超高Q值光学微腔光谱信号采集系统设计与分析  

Design and Analysis of Spectral Signal Acquisition System Based on Ultra-High Q Factor Optical Microcavity

作　　者：蔡瑞涛 王梦宇 李雅婷 郭状 张海林[1] 谢成峰 张磊 吴涛[1] 伏燕军[1] Cai Ruitao;Wang Mengyu;Li Yating;Guo Zhuang;Zhang Hailin;Xie Chengfeng;Zhang Lei;Wu Tao;Fu Yanjun(Key Laboratory of Optoelectronic Information Science and Technology of Jiangxi Province,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China;Department of Precision Machinery and Precision Instruments,University of Science and Technology of China,Hefei 230026,Anhui,China)

机构地区：[1]南昌航空大学江西省光电信息科学技术重点实验室,江西南昌330063 [2]中国科学技术大学精密机械与精密仪器系,安徽合肥230026

出　　处：《光学学报》2023年第5期149-157,共9页Acta Optica Sinica

基　　金：国家自然科学基金(62101230,42175130,51865040);江西省自然科学基金(20202BABL212011,20202BABL211010,20202BABL212013,20203BBG73039,20224BAB202006);江西省教育厅基金(GJJ190508);南昌航空大学研究生创新专项资金(YC2022-081)。

摘　　要：针对超高品质因子Q值光学微腔实验系统的光谱数据采集难题,设计了一款针对光学微腔的光谱信号采集系统。对光谱信号采集系统进行了基本功能验证,证明了系统的稳定性和实用性;分别测试了基于电弧放电法制备的光纤微球腔与基于超精密抛光法制备的氧化硅晶体微盘腔。采集了光纤微球腔和氧化硅晶体微盘腔的透射谱,并对其模式谱线进行追踪。结果表明:光纤微球腔的Q值达到2.26×10^(6),氧化硅晶体微盘腔的Q值达到109;采集系统具有很好的消噪功能,模式谱线能长时间保持稳定。针对超高Q值光学微腔开发的光谱信号采集系统具有很高的可靠性,可用于微腔光子学系统以及后续微腔传感应用开发。Objective Whispering-gallery-mode optical micro-cavities have been extensively researched in narrow linewidth filters,biosensors,and nonlinear optics due to their small mode volume and ultra-high Q factor.Data acquisition and identification of mode spectral lines in real time are critical for experimental process control and index detection in research on optical micro-cavities.There are two typical detection strategies for spectral signals of optical micro-cavities.The first scheme uses a broadband light source to excite the whispering gallery modes of the optical micro-cavities,and the spectral signals are detected and evaluated by a spectrometer.It is costly,however,and thus this approach is only suitable for optical micro-cavities with a Q factor of less than 106.The other method for detecting spectral signals is to stimulate the whispering gallery modes by scanning the optical micro-cavity with a narrow linewidth laser.The stimulated spectral signal is then transformed by a photoelectric detector and sent to an oscilloscope for analysis.This approach is appropriate for ultra-high-Q optical micro-cavities,but it is incapable of analyzing the spectral signal in real time.In addition,there is an urgent need for an acquisition system with a high sampling rate,a rapid reaction time,and the capacity to monitor and analyze spectral data in real time for applications in high-sensitivity sensing of micro-cavities.Hence,a spectral signal acquisition system for optical micro-cavities is explored and constructed in this study to solve these issues.The system consists of an acquisition module,a data storage module,a data analysis module,and a data display module,which can show and analyze the spectral signals of optical micro-cavities in real time and has the benefit of quick acquisition.Moreover,it can set an arbitrary sampling interval and sampling time according to the requirements of different sensing systems,which solves the problems of capturing,analyzing,and displaying spectral signals in optical micro-cavities.Me

关 键 词：集成光学 光学微腔 光谱采集 微腔传感 品质因子 

分 类 号：O436[机械工程—光学工程]