Online reflectivity measurement of an ultra-weak fiber Bragg grating array

An online measurement method is introduced to ensure the reflectivity of an arbitrary grating in a large-scale ultra-weak fiber Bragg grating (FBG) array. The measurement errors were investigated by theoretical analysis and experiment. In the proposed method, the reflected spectrum of one single FBG...

Full description

Saved in:
Bibliographic Details
Published in:Measurement science & technology 2013-10, Vol.24 (10), p.105102-1-5
Main Authors: Luo, Zhihui, Wen, Hongqiao, Li, Xiaofu, Guo, Huiyong
Format: Article
Language:English
Subjects:
Arrays
Ethyl alcohol
Gratings (spectra)
Measurement methods
Noise levels
On-line systems
Online
online reflectivity measurement
optical time domain interrogation
Reflectivity
ultra-weak FBG array
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An online measurement method is introduced to ensure the reflectivity of an arbitrary grating in a large-scale ultra-weak fiber Bragg grating (FBG) array. The measurement errors were investigated by theoretical analysis and experiment. In the proposed method, the reflected spectrum of one single FBG was addressed and obtained from the grating array by time domain interrogation, and the FBG reflectivity was calculated by the reference of the end-face reflection in anhydrous ethanol. A measurement error of less than 0.5 dB and a 20 dB dynamic range were obtained in a larger-scale array of 1000 FBGs with an average peak reflectivity of −43 dB, which demonstrated the feasibility of this online measurement method.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/24/10/105102