Tu Wei, Chen Ying, Zong Nan, Liu Ke, Wang Zhi-Min, Zhang Feng-Feng, Zhang Shen-Jin, Yang Feng, Yuan Lei, Bo Yong, Peng Qin-Jun, Cui Da-Fu, Xu Zu-Yan
Appl Opt. 2015 Apr 10;54(11):3389-92. doi: 10.1364/AO.54.003389.
A high average power 1342 nm passively CW mode-locked picoseconds (ps) composite Nd:YVO4 laser was demonstrated with a semiconductor saturable absorber mirror (SESAM). The oscillator cavity was carefully designed to optimize the laser beam radii in the crystal and on the SESAM. The combination of composite bonded laser crystal, direct pumping, and dual end-pumped configuration was adopted to reduce the thermal effect and produce high output power with high beam quality. A maximum average output power of 7.63 W was obtained with a repetition rate of 77 MHz and a pulse duration of 24.2 ps under an absorbed pump power of 38.6 W, corresponding to an optical-optical efficiency of 19.7% and a slope efficiency of 25.9%, respectively. The beam quality factor M(2) was measured to be 1.49.
利用半导体可饱和吸收镜（SESAM）演示了一台高平均功率1342纳米被动连续波锁模皮秒（ps）复合Nd:YVO4激光器。对振荡器腔进行了精心设计，以优化晶体中和SESAM上的激光束半径。采用复合键合激光晶体、直接泵浦和双端泵浦配置相结合的方式，以降低热效应并产生具有高光束质量的高输出功率。在38.6瓦的吸收泵浦功率下，获得了7.63瓦的最大平均输出功率，重复频率为77兆赫兹，脉冲持续时间为24.2皮秒，对应的光光效率分别为19.7%，斜率效率为25.9%。测得光束质量因子M(2)为1.49。
