中文摘要：

介绍了基于可调谐半导体激光吸收光谱的瓦斯遥测关键技术——可调谐半导体激光技术、信号降噪技术、痕量气体检测技术的应用现状,指出了瓦斯遥测关键技术中存在可调谐半导体激光器性能不稳定、瓦斯遥测距离短、信号降噪效果较差、痕量气体检测误差大等问题,提出了研发高性能可调谐半导体激光器、研究非线性和非稳定性信号降噪算法、设计适用于井下的数字锁相放大器是瓦斯遥测关键技术的发展方向。

英文摘要：

Application status of key technologies of gas telemetry based on tunable diode laser absorption spectroscopy were introduced including tunable diode laser technology,signal noise reduction technology and trace gas detection technology.Some problems of the key technologies of gas telemetry were pointed out,such as unstable performance of tunable diode laser,short distance of gas telemetry,poor signal noise reduction effect and big error of trace gas detection.Development directions of the key technologies of gas telemetry were proposed,which were developing tunable diode laser with high performance,studying nonlinear and unstable signal noise reduction algorithm,and designing digital lockin amplifier for underground.