定量水直接吸收法测量激光能量可行性分析  

Feasibility Analysis of Laser Energy Meter Using Fixed Mass Water Absorption

作　　者：方波浪[1] 韩静 王大辉[1] 冯刚[1] 陶波[1] 王振宝[1] 王建国[1] FANG Bolang;HAN Jing;WANG Dahui;FENG Gang;TAO Bo;WANG Zhenbao;WANG Jianguo(Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]西北核技术研究所,西安710024

出　　处：《现代应用物理》2022年第4期8-12,共5页Modern Applied Physics

基　　金：激光与物质相互作用国家重点实验室基金资助项目(SKLLIM1909)。

摘　　要：针对近红外强激光能量高精度测量需求,提出了定量水直接吸收法,采用定质量的水作为吸收体,通过激光辐照前后水温的变化获得激光能量。为验证该方法的可行性,建立了类比电路模型,分析了入射激光能量和隔热层热阻对温差的影响规律。研究结果表明:入射激光总能量与温度变化之间存在显著的线性关系;采用温度曲线下降沿拟合的数据处理方法能降低隔热热阻对测量结果的影响。因此,定量水直接吸收激光能量测量方法有望实现近红外高能激光能量的高精度测量。In this paper,a new technology termed as laser energy meter using fixed mass water absorption is proposed.This laser energy meter uses fixed mass water isolated from environment as absorption media,and the total injection laser energy is obtained through the changes of water temperature before and after laser irradiation.The feasibility of quantitative water direct absorption method is theoretically simulated and analyzed.The results show that there is a significant linear relationship between the total incident laser energy and the temperature variation.The data processing method of fitting the falling edge of temperature curve can reduce the influence of thermal insulation resistance on the measurement results.Thus,the proposed laser energy meter is expected to realize high precision measurement of near infrared high energy laser.

关 键 词：高能激光 近红外激光 能量计 水吸收 

分 类 号：O439[机械工程—光学工程] TN247[理学—光学]