基于FPGA的多通道高速光纤光栅解调系统  

Multichannel High-speed White-light Interferometric Interrogation System for FBG-based on FPGA

作　　者：张爽爽 申雅峰[1] ZHANG Shuangshuang;SHEN Yafeng(Changche ng Institute of Metrology&Measuremnent,Beijing 100095,China)

机构地区：[1]航空工业北京长城计量测试技术研究所,北京100095

出　　处：《计测技术》2020年第2期43-47,共5页Metrology & Measurement Technology

摘　　要：研发了一种基于波长扫描光源和嵌入式解调的多通道高速光纤布拉格光栅解调系统。该系统采用半导体光放大器(SOA)结合可调谐F-P滤波器产生频率为1 kHz的稳定波长扫描光。通过使用对称三角波技术和快速FPGA解调算法,系统最终能够同时实现16个通道以及2 kHz的解调速率,测量范围80 nm。A multichannel high-speed FBG sensor interrogation system based on wavelength-scanning fiber laser and field programmable gate array(FPGA) is developed.The system utilizes a semiconductor optical amplifier(SOA) and a fiber Fabry-Perot tunable filter(FFP-TF) to generate a wavelength-scanning fiber laser with a sweep rate of 1 kHz.By combining the symmetric triangularwaveform technique and the fast FPGA-based signal processing algorithm,the FBG interrogation system realizes a demodulation speed of 2 kHz and a multiplexing performance of 16 channels simultaneously.In addition,the interrogation wavelength-range can reach 80 nm.

关 键 词：光纤光栅 高速解调系统 FPGA 

分 类 号：TB96[机械工程—光学工程] TP212[一般工业技术—计量学]