论文部分内容阅读
激光二极管(LD)抽运固体激光器(SSLs)通过声光(A-O)调Q方法获得的短脉冲激光在激光测距、激光雷达等领域有着广泛的应用。从调Q速率方程出发,通过理论分析与合理的模拟,解释了脉冲输出平均功率和脉冲宽度与反转粒子数密度之间的关系。为了获得脉宽相对较窄的脉冲输出,在平-平谐振腔结构中使用LD单端抽运偏振吸收与发射的Nd:YVO4晶体,在抽运电流为32.6 A,重复频率为33.5 kHz,腔长为62 mm,输出镜透射率为50%的条件下获得了最短脉冲宽度为4.4 ns的脉冲激光输出。在抽运电流为31.6 A,腔长为77 mm的条件下,获得脉冲宽度为5.5 ns、峰值功率为26 kW的1064 nm脉冲激光输出。并且讨论了腔长、重复频率以及输出耦合镜透射率与脉冲宽度的变化关系。
Laser Diode (LD) Pumping Solid-State Lasers (SSLs) Short-pulse lasers obtained by acousto-optic (A-O) Q-switching are widely used in laser ranging and lidar applications. Based on the Q-rate equation, the relationship between the pulse power and the pulse width and the inverted population density is explained by theoretical analysis and reasonable simulation. In order to obtain a relatively narrow pulse width pulse output, LD single-ended pumping polarized absorption and emission of Nd: YVO4 crystal in a flat-resonant cavity structure, at a pumping current of 32.6 A, a repetition frequency of 33.5 kHz, cavity The pulse laser output with the shortest pulse width of 4.4 ns was obtained with a length of 62 mm and output mirror transmittance of 50%. At a pumping current of 31.6 A and a cavity length of 77 mm, a pulsed laser output of 1064 nm with a pulse width of 5.5 ns and a peak power of 26 kW was obtained. The relationship between cavity length, repetition frequency and output coupling mirror transmittance and pulse width is also discussed.