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CN109596148B 一种提高压缩光探测装置干涉效率的方法 有权

一种提高压缩光探测装置干涉效率的方法
摘要：
本发明属于光学技术领域，提出了一种提高压缩光探测装置干涉效率的方法。所述方法包括以下步骤：将入射到光学参量腔的泵浦光功率调节到阈值以上，调节温度，使光学参量腔工作在泵浦光和信号光的双共振温度下；将光学参量腔的腔长锁定在双共振模式下，然后微调非线性晶体温度，获得较强的信号光；S3、调节第一匹配透镜组,使光学参量腔工作在阈值以上时输出的信号光与相干光在50/50分束镜上的干涉效率达到99.5%以上；S4、调节入射到光学参量腔的泵浦光功率，使其工作在阈值以下，输出压缩光场。本发明通过将不易调节的阈值以下输出信号光与相干光的干涉转换为阈值以上输出信号光与相干光的调节，干涉调节过程简便快速高效，精准度高。
摘要（英）：

The invention belongs to the technical field of optics, and discloses a method for improving interference efficiencies of compressed light detection devices. The method comprises the following steps of: S1, adjusting the power of pump light entering an optical parameter cavity to be above a threshold value, and adjusting the temperature to ensure that the optical parameter cavity works under a double-resonance temperature of the pump light and signal light; S2, locking a cavity length of the optical parameter cavity under a double-resonance mode, and finely adjusting the temperature of a nonlinear crystal to obtain relatively strong signal light; S3, adjusting a first matching lens group to ensure that the interference efficiencies of signal light and coherent light output when the opticalparameter cavity works above the threshold value on a 50/50 beam splitter is above 99.5%; and S4, adjusting the power of the pump light entering the optical parameter cavity to ensure that the optical parameter cavity works under the threshold value, so as to output a compressed optical field. According to the method, the interferences of difficult-to-adjust output signal light and coherent lightunder the threshold value are converted to output signal light and coherent light above the threshold value, and the interference adjusting process is simple, rapid, efficient and high in accuracy.

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