A large capacity sensing network with identical weak fiber Bragg gratings multiplexing
A large capacity sensing network with identical weak fiber Bragg gratings multiplexing
复制标题
具有相同弱光纤布拉格光栅复用的大容量传感网络
DOI：
10.1016/j.optcom.2012.02.100
复制
发表时间：
2012-06-15
影响因子：
2.4
通讯作者：
Liu, Deming
中科院分区：
文献类型：
--
作者：
Zhang, Manliang;Sun, Qizhen;Liu, Deming
提出了一种基于全同弱光纤光栅的大复用容量准分布式光纤传感网络，并进行了理论分析和实验研究。其关键技术是“光波长时域反射（OWTDR）”解调技术，该技术利用了反射传感信号在时域和波长域的光功率变化。讨论了光纤光栅反射率、相邻光栅间距和延迟光纤传输损耗对传感系统复用能力的影响。分析结果表明，该传感方案可以有效地提高传感系统的复用容量高达1000。实现多点同步测量，降低信号解调成本。为了研究所提出的方案的性能，将9个布拉格波长为1536.651 nm、反射率为6%、带宽为0.07 nm的相同的弱布拉格光纤光栅串联写入。皇冠版权所有（C）2012由Elsevier B. V.出版。保留所有权利。
A quasi-distributed optical fiber sensing network with large multiplexing capacity, which is based on identical weak fiber Bragg gratings, is proposed, theoretically analyzed and experimentally studied. The key technique is the demodulation technology named "Optical wavelength time-domain reflection (OWTDR)," which utilizes the optical power variation of reflected sensing signal in both time domain and wavelength domain. The influence of reflectivity of fiber grating, interval between adjacent gratings and transmission loss of delay fiber on the multiplexing capacity of sensing system are discussed. Analyzed results demonstrate that this sensing scheme can effectively increase the multiplexing capacity of sensing system up to 1000. implement multi-point synchronous measurement and reduce the cost of signal demodulation. 9 Identical weak fiber Bragg gratings with the same Bragg wavelength of 1536.651 nm, reflectivity of 6%, bandwidth of 0.07 nm are written in series to investigate the performance of the proposed scheme. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.