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采用脉冲调制的单模带尾纤输出的半导体激光器作为种子源,以掺镱光纤为增益介质,采用主振荡功率放大(MOPA)结构,实现了1030nm全光纤脉冲激光放大。脉冲重复频率在50～100kHz范围内可调,在重复频率50kHz时,实现了脉冲宽度为6.53ns,峰值功率为16.08kW的脉冲输出,相应的斜率效率为69%,输出激光的中心波长在1029.49nm。实验还研究了不同重复频率下输出激光脉冲的时域特性。该激光器的输出波长在激光雷达探测器的光谱响应范围内,可作为激光雷达发射光源。
A pulsed-mode single-mode fiber pigtail laser diode was used as the seed source and the Yb-doped fiber as the gain medium. The main oscillator power amplifier (MOPA) was adopted to realize 1030nm all-fiber pulsed laser amplification. The pulse repetition frequency is adjustable in the range of 50 ~ 100kHz. At the repetition rate of 50kHz, the pulse output with the pulse width of 6.53ns and the peak power of 16.08kW is realized, the corresponding slope efficiency is 69% and the center wavelength of the output laser is 1029.49 nm. The experiment also studied the time-domain characteristics of the output laser pulses at different repetition frequencies. The laser’s output wavelength is within the spectral response of the lidar detector and can be used as a lidar emission source.