基于声光调Q的高峰值功率全光纤脉冲激光器

High Peak-Power Q-Switched All-Fiber Pulsed Laser Based on Acousto-Optic Modulator

报道了基于声光调Q的高峰值功率全光纤脉冲激光器，通过改变驱动信号，可获得不同特性的脉冲激光输出。当重复频率为10kHz时，脉冲宽度在3～900ns可调。在脉冲宽度为65ns时，获得1．24w的平均功率输出，单脉冲能量0．13mJ，峰值功率2kW。当重复频率为100Hz时，可获得脉冲宽度为86ns、平均功率84mw的输出，单脉冲能量0．84mJ，峰值功率10kW。该激光器结构简单，可以通过调制方便地改变激光参数，可作为进一步放大、压缩脉冲和提高重复频率的种子源。

An all-fiber pulsed laser which can output different characteristic pulse laser by adjusting an acousto-optic modulator （AOM） is introduced. The pulses full width at half maximum （FWHM） vary from 3 ns to 900 ns at the repeat-frequency modulated to 10 kHz. Average output power 1.24 W is obtained at 10 kHz, and FWHM is 65 ns, single-pulse power is 0.13 mJ and peak power is 2 kW. At 100 Hz peak-power can reach 10 kW with output power 84 mW, single pulse power 0.84 mJ and FWHM 86 ns. The all-fiber laser has simple configuration, its parameter can be adjusted by AOM easily, which can greatly extend the applications in power amplification, pulse-compression and high-repeat frequency as laser seeds.