A single frequency nanosecond pulsed fiber laser with a peak power of 58 kW is introduced,which is composed of a single frequency seed source and a main oscillation power amplifier(MOPA) structure with 4 stage fiber amplification. The continuous seed light generated by a single frequency seed source is modulated into nanosecond pulse signal light by an electro optical intensity modulator,and amplified by a 4 stage optical fiber amplifier. The average power of the fiber laser is 56.9 W with a slope efficiency of 71.7%. The frequency of the light is 100 kHz and pulse width is 9.8 ns,and the peak power is 58 kW. The center wavelength of the light is 1064.31 nm,beam quality M2 is 1.34,and PER is 15.6 dB. The further increase of laser power is limited by sub pulse and self phase modulation. The high peak power single frequency nanosecond pulsed fiber laser can be used in lidar.
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李尧,温强,张昆,李政,张浩彬,余洋.58kW高峰值功率窄线宽纳秒脉冲光纤激光器[J].激光与红外,2021,51(12):1605~1609 LI Yao, WEN Qiang, ZHANG Kun, LI Zheng, ZHANG Hao-bin, YU Yang.58kW high peak power single frequencynanosecond pulsed fiber laser[J]. LASER & INFRARED,2021,51(12):1605~1609