fabry-Pérot optical parametric oscillator (OPO) up to 100 MHz at 1550 nm. The output coupler of the OPO is a flat surface of a nonlinear crystal with partially reflecting coating, which enables direct coupling with waveguide modules. Using the OPO, we observed 6.2dB of squeezing at 2 MHz and 3.0 dB of squeezing at 100 MHz. The OPO operates at the optimal wavelength to minimize propagation losses in silica waveguides and looks towards solving a bottleneck of downsizing these experiments: that of coupling between a squeezer and a waveguide.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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    [Crossref]
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    [Crossref]

2018 (4)

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

A. Brieussel, K. Ott, M. Joos, N. Treps, and C. Fabre, “Toward a compact fibered squeezing parametric source,” Opt. Lett. 43, 1267–1270 (2018).
[Crossref] [PubMed]

C. Schäfermeier, M. Ježek, L. S. Madsen, T. Gehring, and U. L. Andersen, “Deterministic phase measurements exhibiting super-sensitivity and super-resolution,” Optica 5, 60–64 (2018).
[Crossref]

2017 (1)

2016 (5)

U. L. Andersen, T. Gehring, C. Marquardt, and G. Leuchs, “30 years of squeezed light generation,” Phys. Scripta 91, 053001 (2016).
[Crossref]

H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schnabel, “Detection of 15 dB squeezed states of light and their application for the absolute calibration of photoelectric quantum efficiency,” Phys. Rev. Lett. 117, 110801 (2016).
[Crossref]

J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
[Crossref]

T. Serikawa, J. Yoshikawa, K. Makino, and A. Frusawa, “Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator,” Opt. Express 24, 28383–28391 (2016).
[Crossref] [PubMed]

F. Kaiser, B. Fedrici, A. Zavatta, V. D’Auria, and S. Tanzilli, “A fully guided-wave squeezing experiment for fiber quantum networks,” Optica 3, 362–365 (2016).
[Crossref]

2015 (3)

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
[Crossref] [PubMed]

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
[Crossref]

J. Miller, L. Barsotti, S. Vitale, P. Fritschel, M. Evans, and D. Sigg, “Prospects for doubling the range of advanced LIGO,” Phys. Rev. D 91, 062005 (2015).
[Crossref]

2014 (1)

Y. Kurata, Y. Nasu, M. Tamura, Y. Muramoto, H. Yokoyama, and M. Itoh, “Fabrication of InP-PDs on silica-based PLC using heterogeneous integration technique,” J. Light. Technol. 32, 2841–2848 (2014).
[Crossref]

2013 (1)

2012 (2)

2011 (1)

2010 (1)

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

2009 (4)

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
[Crossref]

T. Umeki, M. Asobe, T. Yanagawa, O. Tadanaga, Y. Nishida, K. Magari, and H. Suzuki, “Broadband wavelength conversion based on apodized χ(2) grating,” J. Opt. Soc. Am. B 26, 2315–2322 (2009).
[Crossref]

M. Pysher, R. Bloomer, C. M. Kaleva, T. D. Roberts, P. Battle, and O. Pfister, “Broadband amplitude squeezing in a periodically poled KTiOPO4 waveguide,” Opt. Lett. 34, 256–258 (2009).
[Crossref] [PubMed]

M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
[Crossref]

2008 (2)

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
[Crossref]

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
[Crossref] [PubMed]

2007 (1)

K. Yoshino, T. Aoki, and A. Furusawa, “Generation of continuous-wave broadband entangled beams using periodically poled lithium niobate waveguides,” Appl. Phys. Lett. 90, 041111 (2007).
[Crossref]

2006 (1)

S. Suzuki, H. Yonezawa, F. Kannari, M. Sasaki, and A. Furusawa, “7db quadrature squeezing at 860nm with periodically poled KTiOPO4,” Appl. Phys. Lett. 89, 061116 (2006).
[Crossref]

2005 (1)

S. L. Braunstein and P. van Loock, “Quantum information with continuous variables,” Rev. Mod. Phys. 77, 513–577 (2005).
[Crossref]

