激光二极管双端抽运Tm:YAP激光器

Laser Diode-Dual-End-Pumped Tm:YAP Laser

简要分析了掺铥铝酸钇(Tm∶YAP)晶体的能级结构及吸收光谱特性,报道了一种室温条件下的激光二极管(LD)双端面抽运Tm∶YAP激光器。激光器输出的中心波长为1996 nm,2μm连续激光输出功率为40.7 W,光-光转换效率为30.4%,斜率效率为41.1%。经过声光(AO)调制后获得重复频率为10 kHz的脉冲激光输出,输出功率为34.6 W,激光脉冲宽度为92.08 ns,光-光转换效率为25.9%,斜率效率为32.9%。光束发散角x方向为11.6 mrad,y方向为12.2 mrad。

The energy level diagram and absorption spectrum of TIn：YAP crystal are analyzed, and Tm：YAP laser dual-end-pumped by laser diode is presented. The wavelength of laser is 1996 nm, the output power of 2 μm continuous wave laser is 40. 7 W, the corresponding optical-to-optical efficiency is up to 30.4%, and the slope efficiency is 41.1%. While the acoustic-optical （AO） Q-switch is working at the repetition rate of 10 kHz, the average power is 34. 6 W, the single pulse width is 92.08 ns, the corresponding optical-to-optical efficiency is 25.9%, and the slope efficiency is 32. 9%. The divergence angles are 11. 6 mrad （horizontal） and 12. 2 mrad （vertical）,respectively.