基于二硫化钨纳米材料的全固态脉冲激光器研究  

Research on all-solid-state pulsed laser based on tungsten disulfide nanomaterials

作　　者：孔春霞[1] 罗云 刘海洋 季晓炜 张雪 KONG Chun-xia;LUO Yun;LIU Hai-yang;JI Xiao-wei;ZHANG Xue(College of Environmental Science and Engineering,Nanjing University of Information Science & Technology,Nanjing 210044,China;College of Electronic and Information Engineering,Nanjing University of Information Science & Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学环境科学与工程学院,江苏南京210044 [2]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《激光与红外》2020年第7期815-820,共6页Laser & Infrared

基　　金：江苏省高等学校大学生创新创业训练计划项目(No.201810300046Z)资助。

摘　　要：采用锂离子-插层法制作了二硫化钨(Tungsten disulfide,WS2)纳米片溶液,经超声、离心、旋涂、烘干等流程制备了性能优良的WS2可饱和吸收体(Saturable Absorber,SA)。利用拉曼(Raman)和原子力显微镜(Atomic Force Microscope,AFM)法对WS2-SA进行系统表征分析,结果表明其表面薄膜具有少层片状二维结构。实验将WS2-SA应用于Nd∶YVO4全固态激光器中,获得了脉冲宽度为358 ns、重复频率为1.4 MHz、信噪比为39 dB、最大平均输出功率为570.4 mW的稳定脉冲激光输出。在120 min内,激光器平均输出功率的变化幅度低于5%。Tungsten disulfide(WS2)nanochip solution was produced by lithium-ion-inlayer method,and the high-performance WS2 saturable absorbent(SA)was prepared by ultrasonic,centrifugation,spin coating,drying and other processes.The systematic characterization of WS2-SA was carried out by using Raman and Atomic Force Microscope(AFM)method,and the results showed that the surface film had a small layer of flaky two-dimensional structure.The WS2-SA was applied to the Nd∶YVO4 all-solid-state laser,and a stable pulse laser output with a pulse width of 358 ns,a repetition rate of 1.4 MHz,a signal-to-noise ratio of 39 dB and a maximum average output power of 570.4 mW was obtained.Within 120 min,the average output power of the laser varies by less than 5%.

关 键 词：二硫化钨 被动调Q 全固态脉冲激光器 

分 类 号：TB383[一般工业技术—材料科学与工程]