| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4956980 | Optical Fiber Technology | 2017 | 5 Pages |
Abstract
In this paper, a strain sensing system based on Distributed-Feedback (DFB) laser array and a high effective demodulate algorithm is proposed. The uniqueness and innovation of the algorithm is in the following two aspects: one is that accurate demodulation can be achieved by scanning only 0.4Â nm bandwidth of fiber Bragg grating (FBG) spectrum instead of relying on scanning FBG's principal power peak; and the other is that the scanned spectrum can be any part of reflected spectrum of FBG sensor, which make it possible of using wavelength-division multiplexing (WDM) for FBG sensing network. In the experiment, DFB laser array with single-channel and four-channel are used to demonstrate the proposed algorithm. Experiments results show that the single-channel's error is below 5Â pm, four-channel's is below 2Â pm, strain and algorithm results show good linearity.
Keywords
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Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Yi Ni, Xuanyi Qin, Huixuan Yao, Yu Guo, Xiangfei Chen,