【作者】 苏良碧； 徐军； 张丹； 薛迎红； 王清月； 柴路； 杜鹃； 梁晓燕；

【Author】 SU Liang-bi~1 XU Jun~1 ZHANG Dan~1 XUE Ying-hong~2 WANG Qing-yue~2 CHAI Lu~2 DU Juan~1 LIANG Xiao-yan~1 1 Shanghai Institute of Optics and Fine Mechanics,The Chinese Academy of Sciences,Shanghai 201800,China 2 School of Precision Instruments & Optoelectronics Engineering,Keg Laboratory at Optoelectronic Information Technical Science,Chinese Ministry of Education.University of Tianjin,Tianjin 300072,China

【机构】 中国科学院上海光学精密机械研究所； 天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室；

【摘要】 研究了一种新型激光晶体 Na^-,Yb³⁺：CaF₂在激光二极管抽运下的激光性能。陔晶体仅以自调 Q 方式运转,激光波长为1．05 μm,最低抽运吸收阈值功率仪30mW,功率密度为0．60kW/cm²。当输入功率接近5W 时, 脉冲宽度稳定在1．5μs,相应的重复频率为28 kHz。采用半导体可饱和吸收镜对 Na^-,Yb³⁺：CaF₂晶体进行被动锁模,获得自调 Q 被动锁模激光脉冲。单束输出功率为180 mW,自调 Q 脉宽为7 μs,重复频率为5．2 kHz,其包络下的锁模超短激光脉冲的变换极限脉冲宽度为1 ps,重复频率为183 MHz,对应脉冲峰值功率为27 kW。更多还原

【Abstract】 Laser performances of a new Na⁺.Yb³⁺:CaF₂ crystal under laser diode pumping were demonstrated.This crystal only operated in the self-Q-switched scheme,with laser wavelength of 1.05μm,and minimum pump absorbed power of 30 mW corresponding to power density of 0.60 kW/cm².On 5 W incident power,the repetition rate and width of the self-Q-switched pulses reached 28 kHz and 1.5μs,respectively.By using a semiconductor saturable absorber mirror （SESAM）,simultaneous transform- limited 1 ps passively mode-locked pulses,with the average output power of one laser beam 180 mW and the repetition rate of 183 MHz,were obtained under the self-Q-switched envelope induced by the laser medium.The corresponding pulse peak power arrived at 27 kW,indicating the promising application of Yb³⁺ Na⁺-codoped CaF₂ crystals in achieving ultra-short pulses and high pulse peak power.更多还原