2003 (1)

H. Takahashi, “Planar lightwave circuit devices for optical communication: present and future,” Proc. SPIE 5246, 520–531 (2003).
[Crossref]

1999 (1)

P. K. Lam, T. C. Ralph, B. C. Buchler, D. E. McClelland, H.-A. Bachor, and J. Gao, “Optimization and transfer of vacuum squeezing from an optical parametric oscillator,” J. Opt. B: Quantum Semiclassical Opt. 1, 469–474 (1999).
[Crossref]

1997 (2)

V. Berger, “Second-harmonic generation in monolithic cavities,” J. Opt. Soc. Am. B 14, 1351–1360 (1997).
[Crossref]

M. Dakna, T. Anhut, T. Opatrný, L. Knöll, and D.-G. Welsch, “Generating Schrödinger-cat-like states by means of conditional measurements on a beam splitter,” Phys. Rev. A 55, 3184 (1997).
[Crossref]

1996 (1)

1995 (1)

1994 (1)

C. Kim and P. Kumar, “Quadrature-squeezed light detection using a self-generated matched local oscillator,” Phys. Rev. Lett. 73, 1605–1608 (1994).
[Crossref] [PubMed]

1986 (1)

L.-A. Wu, H. J. Kimble, J. L. Hall, and H. Wu, “Generation of squeezed states by parametric down conversion,” Phys. Rev. Lett. 57, 2520 (1986).
[Crossref] [PubMed]

1985 (1)

R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley, “Observation of squeezed states generated by four-wave mixing in an optical cavity,” Phys. Rev. Lett. 55, 2409 (1985).
[Crossref] [PubMed]

1984 (1)

B. Yurke, “Use of cavities in squeezed-state generation,” Phys. Rev. A 29, 408–410 (1984).
[Crossref]

1983 (2)

D. F. Walls, “Squeezed states of light,” Nature 306, 141–146 (1983).
[Crossref]

R. W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M. Ford, A. J. Munley, and H. Ward, “Laser phase and frequency stabilization using an optical resonator,” Appl. Phys. B 31, 97–105 (1983).
[Crossref]

1981 (1)

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693–1708 (1981).
[Crossref]

1979 (1)

S. Brosnan and R. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. 15, 415–431 (1979).
[Crossref]

1976 (1)

A. Szilagyi, A. Hordvik, and H. Schlossberg, “A quasi-phase-matching technique for efficient optical mixing and frequency doubling,” J. Appl. Phys. 47, 2025–2032 (1976).
[Crossref]

1962 (1)

J. A. Armstrong, N. Bloembergen, J. Ducuing, and P. S. Pershan, “Interactions between light waves in a nonlinear dielectric,” Phys. Rev. 127, 1918–1939 (1962).
[Crossref]

Adhikari, R.

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
[Crossref]

Andersen, U. L.

Andrekson, P. A.

Z. Tong, C. Lundström, P. A. Andrekson, M. Karlsson, and A. Bogris, “Ultralow noise, broadband phase-sensitive optical amplifiers, and their applications,” IEEE J. Sel. Top. Quantum Electron. 18, 1016–1032 (2012).
[Crossref]

Anhut, T.

M. Dakna, T. Anhut, T. Opatrný, L. Knöll, and D.-G. Welsch, “Generating Schrödinger-cat-like states by means of conditional measurements on a beam splitter,” Phys. Rev. A 55, 3184 (1997).
[Crossref]

Aoki, T.

K. Yoshino, T. Aoki, and A. Furusawa, “Generation of continuous-wave broadband entangled beams using periodically poled lithium niobate waveguides,” Appl. Phys. Lett. 90, 041111 (2007).
[Crossref]

Armstrong, J. A.

J. A. Armstrong, N. Bloembergen, J. Ducuing, and P. S. Pershan, “Interactions between light waves in a nonlinear dielectric,” Phys. Rev. 127, 1918–1939 (1962).
[Crossref]

Armstrong, S. C.

