2.7μm声光调Q器件  

2.7 μm Acousto-Optic Q-Switched Device

作　　者：张泽红[1] 陈国[2] 何晓亮[1] 王晓新[1] ZHANG Zehong;CHEN Guo;HE Xiaoliang;WANG Xiaoxin(The 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,China;The 11th Institute of China Electronics Technology Group Corporation,Beijing 100015,China)

机构地区：[1]中国电子科技集团公司第二十六研究所,重庆400060 [2]中国电子科技集团公司第十一研究所,北京100015

出　　处：《压电与声光》2022年第6期865-867,共3页Piezoelectrics & Acoustooptics

摘　　要：该文介绍了一种损伤阈值较高的2.7μm声光调Q器件,比较分析了几种常用的近红外声光材料,优选铌酸锂晶体做调Q器件的声光介质材料,它能较好地兼顾衍射效率、光学性能及抗激光损伤能力。该文还分析了激光腔Q值与衍射效率的关系,通过优化衍射效率的分布,达到降低驱动功率、提高关断能力的目的。用铌酸锂晶体制作的2.7μm声光调Q器件,其工作波长为2.7~2.8μm,工作频率为40.68 MHz,光孔径为3 mm,通光孔中心部位衍射效率可达75%。与氧化碲制作的声光调Q器件相比,铌酸锂晶体制作的2.7μm声光调Q器件的抗激光损伤能力较高。This paper introduces a 2.7 μm acousto-optic Q-switched device with high damage threshold. With comparison and analysis of several commonly used near-infrared acousto-optic materials, the lithium niobate crystal is a preferred medium material for the Q-switched device, which can provide suitable compromise among diffraction efficiency, optical performance, and resistance to laser damage. This paper also analyzes the relationship between Q value of the laser cavity and the diffraction efficiency. The purpose of reducing the driving power and improving the turn-off capability is achieved by optimizing the distribution of diffraction efficiency. This 2.7 μm acousto-optic Q-switched device made of lithium niobate crystal has an operating wavelength from 2.7 μm to 2.8 μm, an operating frequency of 40.68 MHz, an optical aperture of 3 mm, and a diffraction efficiency of 75% at the center part of the through hole. Compared with the acousto-optic Q-switched device made of tellurium oxide, the 2.7 μm acousto-optic Q-switched device made of lithium niobate crystal has higher laser damage resistance.

关 键 词：2.7μm激光 声光Q开关 铌酸锂晶体 衍射效率 氧化碲 

分 类 号：TN248.1[电子电信—物理电子学] O426.3[理学—声学]