Fast interrogation of dynamic fiber Bragg grating using neighborhood average algorithm

被引：5
|
作者：
Mao, Xuefeng [1 ]
Zhou, Xiao [1 ]
Ye, Hao [1 ]
Tan, Yuting [1 ]
Luo, Yuan [1 ]
机构：
[1] Chongqing Univ Posts & Telecommun, Sch Optoelect Engn, Chongqing 400065, Peoples R China
来源：
INFRARED PHYSICS & TECHNOLOGY | 2023年 / 128卷
基金：
中国博士后科学基金;
关键词：
Fiber Bragg grating; Fiber sensor; Demodulation algorithm; OPTIC SENSORS;
D O I：
10.1016/j.infrared.2022.104490
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A fast interrogation scheme for dynamic fiber Bragg grating (FBG) based on a swept laser is presented. A neighborhood average algorithm, meanwhile, is used to real-time and fast demodulate the Bragg wavelength. In this paper, the resolution of the system using neighborhood average algorithm is tested, and the dynamic interrogation of the system is verified using vibration signals. The proposed algorithm achieves a Bragg wave-length resolution of 0.11 pm when the laser scanning frequency is 40 kHz. The stability of the algorithm is compared with Buneman wavelength estimation algorithm. Compared with other commonly used FBG peak search algorithms, the new algorithm has the characteristics of low computational cost, high sensitivity and stability.
引用
收藏
页数：5
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