Q-switched 1-J 100-

摘要

Abstract: Made up and investigated the prototype of lamp pumped, electro-optically Q-switched YAG:Nd laser, emitting approximately 1 J in one pulse with the pulse repetition rate 100 Hz. Laser schematics consists of master oscillator, double-pass preamplifier with SBS phase conjugate mirror and single pass final amplifier. Partial compensation of basic thermooptical distortions is done. It was found out that it is possible to eliminate astigmatism and diminish birefringence via interstage field relay and rotation of polarization plane in 90$DGR with simultaneous rotation in the same angle of the planes, containing the pumping lamps. It was found out, that the requirement of small jitter and phase conjugate compensation via SBS in liquid are in contradiction one with another due to the liquid breakdown. In the case of partial spectrum selection of master oscillator, the lower limit of average power of double pass amplifier with the liquid SBS mirror is caused by breakdown and the upper one - by phase conjugation aggravation due to distortions, exceeding the appropriate level.!12