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
[Crossref]

Asavanant, W.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

W. Asavanant, K. Nakashima, Y. Shiozawa, J. Yoshikawa, and A. Furusawa, “Generation of highly pure Schrödinger’s cat states and real-time quadrature measurements via optical filtering,” Opt. Express 25, 32227–32242 (2017).
[Crossref]

Asobe, M.

Ast, S.

Bachor, H.-A.

P. K. Lam, T. C. Ralph, B. C. Buchler, D. E. McClelland, H.-A. Bachor, and J. Gao, “Optimization and transfer of vacuum squeezing from an optical parametric oscillator,” J. Opt. B: Quantum Semiclassical Opt. 1, 469–474 (1999).
[Crossref]

Barsotti, L.

J. Miller, L. Barsotti, S. Vitale, P. Fritschel, M. Evans, and D. Sigg, “Prospects for doubling the range of advanced LIGO,” Phys. Rev. D 91, 062005 (2015).
[Crossref]

Battle, P.

Bauchrowitz, J.

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

Berger, V.

Bloembergen, N.

J. A. Armstrong, N. Bloembergen, J. Ducuing, and P. S. Pershan, “Interactions between light waves in a nonlinear dielectric,” Phys. Rev. 127, 1918–1939 (1962).
[Crossref]

Bloomer, R.

Bogris, A.

Z. Tong, C. Lundström, P. A. Andrekson, M. Karlsson, and A. Bogris, “Ultralow noise, broadband phase-sensitive optical amplifiers, and their applications,” IEEE J. Sel. Top. Quantum Electron. 18, 1016–1032 (2012).
[Crossref]

Braunstein, S. L.

S. L. Braunstein and P. van Loock, “Quantum information with continuous variables,” Rev. Mod. Phys. 77, 513–577 (2005).
[Crossref]

Breitenbach, G.

Brieussel, A.

Brosnan, S.

S. Brosnan and R. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. 15, 415–431 (1979).
[Crossref]

Buchler, B. C.

P. K. Lam, T. C. Ralph, B. C. Buchler, D. E. McClelland, H.-A. Bachor, and J. Gao, “Optimization and transfer of vacuum squeezing from an optical parametric oscillator,” J. Opt. B: Quantum Semiclassical Opt. 1, 469–474 (1999).
[Crossref]

Byer, R.

S. Brosnan and R. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. 15, 415–431 (1979).
[Crossref]

Carolan, J.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
[Crossref] [PubMed]

Caves, C. M.

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693–1708 (1981).
[Crossref]

Chelkowski, S.

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
[Crossref] [PubMed]

Chen, J.

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
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Kannari, F.

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H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
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J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
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Marquardt, C.

U. L. Andersen, T. Gehring, C. Marquardt, and G. Leuchs, “30 years of squeezed light generation,” Phys. Scripta 91, 053001 (2016).
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J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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P. K. Lam, T. C. Ralph, B. C. Buchler, D. E. McClelland, H.-A. Bachor, and J. Gao, “Optimization and transfer of vacuum squeezing from an optical parametric oscillator,” J. Opt. B: Quantum Semiclassical Opt. 1, 469–474 (1999).
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K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schnabel, “Detection of 15 dB squeezed states of light and their application for the absolute calibration of photoelectric quantum efficiency,” Phys. Rev. Lett. 117, 110801 (2016).
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S. Ast, M. Mehmet, and R. Schnabel, “High-bandwidth squeezed light at 1550 nm from a compact monolithic PPKTP cavity,” Opt. Express 21, 13572–13579 (2013).
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M. Mehmet, S. Ast, T. Eberle, S. Steinlechner, H. Vahlbruch, and R. Schnabel, “Squeezed light at 1550 nm with a quantum noise reduction of 12.3 dB,” Opt. Express 19, 25763–25772 (2011).
[Crossref]

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
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M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
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R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley, “Observation of squeezed states generated by four-wave mixing in an optical cavity,” Phys. Rev. Lett. 55, 2409 (1985).
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K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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Müller, T.

