Chen Yujin, Huang Jianhua, Lin Yanfu, Gong Xinghong, Luo Zundu, Huang Yidong
Opt Lett. 2020 Mar 15;45(6):1575-1578. doi: 10.1364/OL.389873.
It is still a technical challenge to obtain a 1.55 µm passively $Q$Q-switched ${{\rm Er}^{3 + }}/{{\rm Yb}^{3 + }}$Er/Yb pulse laser with high energy and high repetition frequency, especially when it is end-pumped by a continuous-wave 0.98 µm diode laser. Benefitting from its long fluorescence lifetime of the $^4{{\rm I}_{13/2}}$I upper laser level and high thermal conductivity, ${\rm Er}:{\rm Yb}:{{\rm Lu}_2}{{\rm Si}_2}{{\rm O}_7}$Er:Yb:LuSiO crystal may be an excellent gain medium for realizing a high energy and high repetition frequency 1.55 µm pulse laser. At a continuous-wave absorbed pump power of 6.1 W, a 1537 nm pulse laser with energy of 45.5 µJ, repetition frequency of 1.32 kHz, and duration of 25 ns was first, to the best of our knowledge, realized in an ${\rm Er}:{\rm Yb}:{{\rm Lu}_2}{{\rm Si}_2}{{\rm O}_7}$Er:Yb:LuSiO crystal.
获得高能量、高重复频率的1.55μm被动调Q铒镱脉冲激光器仍然是一项技术挑战，尤其是当它由连续波0.98μm二极管激光器进行端面泵浦时。得益于其(^4I_{13/2})激光上能级的长荧光寿命和高导热性，掺铒镱硅酸镥（Er:Yb:Lu₂Si₂O₇）晶体可能是实现高能量、高重复频率1.55μm脉冲激光器的优良增益介质。据我们所知，在连续波吸收泵浦功率为6.1W时，首次在掺铒镱硅酸镥（Er:Yb:Lu₂Si₂O₇）晶体中实现了能量为45.5μJ、重复频率为1.32kHz、脉宽为25ns的1537nm脉冲激光器。
