Hydrogen sulphide detection using near-infrared diode laser and compact dense-pattern multipass cell

Tian Xing^{1, 2}, Cao Yuan^{1, 2}, Chen Jia-Jin¹, Liu Kun^{1, †}, Wang Gui-Shi¹, Gao Xiao-Ming¹

Simulated absorption spectra of 20-ppmv H₂S, 400-ppmv CO₂, and 1% H₂O in the tunable range of the laser.