用于高功率密度光束控制的光寻址光阀研制  

Development of optically addressed liquid crystal light valve for high power density beam control

作　　者：陈一波 沈浩 段佳著 乔冉[1] 曾建成[1] 李大鹏[1] 李玥颖 骆永全[1] 王海峰[1] 沈志学[1] 赵祥杰[1] 张大勇[1] Chen Yibo;Shen Hao;Duan Jiazhu;Qiao Ran;Zeng Jiancheng;Li Dapeng;Li Yueying;Luo Yongquan;Wang Haifeng;Shen Zhixue;Zhao Xiangjie;Zhang Dayong(Institute of Fluid Physics,CAEP,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2023年第4期130-136,共7页High Power Laser and Particle Beams

摘　　要：为解决光寻址液晶光阀在高功率密度光束控制领域的应用限制,介绍一种可用于高功率密度激光系统的光寻址液晶光阀,该光阀开关比不低于140∶1,可在高于2300 W/cm^(2)的连续激光系统中正常工作。同时,所研制的光阀可在高重频吉瓦(GW)级功率密度的fs脉冲激光系统中正常工作,在该系统最大功率密度激光作用下,光阀未见明显温度变化,该脉冲激光系统最大平均功率密度超过300 W/cm^(2)。As a beam control device,optically addressed liquid crystal light valve is easy to produce thermal effect due to absorption under the action of high-power density laser,resulting in damage to photoconductive materials,conductive films and liquid crystals.At the same time,thermal effect will also affect the uniformity of the device,reduce the extinction performance of the device.These factors limit the application of the device in laser processing,high power density laser shaping and other fields.To solve the application limitation of optically addressed liquid crystal light valve in the field of high power density beam control,an optically addressed liquid crystal light valve for high power density laser system is developed.The on/off ratio of the light valve is not less than 140∶1.It can work normally in the continuous laser system higher than 2300 W/cm^(2).At the same time,the light valve can work normally in the femtosecond pulse laser system with high repetition frequency gigawatt power density.Under the action of the maximum power density laser of the system,the light valve has no obvious temperature change.The maximum average power density of the pulse system exceeds 300 W/cm^(2).

关 键 词：光寻址液晶光阀 光束控制 高功率密度 连续激光 高开关比 

分 类 号：TN214[电子电信—物理电子学]