Signal Demodulation Algorithm for Interference Spectrum of Fabry-Perot Cavity with Stainless Steel Diaphragm

被引：1

作者：

Wang, Wenhua ^{[1
]}

Zhou, Xinlei ^{[2
]}

Yu, Qingxu ^{[2
]}

Shi, Wenqing ^{[1
]}

Xiong, Zhengye ^{[1
]}

Wu, Weina ^{[3
]}

Tian, Xiuyun ^{[1
]}

Fei, Xianxiang ^{[1
]}

机构：

[1] Guangdong Ocean Univ, Sch Elect & Informat Engn, Zhanjiang, Peoples R China

[2] Dalian Univ Technol, Sch Optoelect Engn & Instrumentat Sci, Dalian, Peoples R China

[3] Guangdong Ocean Univ, Sch Math & Comp, Zhanjiang, Peoples R China

来源：

2021 IEEE INTERNATIONAL CONFERENCE ON INFORMATION COMMUNICATION AND SOFTWARE ENGINEERING (ICICSE 2021) | 2021年

关键词：

demodulation algorithm; FFT; minimum mean square error; vernier demodulation; Fabry-Perot cavity; PRESSURE SENSOR;

D O I：

10.1109/ICICSE52190.2021.9404083

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

In order to improve the resolution and the measurement accuracy of optical fiber sensor based on Fabry-Perot (FP) interference, the demodulation algorithm for the FP interference spectrum is analyzed in this paper. Signal demodulation algorithm directly affects the performance of the FP sensor, such as resolution and measurement accuracy. Combined with the basic structure of the sensor, a high-resolution vernier demodulation algorithm is studied based on fast Fourier transform (FFT) algorithm and minimum mean square error algorithm, which has a resolution of 0.084nm according to the experimental results. Then, the demodulation algorithm is applied to the FP interference optical fiber pressure sensor with stainless steel diaphragm. The test results show that the performance is good in the range of 0-1MPa with the resolution of 2.10x10(-4)MPa and correlation coefficient of 0.99989.

引用

页码：175 / 178

页数：4

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