Near single-line operation of a free burning CS2/O2/N2O flame laser with a non-dispersive optical cavity

CO laser output spectra between 5 and 5.5μm for the free-burning CS₂/O₂N₂O flame laser were examined. Under certain conditions of high 0₂ and high N₂O flow, the spectra were found to be nearly single line in nature with most of the laser output occurring on the P_10-9(17) line at 5.4265μm. This is the same line that was reported to lase in a nearly single-line fashion in an electrically- assisted longitudinal CO chemical laser.