OPA实验系统的晶体温度标定与光学相位锁定  

Crystal temperature calibrating and optical phase locking in an OPA system

作　　者：张多[1] 徐钏 张勇[2] ZHANG Duo;XU Chuan;ZHANG Yong(Northeastern University College of Sciences, Shenyang 110819, China;Nanjing University National Laboratory of Solid State Microstructures, Nanjing 210093, China)

机构地区：[1]东北大学理学院,沈阳110819 [2]南京大学,固体微结构国家重点实验室,南京210093

出　　处：《激光杂志》2018年第4期11-14,共4页Laser Journal

基　　金：辽宁省软科学研究计划(No.201602264)

摘　　要：连续变量纠缠光和压缩光在量子信息处理和量子精密测量领域有着重要的应用,产生连续变量纠缠光和压缩光的主要方法是利用光学参量放大（OPA）过程。在OPA过程中,一个高频的光子转化为两个低频光子,低频光子彼此关联,具有纠缠和压缩的性质。为获得稳定输出的压缩光,我们搭建了OPA系统,实现了腔长的锁定,泵浦光与信号光间相对相位的锁定。并标定了系统的相关参数,晶体最佳工作温度为65.5℃,阈值功率为56mW,测量了信号光增益与泵浦光功率的关系,为后续实验奠定了基础。Continuous-variable entangled light and squeezed light are important for applications to quantum information process and quantum metrology. And optical parameter amplifier（ OPA） is a major method to generate them.In OPA process,one high-frequency photon is transformed to two low-frequency photons,which are correlated to each other and have properties of entanglement and squeezing. To produce stable squeezed light,we set up a system of OPA and realize the cavity length locking,relative phase locking between pump light and signal light. And some parameters are calibrated,including the optimum working temperature 65. 5℃ of crystal and threshold power 56 mW. Relationship between pump light＇s power and gain of signal light is measured,which can be used as a reference for further experiment.

关 键 词：光学参量放大 晶体温度标定 相位锁定 

分 类 号：O437.4[机械工程—光学工程]