石墨烯实现Nd:YVO_4激光器1064nm和1342nm双波长被动调Q  

Graphene Passively Q-Switching for Dual-Wavelength Lasers at 1064nm and 1342nm in Nd…YVO_4 laser

作　　者：梁莉[1] 林正怀[1] 陈狮[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：《中国激光》2014年第4期45-48,共4页Chinese Journal of Lasers

基　　金：福建省自然科学基金(2012J01277)

摘　　要：在激光二极管端面抽运的三腔复合镜Nd…YVO4双波长激光器中,通过合理配置两个支腔腔长和输出镜透射率,采用石墨烯分散液作为可饱和吸收体,实现1064nm和1342nm双波长激光被动调Q。当1064nm支腔透射率为20%时,获得脉宽为10.8ns的1064nm脉冲和脉宽为12.5ns的1342nm脉冲,1064nm脉冲在前,两脉冲峰值的时间间隔为16ns;当1064nm支腔透射率为25%时,获得脉宽为11.3ns的1064nm脉冲和脉宽为14.2ns的1342nm脉冲,1342nm脉冲在前,两脉冲峰值的时间间隔为19ns。根据双波长谱线竞争理论和石墨烯对1064nm和1342nm激光的可饱和吸收特性,对上述实验结果给予了合理的理论解释。Passively Q-switching of dual-wavelength lasers at 1064 nm and 1342 nm is realized in a laser doide （LD） end-pumped three-mirror compound resonator Nd YVO4 laser using graphene dispersion as the saturable absorber, by setting the cavity lengths and the output mirror transmissivities of two branch cavity appropriatly. When the transmissivity of 1064 nm branch cavity is 20%, both 1064 nm pulse with 10.8 ns duration and 1342 nm pulse with 12.5 ns duration are achieved, and the 1064 nm pulse is in the front, the time interval between two pulses is 16 ns. Both 1064nm pulse with 11. 3 ns duration and 1342 nm pulse with 14. 2 ns duration are achieved when the transmissivity of 1064 nm branch cavity is 25%, and 1342 nm pulse is in the front, the time interval between two pulses is 19 ns. A reasonable theoretical explanation is given to the above-mentioned experiment according to dual- wavelength line competition and the saturable absorption of grephene in 1064 nm and 1342 nm lasers.

关 键 词：激光器 双波长激光脉冲 石墨烯分散液 ND:YVO4激光器 被动调Q 

分 类 号：TN248.1[电子电信—物理电子学]