Operating conditions for a tunable XeCl excimer laser have been optimi
zed for tunable narrow-band operation at 222 nm with KrCl, formed in K
r/He/Ne/HCl gas mixtures. This wavelength is interesting for detection
of nitric oxide (NO) in combustion environments. The laser emission c
oincides with the (1, 1) and (2, 2) bands of the NO A-X system. Laser-
induced-fluorescence spectra taken in a frame show specific excitation
of NO with this laser.