Pulse nitrogen laser at high repetition rate

An output of 1.5 W of average power at 3371 Å is obtained from a pulsed nitrogen laser operating at a repetition rate of 1200 Hz. Pulse powers up to 300 kW are observed, with 10-ns pulse duration. The high repetition rate is made possible through the use of a closed-cycle transverse gas flow system to supply fresh ion-free gas to the laser for each pulse.