Müller-Ebhardt, H.

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
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Nakajima, F.

Nakamura, R.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
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Nakashima, K.

Nasu, Y.

Nishida, Y.

Nosaka, H.

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J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Oguma, M.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
[Crossref]

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Russell, N. J.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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Sano, K.

Saraf, S.

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
[Crossref]

Sasaki, M.

S. Suzuki, H. Yonezawa, F. Kannari, M. Sasaki, and A. Furusawa, “7db quadrature squeezing at 860nm with periodically poled KTiOPO4,” Appl. Phys. Lett. 89, 061116 (2006).
[Crossref]

Schäfermeier, C.

Schiller, S.

Schlossberg, H.

A. Szilagyi, A. Hordvik, and H. Schlossberg, “A quasi-phase-matching technique for efficient optical mixing and frequency doubling,” J. Appl. Phys. 47, 2025–2032 (1976).
[Crossref]

Schnabel, R.

H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schnabel, “Detection of 15 dB squeezed states of light and their application for the absolute calibration of photoelectric quantum efficiency,” Phys. Rev. Lett. 117, 110801 (2016).
[Crossref]

S. Ast, M. Mehmet, and R. Schnabel, “High-bandwidth squeezed light at 1550 nm from a compact monolithic PPKTP cavity,” Opt. Express 21, 13572–13579 (2013).
[Crossref] [PubMed]

M. Mehmet, S. Ast, T. Eberle, S. Steinlechner, H. Vahlbruch, and R. Schnabel, “Squeezed light at 1550 nm with a quantum noise reduction of 12.3 dB,” Opt. Express 19, 25763–25772 (2011).
[Crossref]

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
[Crossref] [PubMed]

Serikawa, T.

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

T. Serikawa, J. Yoshikawa, K. Makino, and A. Frusawa, “Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator,” Opt. Express 24, 28383–28391 (2016).
[Crossref] [PubMed]

Shadbolt, P. J.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
[Crossref] [PubMed]

Shiozawa, Y.

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

W. Asavanant, K. Nakashima, Y. Shiozawa, J. Yoshikawa, and A. Furusawa, “Generation of highly pure Schrödinger’s cat states and real-time quadrature measurements via optical filtering,” Opt. Express 25, 32227–32242 (2017).
[Crossref]

J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
[Crossref]

Sigg, D.

J. Miller, L. Barsotti, S. Vitale, P. Fritschel, M. Evans, and D. Sigg, “Prospects for doubling the range of advanced LIGO,” Phys. Rev. D 91, 062005 (2015).
[Crossref]

Silverstone, J. W.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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Slusher, R. E.

R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley, “Observation of squeezed states generated by four-wave mixing in an optical cavity,” Phys. Rev. Lett. 55, 2409 (1985).
[Crossref] [PubMed]

Sornphiphatphong, C.

J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
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Sparrow, C.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
[Crossref] [PubMed]

Steinlechner, S.

M. Mehmet, S. Ast, T. Eberle, S. Steinlechner, H. Vahlbruch, and R. Schnabel, “Squeezed light at 1550 nm with a quantum noise reduction of 12.3 dB,” Opt. Express 19, 25763–25772 (2011).
[Crossref]

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
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Suzuki, H.

Suzuki, S.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

S. Suzuki, H. Yonezawa, F. Kannari, M. Sasaki, and A. Furusawa, “7db quadrature squeezing at 860nm with periodically poled KTiOPO4,” Appl. Phys. Lett. 89, 061116 (2006).
[Crossref]

Szilagyi, A.

A. Szilagyi, A. Hordvik, and H. Schlossberg, “A quasi-phase-matching technique for efficient optical mixing and frequency doubling,” J. Appl. Phys. 47, 2025–2032 (1976).
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Takahashi, H.

H. Takahashi, “Planar lightwave circuit devices for optical communication: present and future,” Proc. SPIE 5246, 520–531 (2003).
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T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Takeda, S.

