We present and test against experiment a general technique that allows modular modeling of noise propagation in quantum optics experiments. Specifically, we consider a multielement frequency-doubling experiment that ultimately produces 1.7 dB/32% (3.0 dB/50% inferred) squeezing at 532 nm. Unlike previous theoretical treatments, we obtain completely analytical expressions for each element of the experiment. This allows intuitive analysis and straightforward experimental modeling. The exact role of driving noise is demonstrated: addition of a narrow linewidth mode cleaning cavity to reduce the driving noise improves the inferred squeezing from 0.75 to 3.0 dB. We find excellent agreement between the modular theory and experiment.
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机译：我们介绍并测试了一项通用技术，该技术可以在量子光学实验中对噪声传播进行模块化建模。具体来说，我们考虑进行多元素倍频实验，最终在532 nm处产生1.7 dB / 32％（推断为3.0 dB / 50％）的压缩。与以前的理论方法不同，我们对实验的每个元素都获得了完全解析的表达式。这样可以进行直观的分析和简单的实验建模。证明了驱动噪声的确切作用：增加窄线宽模式清洁腔以减少驱动噪声可将推断的压缩范围从0.75 dB改善到3.0 dB。我们在模块化理论与实验之间找到了极好的一致性。
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