Conduction cooled narrow linewidth sub-nanosecond multi-beam laser  

作　　者：CHENG Yong TAN Chaoyong LIU Xu CHEN Xia ZHU Mengzhen WEI Jingsong 程勇;谭朝勇;刘旭;陈霞;朱孟真;魏靖松(Ordnance NCO Academy,Army Engineering University,Wuhan 430075,China)

机构地区：[1]Ordnance NCO Academy,Army Engineering University,Wuhan 430075,China

出　　处：《Optoelectronics Letters》2021年第9期518-522,共5页光电子快报（英文版）

基　　金：supported by the National Science and Technology Major Project of China(No.2014ZX01005-101-003);the National Natural Science Foundation of China(No.61705268);the Science and Technology Innovation Project of Army Engineering University(No.KYWHJQZL2002)。

摘　　要：A conduction cooled high peak power,narrow linewidth,and sub-nanosecond multi-beam laser as an excellent candidate for non-scanning lidar is demonstrated.This laser is based on master oscillator power amplifier(MOPA)scheme which consists of a pulse pumped Nd:YAG/Cr4+:YAG microchip laser as the master oscillator and a high efficient grazing incidence Nd:YVO4 slab amplifier,and the output beam is expanded to 100 mm diameter by a 50×low aberration Galileo beam expander and then divided into a 50×2 staggered arrangement multi-beam array by a diffractive laser splitter.The laser operates at 1064.28 nm with a spectral linewidth about 20 pm,which generates 1 m J,0.78 ns pulses at 7 k Hz rate.The fluctuation of output power is less than±2%when it works continuously for 1 h.The energy uniformity of the 100 sub-beams is up to 90%,the divergence of each sub-beam is about 20μrad,and the total transmission efficiency of the diffractive laser splitter is more than 85%.

关 键 词：ND:YAG AMPLIFIER PUMPED 

分 类 号：TN248[电子电信—物理电子学]