反射相移对小腔长可调谐Fabry-Perot滤波器滤波特性的影响  

The effects of reflection phase shift on filtering performance of a tunable Fabry-Perot filter with a small cavity length

作　　者：丛蕊[1] 周晟[1] 陈刚[1] 蔡清元[1] 蒋林[1] 刘定权[1] CONG Rui;ZHOU Sheng;CHEN Gang;CAI Qing-Yuan;JIANG Lin;LIU Ding-Quan(Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China)

机构地区：[1]中国科学院上海技术物理研究所,上海200083

出　　处：《红外与毫米波学报》2021年第1期44-49,共6页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金(61705248,61805267);上海市自然科学基金(17ZR1434900);上海技术物理研究所创新项目(CX-76,CX-218)。

摘　　要：为具备尽量宽的波长调谐范围,可调谐Fabry-Perot滤波器(TFPF)作为分光器件应用于高光谱遥感时其腔长必须很小。不同于传统Fabry-Perot干涉仪,当TFPF的腔长与谐振波长相当时,其反射镜上的反射相移不可忽略。本文基于传输矩阵方法,在宽光谱范围内对介质反射镜的反射相移和TFPF的滤波特性进行了数值计算。结果显示,考虑反射相移后TFPF表现出更高的光谱分辨率,并且波长调谐范围被压缩。研究成果对面向高光谱遥感应用的TFPF的结构设计和波长校准具有指导意义。In order to obtain the widest wavelength tuning range,the cavity length of the tunable Fabry-Perot filter(TFPF)must be very small when used as a spectroscopic device in hyperspectral remote sensing.Differently from conventional Fabry–Perot interferometer,phase change occurring on reflection at each mirror can not be neglected when the cavity length is comparable with the resonant wavelength.In this paper,numerical calculations were carried out for the reflection phase shift on dielectric mirrors and filtering performance of TFPF in wide spectral range based on the Transfer-Matrix Method.Results show that TFPF exhibits higher spectral resolution and compressed wavelength tuning range after considering reflection phase shift.These research achievements can provide guidance for structure design and wavelength calibration of TFPF for hyperspectral remote sensing applications.

关 键 词：波长调谐范围 可调谐Fabry-Perot滤波器 高光谱遥感 反射相移 光谱分辨率 

分 类 号：O433[机械工程—光学工程]