基于氧化石墨烯与钙钛矿复合材料的被动调Q激光器  

Passive Q switched laser based on graphene oxide and perovskite composites

作　　者：程腾虎 戴腾飞 张晓颖 常建华[1,2] CHENG Teng-hu;DAI Teng-fei;ZHANG Xiao-ying;CHANG Jian-hua(School of Electronic and Information Engineering,Nanjing University of Information Science&Technology,Nanjing 210044,China;Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044 [2]南京信息工程大学江苏省大气环境与装备技术协同创新中心,江苏南京210044

出　　处：《激光与红外》2023年第10期1513-1519,共7页Laser & Infrared

基　　金：国家自然科学基金项目(No.61875089,No.62175114)资助。

摘　　要：卤化物钙钛矿独特的物理结构和电子结构,使其表现出了明显优于传统半导体材料的非线性光学性能。本文报道了氧化石墨烯与钙钛矿复合材料(GO&CH_(3)NH_(3)PbI_(3))作为可饱和吸收体(SA)在被动调Q激光器中的应用。实验表明,氧化石墨烯的超快电荷传输特性和钙钛矿的强电荷产生效率可以结合在一起。GO&CH3NH3PbI3复合材料表现出更强的饱和吸收性能。将GO&CH_(3)NH_(3)PbI_(3)SA插入Nd∶YVO_(4)全固态被动调Q激光器谐振腔内,实现了1064nm调Q脉冲的输出。当抽运功率增加到65W时,激光器平均输出功率为350mW。此时,激光器输出的调Q脉冲宽度为340ns,重复频率为1773kHz,射频信号信噪比为46dB。The unique physical and electronic structure of halide perovskite makes it exhibit nonlinear optical properties that are significantly better than traditional semiconductor materials.In this paper,the application of graphene oxide and perovskite composites(GO&CH_(3)NH_(3)PbI_(3))as saturable absorbers(SA)in passive Q switched lasers is reported.The experiments show that the ultrafast charge transport properties of GO and the high charge generation efficiency of perovskite could be combined.GO&CH_(3)NH_(3)PbI_(3) composites exhibit better saturation absorption.By inserting GO&CH_(3)NH_(3)PbI_(3) SA into the resonator of a Nd∶YVO_(4) all solid state passive Q switched laser,the output of 1064 nm Q switched pulse is realized.When the pumping power is increased to 6.5 W,the average output power of the laser is 350 mW.At this time,the output Q switched pulse width of the laser is 340 ns,the repetition frequency is 177.3 kHz and the signal to noise ratio of the RF signal is 46 dB.

关 键 词：氧化石墨烯 钙钛矿 被动调Q 全固态激光器 

分 类 号：O436[机械工程—光学工程]