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
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Tamura, M.

Y. Kurata, Y. Nasu, M. Tamura, Y. Muramoto, H. Yokoyama, and M. Itoh, “Fabrication of InP-PDs on silica-based PLC using heterogeneous integration technique,” J. Light. Technol. 32, 2841–2848 (2014).
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Thompson, M. G.

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
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Z. Tong, C. Lundström, P. A. Andrekson, M. Karlsson, and A. Bogris, “Ultralow noise, broadband phase-sensitive optical amplifiers, and their applications,” IEEE J. Sel. Top. Quantum Electron. 18, 1016–1032 (2012).
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Treps, N.

Tsunashima, S.

Ukai, R.

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
[Crossref]

Umeki, T.

Vahlbruch, H.

H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schnabel, “Detection of 15 dB squeezed states of light and their application for the absolute calibration of photoelectric quantum efficiency,” Phys. Rev. Lett. 117, 110801 (2016).
[Crossref]

M. Mehmet, S. Ast, T. Eberle, S. Steinlechner, H. Vahlbruch, and R. Schnabel, “Squeezed light at 1550 nm with a quantum noise reduction of 12.3 dB,” Opt. Express 19, 25763–25772 (2011).
[Crossref]

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
[Crossref] [PubMed]

Valley, J. F.

R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley, “Observation of squeezed states generated by four-wave mixing in an optical cavity,” Phys. Rev. Lett. 55, 2409 (1985).
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van Loock, P.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
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M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
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S. L. Braunstein and P. van Loock, “Quantum information with continuous variables,” Rev. Mod. Phys. 77, 513–577 (2005).
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J. Miller, L. Barsotti, S. Vitale, P. Fritschel, M. Evans, and D. Sigg, “Prospects for doubling the range of advanced LIGO,” Phys. Rev. D 91, 062005 (2015).
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D. F. Walls, “Squeezed states of light,” Nature 306, 141–146 (1983).
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N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
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Ward, H.

R. W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M. Ford, A. J. Munley, and H. Ward, “Laser phase and frequency stabilization using an optical resonator,” Appl. Phys. B 31, 97–105 (1983).
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Ward, S. V. R.

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
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Weinstein, A. J.

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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M. Dakna, T. Anhut, T. Opatrný, L. Knöll, and D.-G. Welsch, “Generating Schrödinger-cat-like states by means of conditional measurements on a beam splitter,” Phys. Rev. A 55, 3184 (1997).
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Wu, A.

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
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L.-A. Wu, H. J. Kimble, J. L. Hall, and H. Wu, “Generation of squeezed states by parametric down conversion,” Phys. Rev. Lett. 57, 2520 (1986).
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L.-A. Wu, H. J. Kimble, J. L. Hall, and H. Wu, “Generation of squeezed states by parametric down conversion,” Phys. Rev. Lett. 57, 2520 (1986).
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Yamazaki, S.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
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Yanagawa, T.

Yang, Z.

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
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Yokoyama, H.

Y. Kurata, Y. Nasu, M. Tamura, Y. Muramoto, H. Yokoyama, and M. Itoh, “Fabrication of InP-PDs on silica-based PLC using heterogeneous integration technique,” J. Light. Technol. 32, 2841–2848 (2014).
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Yokoyama, S.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
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J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
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S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
[Crossref]

Yonezawa, H.

S. Suzuki, H. Yonezawa, F. Kannari, M. Sasaki, and A. Furusawa, “7db quadrature squeezing at 860nm with periodically poled KTiOPO4,” Appl. Phys. Lett. 89, 061116 (2006).
[Crossref]

Yoshikawa, J.

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

W. Asavanant, K. Nakashima, Y. Shiozawa, J. Yoshikawa, and A. Furusawa, “Generation of highly pure Schrödinger’s cat states and real-time quadrature measurements via optical filtering,” Opt. Express 25, 32227–32242 (2017).
[Crossref]

T. Serikawa, J. Yoshikawa, K. Makino, and A. Frusawa, “Creation and measurement of broadband squeezed vacuum from a ring optical parametric oscillator,” Opt. Express 24, 28383–28391 (2016).
[Crossref] [PubMed]

J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
[Crossref]

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
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Yoshino, K.

