同步抽运I型光参量振荡器的量子理论：压缩超模的表征
Quantum theory of Synchronously Pumped type I Optical Parametric Oscillators: characterization of the squeezed supermodes
摘要：
提出了同步泵浦I型光参量振荡器（SPOPO）的量子模型。SPOPOs的动力学研究，通常涉及数百万的耦合信号的纵向模式，显着简化时，考虑？超级模式？它们是使参数相互作用对角化的所有信号模式的独立线性叠加。在这些超模的SPOPO动力学成为约100个独立的，单模简并的OPO，他们每个人都是一个挤压。一个推导出的压缩频谱的一般表达式中测量的平衡零差检测实验，适用于任何时间形状的本地振荡器。现实的情况下，然后研究使用分析和数值方法：振荡阈值的推导，压缩超模的频谱和时间形状的特点。
英文摘要：
Quantum models for synchronously pumped type I optical parametric oscillators (SPOPO) are presented. The study of the dynamics of SPOPOs, which typically involves millions of coupled signal longitudinal modes, is significantly simplified when one considers the ?supermodes?, which are independent linear superpositions of all the signal modes diagonalizing the parametric interaction. In terms of these supermodes the SPOPO dynamics becomes that of about a hundred of independent, single mode degenerate OPOs, each of them being a squeezer. One derives a general expression for the squeezing spectrum measured in a balanced homodyne detection experiment, valid for any temporal shape of the local oscillator. Realistic cases are then studied using both analytical and numerical methods: the oscillation threshold is derived, and the spectral and temporal shapes of the squeezed supermodes are characterized.
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