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

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

2007-02-14

arxiv.org/abs/quant-ph/0702139v1

Optics Express 15, 4321 (2007)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

10.1364/OE.15.004321

We observe -9.01$\pm$0.14 dB of squeezing and +15.12$\pm$0.14 dB of antisqueezing with a local oscillator phase locked in homodyne measurement. In reference [1], two main factors are pointed out 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.

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