title: A Portable Laser Photoacoustic Methane Sensor Based on FPGA.
abstract: A portable laser photoacoustic sensor for methane (CH₄) detection based on a field-programmable gate array (FPGA) is reported. A tunable distributed feedback (DFB) diode laser in the 1654 nm wavelength range is used as an excitation source. The photoacoustic signal processing was implemented by a FPGA device. A small resonant photoacoustic cell is designed. The minimum detection limit (1σ) of 10 ppm for methane is demonstrated.
authors.affiliation: School of Information Engineering, Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China. wangjw@swust.edu.cn.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Wang
authors.affiliation: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology and Research Center of Laser Fusion CAEP, Mianyang 621010, China. wanghl760@163.com.
authors.forename: Huili
authors.initials: H
authors.lastname: Wang
authors.affiliation: School of Information Engineering, Robot Technology Used for Special Environment Key Laboratory of Sichuan Province, Southwest University of Science and Technology, Mianyang 621010, China. Liuxianyong@swust.edu.cn.
authors.forename: Xianyong
authors.initials: X
authors.lastname: Liu
keywords: FPGA; diode laser; methane; photoacoustic spectroscopy