K. Yoshino, T. Aoki, and A. Furusawa, “Generation of continuous-wave broadband entangled beams using periodically poled lithium niobate waveguides,” Appl. Phys. Lett. 90, 041111 (2007).
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Yurke, B.

R. E. Slusher, L. W. Hollberg, B. Yurke, J. C. Mertz, and J. F. Valley, “Observation of squeezed states generated by four-wave mixing in an optical cavity,” Phys. Rev. Lett. 55, 2409 (1985).
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B. Yurke, “Use of cavities in squeezed-state generation,” Phys. Rev. A 29, 408–410 (1984).
[Crossref]

Zavatta, A.

Zhang, M.

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
[Crossref]

Zou, S.

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
[Crossref]

APL Photonics (1)

J. Yoshikawa, S. Yokoyama, T. Kaji, C. Sornphiphatphong, Y. Shiozawa, K. Makino, and A. Furusawa, “Invited article: Generation of one-million-mode continuous-variable cluster state by unlimited time-domain multiplexing,” APL Photonics 1, 060801 (2016).
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Appl. Phys. B (1)

R. W. P. Drever, J. L. Hall, F. V. Kowalski, J. Hough, G. M. Ford, A. J. Munley, and H. Ward, “Laser phase and frequency stabilization using an optical resonator,” Appl. Phys. B 31, 97–105 (1983).
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Appl. Phys. Lett. (2)

K. Yoshino, T. Aoki, and A. Furusawa, “Generation of continuous-wave broadband entangled beams using periodically poled lithium niobate waveguides,” Appl. Phys. Lett. 90, 041111 (2007).
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S. Suzuki, H. Yonezawa, F. Kannari, M. Sasaki, and A. Furusawa, “7db quadrature squeezing at 860nm with periodically poled KTiOPO4,” Appl. Phys. Lett. 89, 061116 (2006).
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IEEE J. Quantum Electron. (1)

S. Brosnan and R. Byer, “Optical parametric oscillator threshold and linewidth studies,” IEEE J. Quantum Electron. 15, 415–431 (1979).
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IEEE J. Sel. Top. Quantum Electron. (1)

Z. Tong, C. Lundström, P. A. Andrekson, M. Karlsson, and A. Bogris, “Ultralow noise, broadband phase-sensitive optical amplifiers, and their applications,” IEEE J. Sel. Top. Quantum Electron. 18, 1016–1032 (2012).
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IEEE Photonics Technol. Lett. (1)

N. Fang, Z. Yang, A. Wu, J. Chen, M. Zhang, S. Zou, and X. Wang, “Three-dimensional tapered spot-size converter based on (111) silicon-on-insulator,” IEEE Photonics Technol. Lett. 21, 820–822 (2009).
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J. Appl. Phys. (1)

A. Szilagyi, A. Hordvik, and H. Schlossberg, “A quasi-phase-matching technique for efficient optical mixing and frequency doubling,” J. Appl. Phys. 47, 2025–2032 (1976).
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J. Light. Technol. (1)

Y. Kurata, Y. Nasu, M. Tamura, Y. Muramoto, H. Yokoyama, and M. Itoh, “Fabrication of InP-PDs on silica-based PLC using heterogeneous integration technique,” J. Light. Technol. 32, 2841–2848 (2014).
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J. Opt. B: Quantum Semiclassical Opt. (1)

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Nat. Phys. (1)

K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K. McKenzie, S. V. R. Ward, A. J. Weinstein, and N. Mavalvala, “A quantum-enhanced prototype gravitational-wave detector,” Nat. Phys. 4, 472–476 (2008).
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Nature (1)

D. F. Walls, “Squeezed states of light,” Nature 306, 141–146 (1983).
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Opt. Express (5)

