The effects of reflection phase shift on filtering performance of a tunable Fabry-Perot filter with a small cavity length
Received:April 21, 2020  Revised:December 18, 2020  download
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Author NameAffiliationE-mail
CONG Rui Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China congrui@ucas.ac.cn 
ZHOU Sheng Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China zhousheng@mail.sitp.ac.cn 
CHEN Gang Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China gangchen@mail.sitp.ac.cn 
CAI Qing-Yuan Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China qycai@mail.sitp.ac.cn 
JIANG Lin Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China jianglin@mail.sitp.ac.cn 
LIU Ding-Quan Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China dqliu@mail.sitp.ac.cn 
Abstract: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.
keywords:wavelength tuning range  tunable Fabry-Perot filter  hyperspectral remote sensing  reflection phase shift  spectral resolution
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