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报道了采用光纤耦合激光二极管(LD)模块端面抽运Nd∶YVO4晶体实现高功率、高重复频率声光调Q1342 nm波长的激光输出,以及采用考虑增益频谱分布的调Q速率方程模型仿真研究该脉冲激光器的结果。在激光器注入总功率40 W的情况下,可得到最高工作重复频率100 kHz;在50 kHz重复频率工作条件下,可得到11.0 W的平均输出功率及稳定的脉冲输出。应用与介质增益频谱相关的调Q速率方程模型对该脉冲激光器进行了仿真研究,得到了脉冲宽度、脉冲峰值功率、脉冲建立时间等计算结果,还给出了输出在频谱上的分布以及谱宽,并与实验结果进行了比较。考虑增益频谱分布的调Q速率方程模型不仅可以应用于分析、设计脉冲激光器的频谱,而且由于考虑了增益在频谱上的实际分布,基于该模型的仿真计算可以获得比传统单频调Q速率方程更为接近实际的结果。
The laser output of Q1342 nm with acousto-optic modulation of high power and high repetition rate is obtained by pumping Nd: YVO4 crystal at the end face of a fiber coupled laser diode (LD) module. The Q-rate equation model considering the spectral distribution of the gain is used to simulate the Q Pulsed laser results. With a total laser power of 40 W, a maximum operating repetition frequency of 100 kHz can be obtained; an average output power of 11.0 W and a stable pulse output are obtained at 50 kHz repetition rate. The Q-rate equation model which is related to the gain spectrum of the medium is used to simulate the pulsed laser. The calculation results of the pulse width, the peak power of the pulse and the pulse setup time are obtained. The distribution of the output spectrum and the spectral width , And compared with the experimental results. The Q-rate equation model considering the gain spectral distribution can not only be used to analyze and design the spectrum of the pulsed laser, but also the spectral distribution of the gain can be obtained. The simulation calculation based on this model can obtain the Q-rate equation More realistic results.