Opt. Lett. (3)

Optica (2)

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M. Dakna, T. Anhut, T. Opatrný, L. Knöll, and D.-G. Welsch, “Generating Schrödinger-cat-like states by means of conditional measurements on a beam splitter,” Phys. Rev. A 55, 3184 (1997).
[Crossref]

B. Yurke, “Use of cavities in squeezed-state generation,” Phys. Rev. A 29, 408–410 (1984).
[Crossref]

M. Gu, C. Weedbrook, N. C. Menicucci, T. C. Ralph, and P. van Loock, “Quantum computing with continuous-variable clusters,” Phys. Rev. A 79, 062318 (2009).
[Crossref]

Y. Shiozawa, J. Yoshikawa, S. Yokoyama, T. Kaji, K. Makino, T. Serikawa, R. Nakamura, S. Suzuki, S. Yamazaki, W. Asavanant, S. Takeda, P. van Loock, and A. Furusawa, “Quantum nondemolition gate operations and measurements in real time on fluctuating signals,” Phys. Rev. A 98, 052311 (2018).
[Crossref]

S. Yokoyama, R. Ukai, S. C. Armstrong, J. Yoshikawa, P. van Loock, and A. Furusawa, “Demonstration of a fully tunable entangling gate for continuous-variable one-way quantum computation,” Phys. Rev. A 92, 032304 (2015).
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Phys. Rev. D (2)

C. M. Caves, “Quantum-mechanical noise in an interferometer,” Phys. Rev. D 23, 1693–1708 (1981).
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J. Miller, L. Barsotti, S. Vitale, P. Fritschel, M. Evans, and D. Sigg, “Prospects for doubling the range of advanced LIGO,” Phys. Rev. D 91, 062005 (2015).
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H. Vahlbruch, M. Mehmet, K. Danzmann, and R. Schnabel, “Detection of 15 dB squeezed states of light and their application for the absolute calibration of photoelectric quantum efficiency,” Phys. Rev. Lett. 117, 110801 (2016).
[Crossref]

T. Eberle, S. Steinlechner, J. Bauchrowitz, V. Händchen, H. Vahlbruch, M. Mehmet, H. Müller-Ebhardt, and R. Schnabel, “Quantum enhancement of the zero-area sagnac interferometer topology for gravitational wave detection,” Phys. Rev. Lett. 104, 251102 (2010).
[Crossref] [PubMed]

H. Vahlbruch, M. Mehmet, S. Chelkowski, B. Hage, A. Franzen, N. Lastzka, S. Goßler, K. Danzmann, and R. Schnabel, “Observation of squeezed light with 10-dB quantum-noise reduction,” Phys. Rev. Lett. 100, 033602 (2008).
[Crossref] [PubMed]

Phys. Scripta (1)

U. L. Andersen, T. Gehring, C. Marquardt, and G. Leuchs, “30 years of squeezed light generation,” Phys. Scripta 91, 053001 (2016).
[Crossref]

Proc. SPIE (2)

H. Takahashi, “Planar lightwave circuit devices for optical communication: present and future,” Proc. SPIE 5246, 520–531 (2003).
[Crossref]

T. Serikawa, Y. Shiozawa, H. Ogawa, N. Takanashi, S. Takeda, J. Yoshikawa, and A. Furusawa, “Quantum information processing with a travelling wave of light,” Proc. SPIE 10535, 105351B (2018).

Rev. Mod. Phys. (1)

S. L. Braunstein and P. van Loock, “Quantum information with continuous variables,” Rev. Mod. Phys. 77, 513–577 (2005).
[Crossref]

Science (1)

J. Carolan, C. Harrold, C. Sparrow, E. Martín-López, N. J. Russell, J. W. Silverstone, P. J. Shadbolt, N. Matsuda, M. Oguma, M. Itoh, G. D. Marshall, M. G. Thompson, J. C. F. Matthews, T. Hashimoto, J. L. O’Brien, and A. Laing, “Universal linear optics,” Science 349, 711–716 (2015).
[Crossref] [PubMed]

