石墨烯实现Nd:YVO_4激光器1064nm和1342nm激光的被动调Q  

Passively Q-switched Nd:YVO_4 Laser at 1064 nm and 1342 nm Using Graphene as Saturbale Absorber

作　　者：陈狮[1] 林正怀[1] 梁莉[1] 王加贤[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《量子光学学报》2013年第4期367-372,共6页Journal of Quantum Optics

基　　金：福建省自然科学基金(编号2012J1277)

摘　　要：在激光二极管(LD)泵浦的Nd:YVO4激光器中,采用石墨烯分散液作为可饱和吸收体,分别实现1064nm和1342nm激光的被动调Q;获得平均输出功率为0.52 W,脉宽为7.7ns,重复频率为105kHz的1342nm调Q脉冲序列和平均输出功率为0.62 W,脉宽为6.06ns,重复频率为138kHz的1064nm调Q脉冲序列。测量石墨烯分散液对低功率连续激光的吸收系数与入射功率之间的关系,结果表明样品对1342nm和1064nm激光均存在可饱和吸收,但是对1342nm激光吸收的饱和光强较低,由此分析1064nm和1342nm调Q脉冲的差别。Passive Q-switching of a diode pumped Nd：YVO4 laser at 1064nm and 1342nm were realized respectively by using graphene dispersion liquid as a saturable absorber.The 1342nm pulse train with 7.7 ns pulses duration,0.52 Waverage power and 105kHz repetition rate and the 1064nm pulse train with 6.06ns pulse duration,0.62 W average power and 138kHz repetition rate were achieved respectively.The absorption coefficients of the graphene dispersion liquid for 1064nm and 1342nm at the different input power of CW laser were measured.The results indicated that graphene dispersion liquid achieved absorption saturation at 1342nm and 1064nm laser,but saturation intensity at 1342nm was lower than at 1064nm,thus the differences of Q-switched laser pulses between 1342nm and 1064nm was analyzed.

关 键 词：石墨烯 被动调Q ND YVO4激光器 

分 类 号：O431[机械工程—光学工程]