掺钛蓝宝石激光器的增益开关特性研究  

Study on the gain-switching characteristics of Ti:sapphire lasers

作　　者：杨扬[1] 刘宏发[1] 张国威[1] 

机构地区：[1]北京理工大学

出　　处：《激光技术》1995年第4期204-208,共5页Laser Technology

摘　　要：实验研究了调ＱＮｄ：ＹＡＧ激光器泵浦的增益开关型掺钛蓝宝石激光器的时间特性，泵浦能量水平（泵浦能量／阈值能量）变化范围为２．１～３．８，腔长变化范围为２０ｃｍ～６０ｃｍ，并改变了腔的损耗。根据增益开关激光器时间特性的理论，激光脉冲的建立时间和其脉冲宽度取决于泵浦能量水平和腔长，并与腔损耗成反比，而与泵浦脉宽和波形无关，实验结果与理论分析相符。当用１０ｎｓ脉宽的激光脉冲泵浦时，在２０ｃｍ短腔长情况下获得了比泵浦光脉宽窄的仅４ｎｓ脉宽的激光脉冲。The temporal characteristics of a gain-switched Ti:sapphire laser pumped by a frequency-doubled Q-switched Nd:YAG laser have studied experimentally at the range of the pump level(pump energy/threshold energy)from 2.1 to 3.8,the cavity length from 20cm to 60cm. According to the theoretical model of the temporal characteristics for the gain-switching laser oscillator,the buildup time and pulse-width of the oscillating mode depend on the pump level and the cavity length,inversely as the cavity loss,and also is not dependent on the pump pulse-width and the waveshape. The experimental result coincides well with the theoretical analysis.The laser oscillator with a short cavity length L = 20cm pumped by a 10 ns pulse-width Q-switched laser outputs a 4ns shorter laser pulse.

关 键 词：掺钛蓝宝石 增益开关 时间特性 激光器 

分 类 号：TN248.13[电子电信—物理电子学]