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Optical Engineering

Interrogation system for a sensor array with 1310-nm band ultra-weak fiber Bragg gratings
Author(s): Zhihui Luo; Huiyong Guo; Hongqiao Wen
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Paper Abstract

An interrogation system for the time-division multiplexed sensor array based on 1310-nm band ultra-weak fiber Bragg gratings (FBGs) was proposed in this study. Power spectral density was introduced to budget the optical power and evaluate the interrogation capability of the proposed system. The proposed system consists of one tunable laser and two semiconductor optical amplifiers, where the former scans the wavelength, and the latter modulates the light and separates the reflected pulses from different FBGs through delayed switching. Up to 1000 serial FBGs, with a peak reflectivity of −40 to −45  dB and a spatial resolution of 5 m along an optical fiber, were interrogated to demonstrate the feasibility of the interrogation system.

Paper Details

Date Published: 3 October 2013
PDF: 7 pages
Opt. Eng. 52(10) 107101 doi: 10.1117/1.OE.52.10.107101
Published in: Optical Engineering Volume 52, Issue 10
Show Author Affiliations
Zhihui Luo, Wuhan Univ. of Technology (China)
Huiyong Guo, Wuhan Univ. of Technology (China)
Hongqiao Wen, Wuhan Univ. of Technology (China)

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