本文建立了研究可调谐序列脉冲的振荡-间歇放大模型。它由三组速率方程组成,分别代表脉冲列形成过程中的振荡、间歇和放大三个阶段。根据该模型计算了介质的增益、脉冲列的幅度和光谱行为,研究了脉冲列的形成和发展过程。结果表明:(1)序列脉冲的一个周期内,增益系数大致在阈值上下波动,显示了增益饱和效应。(2)脉冲调制度和频率锁定效率随时间而有所下降,但在0.4μs时间内,脉冲调制度优于98％,频率锁定效率优于95％。(3)窄带运转的脉冲幅度接近宽带运转,这意味着由于谱线压窄引起的能量损耗不大。理论运算与实验结果基本一致。

A new method for producing tunable ns duration pulse trains was presented in refrenoe[3]. The oscillating-disoontinuous amplifying model for investigating tunable ns pulse trains is set up in this paper. It consists of three groups of the rate equations, which represent three stages respectively』that is the oscillating,"the resting and amplifying stage in the process of pulse trains formation. Based on this model, the gain of medium, amplitude and spectral behavior of the pulse trains are calculated,the process of forming and developing pulse trains is investigated. The results indicate: (1) The gain coefficient fluctuates across the threshold in a period of the pulse trainSjit appears as tlie gain sainration. (2) The degree of pulse modulation and the looking efficiency of frequency decrease with the time in some degree, while within 0.4μs the degree of the pulse modulation is better than 98%, the looking efficiency of frequency is better than 95%. The pulse amplitude of narrow band operating approaches to that of broadband operating, it means that, the energy loss caused by narrowing spectrum is only a few. The theoretical results are in agreement with experiments basically.