Field-programmable gate array-based large-capacity sensing network with 1642 ultra-weak fiber Bragg gratings  

作　　者：王治 文泓桥 胡宸源 白巍 戴玉堂 

机构地区：[1]National Engineering Laboratory for Fiber Optic Sensing Technology,Wuhan University of Technology [2]Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education,Wuhan University of Technology

出　　处：《Chinese Optics Letters》2016年第1期45-48,共4页中国光学快报（英文版）

摘　　要：A field-programmable gate array （FPGA）-based large-capacity sensing network with ultra-weak fiber Bragg gratings （FBGs） is proposed and experimentally studied. The demodulation system is constructed to interrogate 1642 serial time-division-multiplexing FBGs with a peak refleetivity of about -40 dB and equal separations of 2.5 m. Two semiconductor optical amplifiers and an InGaAs linear sensor array controlled by an FPGA are introduced to the demodulation system to achieve fast, precise, and flexible interrogation. The low crosstalk and spectral distortion axe investigated through both theoretical analysis and experiments.A field-programmable gate array （FPGA）-based large-capacity sensing network with ultra-weak fiber Bragg gratings （FBGs） is proposed and experimentally studied. The demodulation system is constructed to interrogate 1642 serial time-division-multiplexing FBGs with a peak refleetivity of about -40 dB and equal separations of 2.5 m. Two semiconductor optical amplifiers and an InGaAs linear sensor array controlled by an FPGA are introduced to the demodulation system to achieve fast, precise, and flexible interrogation. The low crosstalk and spectral distortion axe investigated through both theoretical analysis and experiments.

关 键 词：Bragg gratings DEMODULATION Fiber Bragg gratings Light amplifiers Logic gates Optical variables measurement Reconfigurable hardware Semiconductor optical amplifiers Time division multiplexing 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置] TN929.11[自动化与计算机技术—控制科学与工程]