宽谱平面阵列激光器的设计与实现  

Design and fabrication of wide-spectrum diode array

作　　者：闫立华[1] 程义涛[1] 张厚博 YAN Li-hua;CHENG Yi-tao;ZHANG Hou-bo(The 13th Research Institute of CETC,Shijiazhuang 050057,China)

机构地区：[1]中国电子科技集团公司第十三研究所,河北石家庄050057

出　　处：《激光与红外》2023年第7期1037-1042,共6页Laser & Infrared

基　　金：国家重点研发计划项目(No.2020YFB1805903)资助。

摘　　要：在二极管泵浦的固体激光器中,由于泵源的输出波长具有温漂特性,造成了与激光晶体吸收光谱的匹配性问题,使得泵浦效率降低,影响固体激光器的输出能量。为了避免该影响,项目组采用拓宽发射光谱覆盖范围的设计思路,开展了宽光谱平面阵列的研制工作。本文分别完成了6芯平面阵列的建模、阵列中心波长的设计、以及基于高斯光谱模型的双波长叠加的仿真工作;同时采用(2.0 nm、2.4 nm、2.8 nm、3.2 nm)四个波长间隔的芯片进行了实验验证。结果表明:在波长间隔为2.0 nm和2.4 nm时,叠加后光谱呈现单一峰状态;在波长间隔为2.8 nm和3.2 nm时,叠加光谱呈现峰谷分布,相应峰谷比的测试值分别为1.03和1.14,设计仿真与实验结果基本一致。本文为宽光谱阵列激光器非温控泵浦结构的量化计算提供了思路。In diode-pumped solid-state lasers,the matching degree between the output wavelength of the pump source and the absorption spectrum of the laser crystal is caused by the thermal drift characteristic,which reduces the pumping efficiency and affects the laser output energy.In order to avoid this influence,the project team adopted the design idea of broadening the coverage range of emission spectrum,and carried out the wide-spectrum diode array.This paper completed the modeling of 6-chips planar array,the design and simulation of array center wavelength,and the design and simulation of dual-wavelength superposition based on Gaussian spectral model.At the same time,the chip with four wavelength intervals of 2.0 nm,2.4 nm,2.8 nm and 3.2 nm was verified experimentally.The results show that when the wavelength interval is 2.0 nm and 2.4 nm,the spectra shows one single peak after superposition.When the wavelength spacing is 2.8 nm and 3.2 nm,the spectra after superposition shows peak-valley distribution,and the corresponding peak-valley ratio test values are 1.03 and 1.14,respectively.The design simulation results are basically consistent with the experimental results.This paper provides an idea for the quantitative calculation of the non-temperature controlled pump structure of a wide spectrum array laser.

关 键 词：激光阵列 波长叠加 热仿真 宽温工作 峰谷比 

分 类 号：TN248[电子电信—物理电子学]