ReactiveQswitching in a CO2multimode-multipass laser oscillator

Experiments with a CO
2
-N
2
-He multipass laser having a movable-end mirror are described. At constant mirror velocities ranging from 0.5 cm/s to 40.0 cm/s, pulsing was observed with repetition rates between 1-60 kHz and with apparent peak-pulse amplitudes of 10 times the CW output. Measurements were made for various cavity optical path lengths.