可控制变频率微片激光器

 用20 W光纤耦合LD作为泵浦光源，对Nd^{3+sup>:YVO_{4/sub>微片进行了增益开关实验，获得了可控制变重复频率（1 Hz～25 kHz）的调Q激光输出。输出脉冲激光的宽度为16 ns，输出的峰值功率在几W。从速率方程出发进行了增益开关理论研究，通过数值解，分析了输出激光特性：当泵浦电流高于产生单脉冲的电流时，增加泵浦电流将在一个泵浦脉宽中出现多个激光脉冲输出；增加泵浦脉宽，将在一个泵浦脉宽中出现多个激光脉冲输出，泵浦脉宽越大，子脉冲个数越多；当增加重复频率时，输出与泵浦激光重复频率完全一致的激光脉冲，但也将在一个泵浦脉宽中出现多个激光脉冲输出。}}

1 Hz～25 kHz repetition rate controllable microchip laser

Using a 20 W fiber coupled LD as the pump source, the experiment of the gain-swithed Nd3+:YVO4 microchip laser was presented. 1 Hz～25 kHz repetition rate controllable Q switched laser with several W was obtained. The gain-switching from rate equation was theoretically investigated, and through the numerical solution the laser characteristics are analyzed. When the pump current is higher than the current which generates the single pulse, increasing the pump current or increasing the width of the pump current will generate several sub-pulses in one pump pulse. The wider the pump pulse is, the more output sub-pulses will be included in pump pulse. Increasing the repetition rate, the output laser has the same repetition rate as the pump laser, but more sub-pulses will be output in one pump pu