A methane telemetry system for 1653 nm DFB laser based on TDLAS‐WMS technology is developed in this article. The focus tunable lens is used as the collimating system of the telemetry device to solve the problem that the telemetry device cannot be dynamically adjusted under different detection environments. Experimental results show that the root mean square error was 7.6205 and the theoretical limit of detection (LoD) was 1.473 parts per million (ppm) while the optimal integration time reaches 30 s. The near‐infrared CH₄ telemetry system is suitable for different detection environments of natural gas leakage and has good detection performance and stable and reliable operation.

中文翻译：

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使用可调焦镜头增强基于DFBL的近红外CH4遥测系统的性能

本文开发了一种基于TDLAS-WMS技术的1653 nm DFB激光甲烷遥测系统。调焦透镜被用作遥测设备的准直系统，以解决遥测设备在不同检测环境下无法动态调节的问题。实验结果表明，当最佳积分时间达到30 s时，均方根误差为7.6205，理论检测限（LoD）为1.473 ppm。近红外CH ₄遥测系统适用于不同的天然气泄漏探测环境，探测性能好，运行稳定可靠。