结合光电负反馈和模式清洁器的噪声抑制系统  

Noise suppression system combining photoelectric negative feedback and mode cleaner

作　　者：吴紫伊 雷兴 闫智辉[1,2] 贾晓军 WU Ziyi;LEI Xing;YAN Zhihui;JIA Xiaojun(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

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,山西太原030006 [2]山西大学,极端光学协同创新中心,山西太原030006

出　　处：《量子电子学报》2024年第5期772-779,共8页Chinese Journal of Quantum Electronics

基　　金：国家自然科学基金(62122044,61925503,11904218,12147215,62135008);国家重点研发计划(2022YFA1404500);山西省高等学校科技创新项目(2019L0794);山西省"1331工程"重点学科建设计划。

摘　　要：光场噪声的有效抑制是开展精密测量研究的基础,特别是现代量子信息科学对光场噪声提出了散粒噪声极限的要求。本工作研究了一种结合光电负反馈和模式清洁器的噪声抑制系统,在边带模型和郎之万方程的基础上,分析了噪声抑制系统输出光场的噪声谱,讨论了光电负反馈回路的透射率、反馈增益以及光学模式清洁器的腔线宽对噪声抑制水平的影响。结果表明,该系统不仅可以有效抑制高频的强度噪声,使其达到散粒噪声极限,而且能够减小特定频率处的强度噪声。此外,引入带通滤波器能进一步扩展噪声抑制的水平和带宽。研究结果为实验研究提供了直接参考和必要基础。The effective suppression of laser noise is the basis of precision measurement research,and especially,it is required for modern quantum information science to reach shot noise limit in light field.A noise suppression system combining photoelectric negative feedback and mode cleaner is studied in this work.Based on the sideband model and Langevin equation,the noise spectrum of the output light field of the noise suppression system is analyzed,and the effects of the transmittance,feedback gain of the photoelectric negative feedback loop and the cavity linewidth of the optical mode cleaner on the noise suppression level are discussed.The results show that the system can not only effectively suppress the intensity noise at high frequency to reach the limit of shot noise,but also reduce the intensity noise at specific frequencies.In addition,the introduction of bandpass filter can further extend the level and bandwidth of noise suppression.The results provide direct reference and necessary basis for experimental research.

关 键 词：量子光学 强度噪声抑制 光电负反馈 模式清洁器 

分 类 号：O431.2[机械工程—光学工程]