量子电子学报2025，Vol.42Issue(2)：187-195,9.DOI:10.3969/j.issn.1007-5461.2025.02.004
基于Fabry-Perot标准具的高精度波长实时监测方法研究
Investigation of high-precision real time wavelength monitoring method based on Fabry-Perot etalon
摘要
Abstract
When high-precision laser absorption spectroscopy techniques such as cavity ring-down spectroscopy and cavity enhanced spectroscopy are used in gas measurements,the stability of laser output wavelength directly affects the accuracy of measurement results.Therefore,accurate measurement of laser wavelength is crucial to high-sensitivity laser absorption spectroscopy technology.Taking the distributed feedback(DFB)laser commonly used in the cavity ring-down absorption spectrum as an application example,a wavelength monitoring system is built in this work based on Fabry-Perot(F-P)etalon.The system utilizes the interference phenomenon of F-P etalon,and adjusts the laser driving current to scan the wavelength.And at the same time,a standared wavelength meter is used as reference,then the functional relationship between wavelength and interference light intensity can be obtained,which will be used for inversion of wavelength information in the subsequent measurement.In the experiment,a DFB laser with central wavelength of 1653 nm is used,and the F-P system has realized the wavelength measurement in the range of 1653.66160 nm to 1653.77718 nm for this laser.The linear fitting correlation between the measurement results and the reading of the reference wavelength meter is 0.9999,which proves the reliability of the F-P wavelength monitoring system.In order to further verify the stability and measurement accuracy of the system,a 10-minute continuous monitoring is carried out at the central wavelength of the laser,and the results show that the system accuracy is±9.12×10-5 nm.It is indicated that this work is of great significance for realizing high-precision atmospheric background and isotope gas measurement by cavity ring-down absorption spectroscopy technology in the future.关键词
激光技术/激光吸收光谱/法布里-珀罗标准具/波长监测/干涉光强/腔衰荡吸收光谱Key words
laser techniques/laser absorption spectroscopy/Fabry-Perot etalon/wavelength monitoring/interference light intensity/cavity ring-down absorption spectroscopy分类
物理学引用本文复制引用
林雨晴,夏滑,张志荣,孙鹏帅,吴边,李哲,蔡永军..基于Fabry-Perot标准具的高精度波长实时监测方法研究[J].量子电子学报,2025,42(2):187-195,9.基金项目
国家重点研发计划(2022YFB3207601),安徽省自然科学基金杰青项目(2408085J001),国家自然科学基金(11874364,41877311,42005107),中国科学院合肥研究院"火花"基金(YZJJ2022QN02) （2022YFB3207601）
