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arXiv quant-ph/0702139quant-ph
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零差测量中相稳定性改善的-9 dB正交压缩观测

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

Yuishi Takeno, Mitsuyoshi Yukawa, Hidehiro Yonezawa, Akira Furusawa

摘要:

我们观察到-9.01 $\pm$ 0.14 dB的压缩和+15.12 $\pm$ 0.14 dB的反压缩与本地振荡器锁相零差测量。文献[1]指出了影响压缩能级的两个主要因素:零差测量中的相位起伏和用于压缩的光参量振荡器的腔内损耗。改进了零差测量的相稳定性,降低了腔内损耗。我们测量了压缩和反压缩能级与泵浦功率的关系,这与考虑相位涨落的理论计算结果吻合得很好。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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