Other (1)

G. Keiser, Optical fiber communications (Wiley, 2003).

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Figures (7)

Fig. 1
Fig. 1 Design of our OPO. Optical elements are placed on a dovetail groove. (a) A cross section. (b) An external view. (c) A schematic picture.
Fig. 2
Fig. 2 Schematic of the experimental setup. Co-doped Er/Yb fiber laser A and B are CW single frequency lasers at 1550 nm. Output of Fiber laser A is split into two beams by means of a 6 dB (75:25) coupler. The brighter beam is frequency doubled by a doubler module and used as the pump beam of the OPO. An alignment beam, a beam for generating a second harmonic in the OPO during alignment, is injected through a flippable mirror when needed. The squeezed vacuum from the OPO get interfered with a local oscillator beam collimated by a triplet lens (Collimater D) in a 50/50 beamsplitter and detected by a homodyne detector. Note that only important elements are depicted. FG, function generator; DM, dichroic mirror; PBS, polarizing beamsplitter; 50/50, 50/50 beamsplitter.
Fig. 3
Fig. 3 Raw data of noise power as a function of the phase of the LO beam (scanned by a triangle wave). Green lines are shot noises (without the pump beam), and purple lines are noises of squeezed vacuum. (a) Center frequency is set to 2 MHz. (b) Center frequency is set to 100 MHz. Resolution bandwidth is set to 1 MHz and video bandwidth is set to 300 Hz. Intensity of the pump beam before the OPO is 360 mW and intensity of the LO beam before the 50/50 beamsplitter is 3.5 mW.
Fig. 4
Fig. 4 Measured noise spectrum from 1 MHz to 300 MHz. (i) Anti-squeezed noise. (ii) Shot noise. (iii) Squeezed noise. (iv) Circuit noise. Each circle is obtained by scanning of the phase of the LO beam as well as Fig. 3. Lines are raw data from the spectrum analyzer. Every value is without any noise compensation. Resolution bandwidth is set to 1 MHz and video bandwidth is set to 300 Hz. Intensity of the pump beam before the OPO is 360 mW and intensity of the LO beam before the 50/50 beamsplitter is 3.5 mW. Because of a high pass filter with a cutoff frequency of 100 kHz in the homodyne detector, measured points at 1 MHz are slightly distorted.
Fig. 5
Fig. 5 Pump power dependence of squeezing level and anti-squeezing level from 1 MHz to 300 MHz. Intensity of the pump beam is (a) 360 mW, (b) 229 mW, (c) 139 mW, (d) 90 mW. Oscillation threshold and fHWHM are fitted to be 1.7 W and 92 MHz. Dashed lines in each graph are a theoretical fitting from Eq. (7).
Fig. 6
Fig. 6 Normalized noise power as a function of normalized pump amplitude ξ (square root of pump power divided by oscillation threshold 1.7 W). (a) at 2 MHz and (b) at 100 MHz. Dashed lines in each graph are a theoretical fitting from Eq. (7).
Fig. 7
Fig. 7 Result of simulation. (a) Expected coupling efficiency between the OPO and a square waveguide with each core size. (b) The electric field intensity distribution of the propagation mode in a waveguide with a core size of 63 μm.

Equations (7)

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E total = E forward + E backward ,
E forward = AL sinc ( Δ k Q L 2 )
E backward = AL sinc ( Δ k Q L 2 ) e i ( Δ k Q L + θ ) ,
| E total | 2 = ( A 2 L ) 2 sinc 2 ( Δ k Q L 2 ) cos 2 ( Δ k Q L 2 + θ ) ,
| E total | 2 = ( A 2 L ) 2 sinc 2 ( Δ k Q L )
| E total | 2 = ( A 2 L ) 2 ( 1 cos ( Δ k Q L ) Δ k Q L ) 2 .
V ± ( f ) = 1 ± ( 1 η ) T T + L 4 ξ ( 1 ξ ) 2 + ( f / f HWHM ) 2 ,

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