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We demonstrate a high power high beam quality diode-pumped 1 112-nm Nd:YAG master-oscillator poweramplifier(MOPA)laser system.To increase the extraction efficiency and output power,a four-pass amplifier scheme is employed.Finally,the injected laser output power is amplified from 26 to 64 W with beam quality factor M2=2.85.Furthermore,a theoretical model that takes the temporal overlap inversion number dynamics into account is employed to analyze the performance of the MOPA laser system,and a good agreement with the experimental data is obtained.
The demonstrated high power high beam diode-pumped 1 112-nm Nd: YAG master-oscillator poweramplifier (MOPA) laser system. To increase the extraction efficiency and output power, a four-pass amplifier scheme is employed. Laser output power is amplified from 26 to 64 W with beam quality factor M2 = 2.85. Ferrthermore, a theoretical model that takes the temporal overlap inversion number dynamics into account is employed to analyze the performance of the MOPA laser system, and a good agreement with the experimental data is obtained.