Fig. 1. Light path diagram of LD side pumped Nd∶YAG pulse group laser

Fig. 2. Variation of Q crystal voltage with time after Q switch open

Fig. 3. Work waveform of electro-optic Q-switched power

Fig. 4. Three subpulses outputs of electro-optic Q-switched

Fig. 5. Instantaneous waveforms of three subpulses. (a) The first pulse; (b) the second pulse; (c) the third pulse

Fig. 6. Relationship between laser output energy and input energy

Fig. 7. Laser output subpulse when subpulse interval is 1 μs