高灵敏调频——光外差激光光谱学探测技术

High Sensitive Frequenoy Modulation—Optical Heterodyne Laser Spectroscopy

本文论述了调频——光外差激光光谱学的基本原理和方法,给出了以其探测光学谐振腔以及物质吸收谱线的谐振特性时,基本关系式和典型系统的组成。实验结果表明,调频激光光谱学方法可以实现微弱谱线的高信噪比检测和用于气体、半导体激光器的频率稳定。

The thteory and method for frequency modulation (FM)-optical heterodynelaser spectroscopy is presented in this paper.The typical systems for probing resonanceof a opticalcavity and a spectroline of the absorbtion material are given too.The experimental results report-ed here show that FM laser spectroscopy can be used for probing weak spectroline with high sig-nal to noise ratio and stabilization of laser frequency with high precision.