大孔径中波声光可调滤光器  

A Large Aperture Medium-wave Acousto-optic Tunable Filter

作　　者：张泽红[1] 王智林[1] 刘玲[1] 陈永峰[1] ZHANG Zehong;WANG Zhilin;LIU Ling;CHEN Yongfeng(The 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,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

出　　处：《压电与声光》2020年第4期477-480,共4页Piezoelectrics & Acoustooptics

摘　　要：介绍了一种采用氧化碲晶体做声光介质材料的大孔径中波(3~4.5μm)声光可调滤光器。通过优化设计,其通光孔径可达20 mm×20 mm,与常用声光可调滤光器(光孔径10 mm×10 mm)相比,其光通量提高了3倍。这种声光可调滤光器是针对入射o光进行设计的,其采用单片换能器结构。结果表明,通过优化设计,该大孔径中波声光可调滤光器实现了滤光范围为3.0~4.5μm,分离角为5.25°,衍射效率大于60%,光谱分辨率小于45 nm。In this paper,a large aperture medium-wave(3~4.5μm)acousto-optic tunable filter using tellurium oxide crystal as acousto-optic medium material is introduced in this paper.Through optimizing the design,its clear aperture has reached 20 mm×20 mm,and its luminous flux has increased by 3 times compared with the commonly used acousto-optic tunable filters(optical aperture 10 mm×10 mm).This acousto-optic tunable filter is designed for the incident o-light,which adopts a single-chip transducer structure.The results show that through design optimization,the filter achieves a filter range of 3.0~4.5μm,a separation angle of 5.25°,a diffraction efficiency of greater than 60%,and a spectral resolution of less than 45 nm.

关 键 词：声光可调滤光器 光波长 o光 衍射效率 

分 类 号：TN65[电子电信—电路与系统] TM23[一般工业技术—材料科学与工程]