A modified cross-correlation method for white-light optical fiber extrinsic Fabry-Perot interferometric hydrogen sensors

2009 ◽  
Author(s):  
Zhen Yang ◽  
Min Zhang ◽  
Yanbiao Liao ◽  
Shurong Lai ◽  
Qian Tian ◽  
...  
Keyword(s):  
Optical Fiber ◽  
White Light ◽  
Cross Correlation ◽  
Correlation Method ◽  
Hydrogen Sensors ◽  
Fabry Perot

Fitting Calculation of White-Light Interferometric Optical Fiber Fabry-Pérot Cavity

2012 ◽  
Vol 49 (5) ◽  
pp. 050602
Author(s):  
王为宇 Wang Weiyu ◽  
张敏 Zhang Min ◽  
谭峭峰 Tan Qiaofeng
Keyword(s):  
Optical Fiber ◽  
White Light ◽  
Fabry Perot

Signal-processing algorithm for white-light optical fiber extrinsic Fabry–Perot interferometric sensors

2004 ◽  
Vol 29 (15) ◽  
pp. 1736 ◽  
Author(s):  
Ming Han ◽  
Yan Zhang ◽  
Fabin Shen ◽  
Gary R. Pickrell ◽  
Anbo Wang
Keyword(s):  
Signal Processing ◽  
Optical Fiber ◽  
White Light ◽  
Processing Algorithm ◽  
Signal Processing Algorithm ◽  
Interferometric Sensors ◽  
Fabry Perot

scholarly journals Absolute Single Cavity Length Interrogation of Fiber-Optic Compound Fabry–Perot Pressure Sensors Through a White Light Non-Scanning Correlation Method

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1628 ◽  
Author(s):  
Zilong Guo ◽  
Wentao Lv ◽  
Wei Wang ◽  
Qingqing Chen ◽  
Xiongxing Zhang ◽  
...  
Keyword(s):  
Fourier Transform ◽  
White Light ◽  
Cavity Length ◽  
Fiber Optic ◽  
Pressure Sensors ◽  
Correlation Method ◽  
Air Cavity ◽  
Basal Cavity ◽  
Fabry Perot ◽  
Absolute Length

A white light non-scanning correlation interrogation system was proposed and built to interrogate absolute length of the air cavity of fiber-optic compound Fabry–Perot pressure sensors for the extraction of pressure value. By carefully choosing thickness range and tilt angle of the optical wedge used for cavity length matching, correlation interferometric signal of the basal cavity can be naturally filtered out. Based on peak positioning by Fourier transform, bandpass filtering in frequency domain, inverse Fourier transform back to time domain, envelope fitting and zero fringe finding through a gravity center method, cavity length can be determined with an accuracy of 0.04%. The system was used for the interrogation of a fiber-optic compound Fabry–Perot pressure sensor under different pressures. For a pressure range of 0.1~2.9 Mpa, the linear relationship between the air cavity length and the gas pressure imposed was successfully extracted.

Simple interrogator for optical fiber-based white light Fabry–Perot interferometers

2017 ◽  
Vol 42 (4) ◽  
pp. 727 ◽  
Author(s):  
Zhihao Yu ◽  
Zhipeng Tian ◽  
Anbo Wang
Keyword(s):  
Optical Fiber ◽  
White Light ◽  
Fabry Perot

scholarly journals Demodulation algorithm for optical fiber fabry-perot interference sensor

2021 ◽  
Vol 336 ◽  
pp. 04010
Author(s):  
Wenhua Wang ◽  
Weina Wu ◽  
Zhengye Xiong ◽  
Wenqing Shi ◽  
Yuanzheng Luo ◽  
...  
Keyword(s):  
Fourier Transform ◽  
High Resolution ◽  
Optical Fiber ◽  
Fast Fourier Transform ◽  
Osmotic Pressure ◽  
Continuous Improvement ◽  
Pressure Measurement ◽  
Cross Correlation ◽  
Fabry Perot

In view of resolution of optical fiber Fabry-Perot (FP) interference sensor, this paper analyses and researches high resolution demodulation algorithms including fast Fourier transform demodulation algorithm, cross-correlation calculation demodulation algorithm, vernier demodulation algorithm. Through continuous improvement, the vernier demodulation algorithm has achieved a resolution of 0.084nm. And it has a resolution of 2.3Pa when the vernier demodulation algorithm was applied to osmotic pressure measurement.

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