一种宽带小型化全光纤强度差压缩态光源  

Broadband Miniaturized All-Fiber Source with an Intensity-Difference Squeezed State

作　　者：孙昂 郭学石 赵雯 李小英 Sun Ang;Guo Xueshi;Zhao Wen;Li Xiaoying(School of Precision Instruments and Opto-Electronics Engineering,Tianjin University,Tianjin 300072,China;Key Laboratory of Opto-Electronic Information Technology,Ministry of Education,Tianjin 300072,China)

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072 [2]教育部光电信息技术科学重点实验室,天津300072

出　　处：《激光与光电子学进展》2023年第11期334-339,共6页Laser & Optoelectronics Progress

摘　　要：实验演示了一台小型化的全光纤强度差压缩态光源。该光源采用色散位移光纤作为非线性介质,其脉冲泵浦光的重复频率约为50 MHz,具有结构稳定、体积小的优点。采用宽带宽差分探测器,在较宽的分析频率范围内对该光源的强度差压缩特性进行测量分析。结果表明:室温下该光源的频率小于65 MHz时,测得的强度差噪声低于散粒噪声极限;在频率为20 MHz处测到了约3.8 dB的强度差压缩。本研究为后续在时域上测量强度差压缩奠定了基础。In this study,a miniaturized light source with an intensity-difference squeezed state is fabricated.The light source uses a dispersion-shifted fiber as the nonlinear medium,and its pulse pump light repetition frequency is approximately 50 MHz.The light source has a stable structure and small size.The intensity difference compression characteristics of the light source in a wide range of frequencies are measured and analyzed using a broadband wide difference detector.The results show that the intensity difference noise measured at a frequency less than 65 MHz at room temperature is lower than the shot noise limit;furthermore,the intensity difference compression at 20 MHz is about 3.8 dB.This study lays a foundation for the measurement of the intensity difference squeeze in time domain.

关 键 词：压缩态光场 强度差压缩态光源 光纤参量放大器 连续变量量子光源 

分 类 号：O437[机械工程—光学工程]