同步调制调Q射频波导CO2激光器研究

为了斩断调Q脉冲拖尾，提高激光器电光效率，提出了一种在机械调Q射频激励波导CO₂激光器中采用同步调制的激励方式。实验研究了同步调制信号对调Q脉冲拖尾长度、脉冲宽度、峰值功率和电光效率的影响。结果表明，当同步调制信号截断时刻为-80μs时，调制调Q脉冲拖尾长度最短，为23μs; 当同步调制信号无激励时长为800μs时，电光效率最高且为3%。采用同步调制的激励方式可以在有效斩断脉冲拖尾的同时保持脉冲宽度基本不变，提高了激光器的峰值功率和电光效率。

Study on synchronous modulation Q-switched RF excitated waveguide CO2 laser

In order to cut off the Q-switched pulse trailing and improve the electro-optical efficiency, an exciting mode of synchronous modulation in a mechanical Q-switched radio frequency (RF) excited waveguide CO₂ laser was proposed. The effects of synchronous modulation signal on the tail length of Q-switched pulse, pulse width, peak power and electro-optical efficiency were studied experimentally. The results show that, when the cut-off time of synchronous modulation signal is -80μs, the tail length of modulation Q-switched pulse is the shortest of 23μs. The electro-optical efficiency is the highest of 3% when the non-excitation duration of synchronous modulation signal is 800μs. The excitation mode of synchronous modulation can effectively cut off the pulse tail and keep the pulse width at the same time, and improve the peak power and electro-optical efficiency.