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A semiconductor laser is driven by a electrical circuit of gain switch, the variations of its pulse width and power vs bias current and driving pulse are studied. The optimal parameters are found. The shortest pulse width of this semiconductor laser is 26 ps. Also, using analytic?! model and numerical calculation, the experimental results are simulated successfully.

采用自行研制的增益开关驱动电路产生的电脉冲驱动半导体激光器,从实验上研究了输出激光的脉宽、功率随偏置电流及驱动电脉冲的变化情况,找出了最佳工作点。并通过解析模型和数值计算两种途径从理论上较好地解释了实验结果。

The temporal characteristics of tunable solid-state laser pumped by a Q-switched laser are studied theoreticall The formulas of the buildup time and the pulse-width of the oscillating mode for vibronic solid-state lasers with lifetime um-magtitude,pumped by a laser with 10 ns magtitude pulse-width which are shorter compared to the buildup time of the oscillating mode, have deduced.The theoretical model gain switch-ing model predicts that the temporal characteristics of the laser,the buildup time and the pulse-width...

The temporal characteristics of tunable solid-state laser pumped by a Q-switched laser are studied theoreticall The formulas of the buildup time and the pulse-width of the oscillating mode for vibronic solid-state lasers with lifetime um-magtitude,pumped by a laser with 10 ns magtitude pulse-width which are shorter compared to the buildup time of the oscillating mode, have deduced.The theoretical model gain switch-ing model predicts that the temporal characteristics of the laser,the buildup time and the pulse-width are dependent only on the pumping energy level and cavity length.

本文从理论上分析研究了调Q激光器泵浦的固体可调谐激光器的时间特性,推导出了这种寿命为μS量级的固体可调谐激光器,当用10ns量级脉宽激光泵浦时的激光脉冲建立时间公式和输出脉宽公式。这种泵浦时间远小于激光脉冲建立时间的增益开关型激光器的理论分析表明,其输出激光的时间特性仅取决于泵浦能量(密度)的水平和腔长(以及腔损耗),而与泵浦脉冲宽度和波形无关。

In this paper, a new kind of all solid state semiconductor laser pump-probe source was presented which was based on the principle of gain switch. By the control of direct current (DC) and radio frequency (RF) current applied to the source, two train pulses were made which had the repeat frequency of 1 GHz, pulse width of 50 ps and the delay time between two train pulses of around 200 ps.

从理论上和系统实验上阐述了一种新型全固化半导体激光抽运探针源。此抽运探针源利用激光增益开关控制的原理 ,通过控制直流偏置电流和射频驱动电流可产生两列重复频率在 1GHz左右 ,脉宽约为 50 ps的激光脉冲序列 ,并且两脉冲序列间的时间延迟在 2 0 0 ps范围可调。

 
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