Wavelength modulation spectroscopy:: combined frequency and intensity laser modulation
Wavelength modulation spectroscopy:: combined frequency and intensity laser modulation
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DOI：
10.1364/ao.42.006728
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发表时间：
2003-11-20
期刊：
影响因子：
1.9
通讯作者：
Robert, P
中科院分区：
文献类型：
--
作者：
Schilt, S;Thévenaz, L;Robert, P
提出了在洛伦兹吸收线上使用半导体激光器的波长调制光谱的理论模型。这个理论描述了电流调制半导体激光器的一般情况，对于电流调制半导体激光器，发生了具有任意相移的强度和频率组合调制。在此模型的基础上，分析了几种调制参数对检测信号的影响。文中还给出了用2微米分布反馈激光器在二氧化碳吸收线上测量的实验信号，并验证了这一分析。这些实验结果与计算信号相吻合，证实了该模型的相关性。(C)2003年美国光学学会。
A theoretical model of wavelength modulation spectroscopy that uses a laser diode on a Lorentzian absorption line is presented. This theory describes the general case of a current-modulated semiconductor laser, for which a combined intensity and frequency modulation with an arbitrary phase shift occurs. On the basis of this model, the effect of several modulation parameters on the detected signals is evaluated. Experimental signals measured on an absorption line of CO2 by use of a 2-mum distributed-feedback laser are also presented and validate this analysis. These experimental results agree with the calculated signals, confirming the relevance of the model. (C) 2003 Optical Society of America.