An arbitrary pulse shape by compensating gain saturation in a solid-state Master oscillator\npower amplifier (MOPA) system made up of three Neodymium doped yttrium vanadate (Nd:YVO4)\namplifiers is demonstrated. By investigating the amplifier dynamics in detail, car-shaped pulse shapes\nwere obtained with compensated pulse distortion. Desired pulse shapes, such as multiple-step, square,\nparabolic, and Gaussian pulses, were achieved, with a high peak power level of 41.6 kW and a narrow\nlinewidth less than 0.06 nm. In addition, through second harmonic generation (SHG), a green laser\nwith different pulse shapes was obtained, with a maximum conversion efficiency of 42.6%.
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