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利用固体激光器的弛豫振荡的尖峰脉冲特性,设计制作了一个窄脉宽、高重复频率的脉冲激光器。其方法是通过调节脉冲电流源的电流脉冲宽度,在固体激光器刚发出第一个尖峰脉冲时即关断泵浦电流。在实验中,对影响其尖峰脉冲参数的因素进行了探索,得出了尖峰脉冲的峰值功率、脉冲宽度与泵浦电流、腔长、输出镜透过率的关系,并从原理上对其进行了定性的分析和解释。基于实验及分析得到的结果,通过调整激光器的参数,设计出的脉冲激光器峰值功率能达到8W,脉宽能达到10 ns,重复频率可以达到百kHz的量级。文中的实验和分析结果对于固体激光器弛豫振荡的尖峰脉冲特性的理论认识及利用固体激光器弛豫振荡特性来设计脉冲激光器的参数设计都具有一定的指导意义。
A pulsed laser with a narrow pulse width and high repetition rate was designed and manufactured by using the characteristics of the spike of the relaxation oscillation of a solid laser. The method is by adjusting the current pulse width of the pulse current source, the solid state laser immediately after the first spike, the pump current is turned off. In the experiment, the factors influencing the peak pulse parameters were explored, and the relationship between peak power, pulse width and pump current, cavity length and output mirror transmittance was obtained and theoretically carried out Qualitative analysis and interpretation. Based on the experimental and analysis results, by adjusting the parameters of the laser, the designed pulse laser can reach the peak power of 8W and the pulse width of 10ns, and the repetition frequency can reach the magnitude of one hundred kilohertz. The experimental and analytical results in this paper are of guiding significance for theoretical understanding of the spiking characteristics of solid-state lasers and for the design of pulsed lasers using the relaxation characteristics of solid-state lasers.