压缩态光场平衡零拍探测的位相锁定  

Locking the phase of balanced homodyne detection system for squeezed light

作　　者：张岩[1] 于旭东[1] 邸克[1] 李卫[1] 张靖[1] 

机构地区：[1]山西大学光电研究所,量子光学与光量子器件国家重点实验室,太原030006

出　　处：《物理学报》2013年第8期168-173,共6页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2011CB921601);国家自然科学基金重点项目(批准号:11234008);国家自然科学基金创新研究群体(批准号:61121064);国家教育部博士点基金(批准号:20111401130001)资助的课题~~

摘　　要：平衡零拍探测是测量量子光场的重要方法之一.通过对相位灵敏光学参量放大器注入的信号进行位相调制,然后利用平衡零拍探测系统测量光学参量放大器输出的压缩光.将相位灵敏光学参量分别运转在参量放大和参量缩小,通过观察噪声谱中的调制信号就可确定测量的量子光场是正交振幅或位相分量.通过解调位相调制信号可获得误差信号,实现锁定平衡零拍探测系统本底光与待测光场相对位相为零(对应于待测光场振幅噪声分量).The balanced homodyne detection technique is an important method to detect the quantum light field. The signal light injected into the phase sensitive optical parameter amplifier （OPA） is phase modulated. The output squeezed light of OPA is detected by the balanced homodyne detection system. When the phase sensitive OPA is operated at parametric amplification and deamplification respectively, we can judge which quadrature component of the quantum light field is measured by observing the modulation signal. We can demodulate the phase modulation signal to achieve the error signal, which is used to lock the relative phase of zero between the local and the quantum light fields （corresponding to the quadrature-amplitude of the unknown light field）.

关 键 词：平衡零拍探测 位相锁定 

分 类 号：O431.2[机械工程—光学工程]