基于腔损耗扫描寻优的光腔衰荡高反射率测量  

High Reflectivity Measurement Based on the Intracavity Loss Scanning of Ring-Down Cavity

作　　者：田中州 何星[1,2,3] 王帅 杨平[1,2,3] 许冰 Tian Zhongzhou;He Xing;Wang Shuai;Yang Ping;Xu Bing(Key Laboratory on Adaptive Optics,Chinese Academy of Sciences,Chengdu 610209,Sichuan,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,Sichuan,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电技术研究所自适应光学重点实验室,四川成都610209 [2]中国科学院光电技术研究所,四川成都610209 [3]中国科学院大学,北京100049

出　　处：《激光与光电子学进展》2023年第7期135-140,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61805251,61875203,11811530290,11704382);中国科学院青年创新促进会(2017429)。

摘　　要：针对目前腔失调参数与腔损耗之间的映射关系并不明确,调腔过程中腔相对失调量亦不明晰等问题,提出一种基于腔失调参数扫描的腔损耗寻优调腔方法。该方法通过腔镜倾斜调节量的扫描寻优,以光腔衰荡时间为判据寻找初始腔和测试腔相对失调优化的腔状态。实验结果表明:通过该方法,对同一高反射率待测样片6次实验测量结果的测量重复性精度相比传统方法由1.26×10^(−4)提高到约9.83×10^(−6),测量重复性峰谷值由3.25×10^(−4)提高到2.7×10^(−5),测量结果更稳定,表明该方法能获得腔参数相对失调更小的调腔状态,为在初始腔反射率较低的光腔衰荡测量系统中抑制衰荡腔相对失调提供了一种解决方案。Aiming at the problem that the mapping relation between cavity misalignment parameters and cavity loss is unclear,and the relative cavity offset is not clear during the cavity tuning process,this study proposes a cavity loss optimization method based on cavity misalignment parameter scanning.In this method,the scanning optimization of the tilt adjustment of the cavity mirror was carried out.Similarly,the optimized cavity state of the relative misalignment between the initial cavity and test cavity was determined based on the ring-down time of the optical cavity.The experimental results reveal that there is an improvement in the measurement repeatability accuracy of the six experimental measurement results of the same high reflectivity sample,from 1.26×10^(−4) to 9.83×10^(−6).Furthermore,the measurement repeatability peak-to-valley value increases from 3.25×10^(−4) to 2.7×10^(−5) compared with the traditional method.Thus,the results verify that the proposed method can obtain a cavity tuning state with less relative cavity misalignment,which improves the optical cavity ring-down measurement system with low-initial cavity reflectivity.

关 键 词：测量 光腔衰荡 高反射率测量 腔损耗寻优 基横模 

分 类 号：TN247[电子电信—物理电子学]