Knowledge Bank

A continuous wave optically pumped iodine monofluoride laser operating on the $B3\pi (0+)\to X1\Sigma (0+)$ system is described. Laser operation was achieved on a series of rotational lines originating from $v\prime =2,3,4$, and 5. By tuning the dve laser pump source over a single rovibronic line, spectral structure was produced on the IF laser output that ws analyzed and found to be consistent with the hyperfine structure of the B state of IF. The nuclear quadrupole coupling constant,$-e0m0$, and the spin-rotation constant, $CI$, were determined as $(443\pm 70)$ MHz and $(34\pm 6)$ kHz, respectively, for the $(v\prime ,J\prime )=(3,19)$ state in IF(B).