中文摘要：

可调谐半导体激光吸收光谱（TDLAS）具有高分辨、高灵敏度和快速测量等特点，在环境检测、工业过程检测等方面具有很好的应用前景。但是TDLAS系统在长期连续工作时，存在激光输出波长随环境温度变化而发生漂移的问题。针对这一问题，研究了激光输出波长随环境温度变化特征及其对光谱处理的定量影响。为了消除激光输出波长的漂移，设计了基于AD／xC841的温度补偿电路。根据环境温度实时调整激光器的温度，对激光器进行谱线锁定，在温控实验箱中进行了实验，当环境温度为20℃～60℃时，激光器的波长漂移量为4．1pm。

英文摘要：

Tunable diode-laser absorption spectroscopy （TDLAS） has a good prospect of application, such as environmental monitoring, industrial process detection, due to its high resolution, high sensitivity and rapid measurement. But the wavelength of laser shifts with the change of ambient temperature when the system is working continuously for a long period of time. Aim at this problem, the wavelength variation with the change of temperature and the quantitative impact on spectral processing is studied. In order to eliminate the shift of wavelength, ADμC841 is used for temperature compensation, this system can re-set the temperature of the laser according to the ambient temperature to lock the laser spectrum. The experiment in temperature-controlled device at the temperature of 20℃-60℃ shows that the shift of laser wavelength is about 4.1 pm.