[16a-WL2_301-1~9] 3.7 Optical measurement, instrumentation, and sensor

11:45 AM - 12:00 PM JST(2:45 AM - 3:00 AM UTC)

[16a-WL2_301-9] Experimental validation of a TDLAS-optimized lidar system for H₂S gas detection

〇Keito Arifuku^1,2, Nofel Lagrosas³, Tatsuo Shiina² (1.Mitsubishi Electric Corp., 2.Chiba Univ., 3.Kyushu Univ.)

Keywords:

Tunable diode laser absorption spectroscopy,Hydrogen sulfide,Lidar

This study develops a tunable diode laser absorption spectroscopy (TDLAS) method for quantitative H2S measurements and integrates it into a lidar-based remote-sensing system. By accounting for pressure- and temperature-dependent line variations with HITRAN-guided simulations, the optimized TDLAS achieves high-precision quantification across 100–1100 ppm. Integration time improves the detection limit from 10 ppm at 1 s to 81 ppb at 100 s, but sensitivity declines at longer times due to system noise. The lidar configuration uses a stable eye-safe laser and calibration-free measurement, with results agreeing well with HITRAN and showing potential for remote sensing of H2S.