电光Q开关红宝石激光脉冲展宽的研究

Study of Pulse Stretching in Electro-optical Q-switched Ruby Laser System

从理论分析了电光Q开关红宝石激光的反转粒子数密度、腔损耗(含激光输出)与光子密度之间瞬态变化关系,导出了脉冲展宽条件。设计出与理论计算结果符合的电光调Q开关驱动电路,该电路在1μs内用3个信号的结合来驱动电子管FM-30工作。大量的实验表明,其结果与理论分析有较好的一致性。该系统得到了700 ns的激光展宽脉冲。

The temporal variation of the inversion density,the cavity loss （including laser output） and the photon density were analyzed by theoretical calculation in a electro-optical Q-switched ruby laser, and then the conditions of laser pulse stretching were calculated. An electro-optical Q-switched driver circuit which closely accords with the theoretical result was designed. This circuit uses a vacuum tube FM-30 which is successively driven by three signals in 1μs times. Through many experiments, it has been found that the experimental result is consistent with the theoretical analysis. Up to 700 ns duration pulse has been obtained experimentally.