基于频率锁定的腔衰荡光谱技术及其在镜面反射率测量中的应用

大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (5): 425-431.

基于频率锁定的腔衰荡光谱技术及其在镜面反射率测量中的应用

赵刚, 李志新, 谭巍, 邱晓东, 马维光*, 董磊, 张雷, 尹王保, 贾锁堂

（山西大学激光光谱研究所，量子光学与光量子器件国家重点实验室，太原，030006）

收稿日期:2014-11-10 修回日期:2014-11-26 出版日期:2015-09-28 发布日期:2015-09-11
通讯作者: 马维光，（1976-），男，博士，副教授，主要从事激光技术、超灵敏红外痕量气体探测技术等方面的研究。 E-mail:mwg@sxu.edu.cn
作者简介:赵刚，（1990-），男，山西省晋中市人，研究生，主要从事痕量气体检测方面的研究工作。
基金资助:
国家重点基础研究发展计划(973计划)（2012CB921603）、国家高技术研究发展计划(863计划)（2009AA063006）、国家自然科学基金（61127017、61275213、61205216、61108030、61178009、60908019）、山西省青年科学研究基金（2010021003-3、2012021022-1）资助

Cavity Ring-Down Spectroscopy Based on the Frequency Locking and Application in Mirror Reflectivity Measurement

ZHAO Gang, LI zhixin, TAN Wei, QIU Xiaodong, MA Weiguang*, DONG Lei, ZHANG Lei, YIN Wangbao, JIA Suotang

(Insitute of Laser Spectroscopy, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan 030006,China)

Received:2014-11-10 Revised:2014-11-26 Published:2015-09-28 Online:2015-09-11

摘要/Abstract

摘要：

腔衰荡光谱技术(CRDS)由于其具有高灵敏度、高精度、装置简单等特点，被广泛应用于痕量气体检测、镜面反射率测量等领域。建立了一套基于连续波频率的腔衰荡光谱(CW- CRDS)装置，基于Pound-Drever-Hall(PDH)频率锁定技术将激光器的频率锁定到光学腔的纵模上，从而保证了激光功率到腔模的高效耦合。通过观测不同的声光调制器(AOM)关断频率对应的透射信号，得到光路最佳关断频率为60 kHz。使用该系统测量了光学腔腔镜的反射率，通过与非锁定情况下测量得到的结果进行对比，得出锁定后的结果漂移减小，误差也压缩为非锁定情况下的1/3。

关键词: 腔衰荡光谱, Pound-Drever-Hall锁频, 反射率测量

Abstract:

Cavity ring-down spectroscopy (CRDS) was used widely in trace gas detection and mirror reflectivity measurement due to the characteristics of high sensitivity, high precision and simple device. A CRDS set was established based on the continuous wave. Pound-Drever-Hall (PDH) frequency laser locking technique was utilized to lock the frequency of the laser on the eigen frequency of the cavity, so as to achieve the goal of wavelength stability of laser. By observing the transmission signal with different frequency of switch signal bearing on the AOM, optimal cut-off frequency 60 kHz was gotten. Then the system was used to measure the reflectivity of the cavity mirrors. Compared with the measurement results without locking, the results indicats that the locking case has less drift and the error is compressed into one third.

Key words: cavity ring-down spectroscopy, Pound-Drever-Hall laser locking technique, reflection measurement

中图分类号:

O439

赵刚李志新谭巍邱晓东马维光董磊张雷尹王保贾锁堂. 基于频率锁定的腔衰荡光谱技术及其在镜面反射率测量中的应用[J]. 大气与环境光学学报, 2015, 10(5): 425-431.

ZHAO Gang, LI Zhi-Xin, TAN Wei, QIU Xiao-Dong, MA Wei-Guang, DONG Lei, ZHANG Lei, YIN Wang-Bao, JIA Suo-Tang. Cavity Ring-Down Spectroscopy Based on the Frequency Locking and Application in Mirror Reflectivity Measurement[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(5): 425-431.

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