Investigations on Pressure Broadening Coefficients of NO Lines in the 1←0 Band for N2, CO2, Ar, H2, O2 and He

A tunable diode laser absorption spectroscopy (TDLAS)-based spectrometer employing a mid-infrared (Mid-IR) interband cascade (ICL) was developed and used to determine pressure broadening coefficients of two NO transitions at 1914.98 cm−1 1915.76 in the fundamental (1←0) band (R11.5 Ω1/2 Ω3/2) for CO2, N2, Ar, O2, He, H2. For first time, reliable consistent set six different pressure-broadening line has been measured by approach covering pressures from 100 970 mbar temperature 294 K. Air calculated based on N2 O2 coefficients. The stated H2, have relative errors 0.5–1.5% range. CO2 results lines are reported time. also compared previously available literature data. It found that agreement with values, whereas Ar He show larger differences.