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采用885nm激光二极管(LD)作为抽运源,Cr,Nd…YAG双掺晶体和抗灰迹KTP(GTR-KTP)分别作为工作物质和倍频晶体,在室温下实现了直接端面抽运Cr,Nd…YAG/GTR-KTP腔内倍频自调Q稳定脉冲绿光激光高效输出。当吸收抽运光功率为1.65 W时,获得了200mW自调Q脉冲绿光激光输出,相应的光-光转换效率为12.1%。当吸收抽运光功率大于1.15 W时,获得了脉冲能量大于8μJ、脉冲宽度为8.8ns、峰值功率超过1kW的自调Q脉冲绿光激光输出。利用速率方程从理论上分析了不同Nd~(3+)离子掺杂浓度对Cr,Nd…YAG/GTR-KTP腔内倍频自调Q激光器输出倍频功率的影响,获得了实现高效绿光输出的优化掺杂浓度。相比于其他885nm LD抽运腔内倍频产生绿光激光的方法,直接抽运Cr,Nd…YAG/GTR-KTP腔内倍频自调Q激光器可作为理想的激光源并有效压缩脉冲宽度,是一种实现高效、短脉冲小型化绿光激光器的新方法。
885nm laser diode (LD) was used as pumping source, Cr, Nd ... YAG double doped crystal and anti-glitch KTP (GTR-KTP) were used as working substance and frequency doubling crystal respectively. Nd ... YAG / GTR-KTP intracavity frequency-doubled Q-stabilized pulsed green laser with high efficiency output. When the pump power was absorbed at 1.65 W, a 200 mW Q-switched green laser was obtained. The corresponding light-to-light conversion efficiency was 12.1%. When the pump power is greater than 1.15 W, a self-adjusting Q-pulse green laser output with a pulse energy of more than 8μJ, a pulse width of 8.8ns and a peak power of more than 1kW is obtained. The rate equations were used to theoretically analyze the effects of different Nd ~ (3 +) doping concentrations on the output power of Cr, Nd ... YAG / GTR-KTP intracavity frequency doubled Q-switched laser. The output of the optimal doping concentration. Compared with other 885nm LD intracavity to produce double-frequency laser green laser, direct pumping Cr, Nd ... YAG / GTR-KTP intracavity frequency doubler Q laser can be used as an ideal laser source and effectively compress the pulse width , Is a new method to achieve efficient, short pulse miniaturized green laser.