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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 7 — Apr. 2, 2007
  • pp: 4321–4327

Observation of -9 dB quadrature squeezing with improvement of phase stability in homodyne measurement

Yuishi Takeno, Mitsuyoshi Yukawa, Hidehiro Yonezawa, and Akira Furusawa  »View Author Affiliations

Optics Express, Vol. 15, Issue 7, pp. 4321-4327 (2007)

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We observe -9.01±0.14 dB of squeezing and +15.12±0.14 dB of antisqueezing with a local oscillator phase locked in homodyne measurement. Suzuki et al. have pointed out two main factors in [Appl. Phys. Lett. 89, 061116 (2006)], which degrade the observed squeezing level:phase fluctuation in homodyne measurement and intracavity losses of an optical parametric oscillator for squeezing. We have improved the phase stability of homodyne measurement and have reduced the intracavity losses. We measure pump power dependences of the squeezing and antisqueezing levels, which show good agreement with theoretical calculations taking account of the phase fluctuation.

© 2007 Optical Society of America

OCIS Codes
(120.2920) Instrumentation, measurement, and metrology : Homodyning
(270.6570) Quantum optics : Squeezed states

ToC Category:
Quantum Optics

Original Manuscript: February 15, 2007
Revised Manuscript: March 22, 2007
Manuscript Accepted: March 22, 2007
Published: April 2, 2007

Yuishi Takeno, Mitsuyoshi Yukawa, Hidehiro Yonezawa, and Akira Furusawa, "Observation of -9 dB quadrature squeezing with improvement of phase stability in homodyne measurement," Opt. Express 15, 4321-4327 (2007)

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