Fast interrogation of dynamic low‐finesse Fabry‐Perot interferometers: A review
Sign Up to like & getrecommendations! Published in 2021 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32922
Abstract: Low‐finesse fiber‐optic Fabry–Perot (F‐P) interferometric sensor has the advantages of high sensitivity, anti‐electromagnetic interference, and compact size, and is one of the most widely used optical fiber sensors. With the development of sensor design and… read more here.
Keywords: demodulation; fast interrogation; dynamic low; low finesse ... See more keywords
Demodulation spectrum analysis for multi-fault diagnosis of rolling bearing via chirplet path pursuit
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Central South University"
DOI: 10.1007/s11771-019-4184-6
Abstract: The vibration signals of multi-fault rolling bearings under nonstationary conditions are characterized by intricate modulation features, making it difficult to identify the fault characteristic frequency. To remove the time-varying behavior caused by speed fluctuation, the… read more here.
Keywords: demodulation spectrum; via chirplet; path pursuit; multi fault ... See more keywords
Fast demodulation algorithm for multi-wavelength LED frequency-division modulation transmission hyperspectral imaging
Sign Up to like & getrecommendations! Published in 2020 at "Optik"
DOI: 10.1016/j.ijleo.2019.163110
Abstract: Abstract Transmission hyperspectral imaging (THI) has the potential for medical applications. The defect of low signal-to-noise ratio (SNR) resulting from strong absorption of biological tissues can be improved by combining frame accumulation with shape function… read more here.
Keywords: hyperspectral imaging; demodulation algorithm; transmission hyperspectral; fast demodulation ... See more keywords
Dual-channel edge characteristic analysis of all-fiber structure based on micro-ring resonator in wavelength demodulation system
Sign Up to like & getrecommendations! Published in 2020 at "Optik"
DOI: 10.1016/j.ijleo.2020.165420
Abstract: Abstract We present an all-fiber dual-channel edge demodulation structure consisting of a micro-ring resonator and an asymmetric M–Z interferometer. In order to achieve dual-channel edge detection, the characteristics of the wavelength demodulation system of fiber… read more here.
Keywords: channel edge; wavelength demodulation; micro ring; dual channel ... See more keywords
Dual demodulation interferometer with two-wave mixing in GaAs photorefractive crystal
Sign Up to like & getrecommendations! Published in 2018 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2018.02.009
Abstract: Abstract A dual demodulation interferometer with two-wave mixing (TWM) in the GaAs photorefractive crystal (PRC) is proposed and experimentally demonstrated. The GaAs PRC has tiny temperature change under high voltage thus not requiring thermoelectric cooler… read more here.
Keywords: interferometer two; gaas; interferometer; dual demodulation ... See more keywords
A novel high accuracy optical path difference compensation method based on phase difference technology
Sign Up to like & getrecommendations! Published in 2021 at "Optics and Lasers in Engineering"
DOI: 10.1016/j.optlaseng.2020.106367
Abstract: Abstract A novel method, which is based on the phase difference between the filtered spectrum and simulated spectrum, is proposed to compensate for the optical path difference (OPD) demodulation error of the interferometer sensors. With… read more here.
Keywords: demodulation; accuracy; method; phase difference ... See more keywords
Hilbert square demodulation and error mitigation of the measured nonlinear structural dynamic response
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2021.107935
Abstract: Abstract The Hilbert square demodulation is a useful tool for the measured dynamic response analysis. However, if the Bedrosian theorem is violated for the measured response, it causes significant error in the demodulation process. Thus,… read more here.
Keywords: dynamic response; response; demodulation; hilbert ... See more keywords
Radio-over-Fiber signal demodulation in the presence of non-Gaussian distortions based on subregion constellation processing
Sign Up to like & getrecommendations! Published in 2019 at "Optical Fiber Technology"
DOI: 10.1016/j.yofte.2019.102062
Abstract: Abstract Subregion constellation processing as a demodulation method improves noise tolerance and system error performance when the optical channel presents non-Gaussian distortions, common in optical-wireless communications systems. The proposed method consists of: first, grouping in… read more here.
Keywords: non gaussian; constellation processing; constellation; subregion constellation ... See more keywords
Enhanced cognitive demodulation with artificial intelligence
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-77262-0
Abstract: The low-cost ‘THz Torch’ wireless link technology is still in its infancy. Until very recently, inherent limitations with available hardware has resulted in a modest operational figure of merit performance (Range \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts}… read more here.
Keywords: enhanced cognitive; usepackage; cognitive demodulation; bit rate ... See more keywords
An Adaptive Generalized Demodulation Method for Multimedia Spectrum Analysis is Applied in Rolling Bearing Fault Diagnosis
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.2969461
Abstract: Research into rolling bearing fault diagnosis methods is of great significance because rolling bearings are a key part of mechanical equipment. The effect of iterative generalized demodulation (IGD) on the demodulation of the fundamental frequency… read more here.
Keywords: rolling bearing; demodulation; frequency; fault diagnosis ... See more keywords
Mach-Zehnder Interferometer Sensor Curvature Demodulation Method Based on the Orthogonal Decomposition of Spectral Curves
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.2973405
Abstract: This paper proposes a curvature demodulation of Mach-Zehnder interferometer (MZI) sensors based on complete spectral information. An MZI sensor composed of two waist-enlarged single mode fibers (SMFs) was fabricated. To research the spectral characteristics of… read more here.
Keywords: spectral information; demodulation method; decomposition; demodulation ... See more keywords