Self-referenced intensity-based fiber optic sensor system using fiber Bragg gratings

Yu-Lung Lo, Ting Yang Yan, Chih Ping Kuo

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We present a method for measuring the intensity variation regarding the measured physical attributes of intensity-based fiber Bragg grating sensors. These sensors can be configured for multiplexing, thermal insensitivity, and immunity to noise from the light source and/or the lead-in/out fibers caused by the external load. To achieve these goals, the intensity-based optical fiber sensor is implemented between a pair of fiber Bragg gratings. Based on the ratio or dBm difference from the two reflecting intensities of the reference and the sensing fiber Bragg gratings, the appropriate measurable parameters associated with the intensity variations can be detected. Different from transmission type intensity-based sensors, a reflective type based on a pair of fiber Bragg gratings in introduced. To validate the proposed method, a transducer made by using an etched-cladding fiber is deposited onto the metal thin film for sensing metal corrosion. Based on the evanescent field of a fiber and a pair of fiber Bragg gratings, multiple embedded corrosion sensors could be designed for civil structural health monitoring. Also, the proposed method could be applied to a biosensing design on a transducer.

Original languageEnglish
Pages (from-to)1087-1092
Number of pages6
JournalOptical Engineering
Volume41
Issue number5
DOIs
Publication statusPublished - 2002 May 1

Fingerprint

Fiber optic sensors
Fiber Bragg gratings
Bragg gratings
fiber optics
fibers
sensors
Sensors
Fibers
Transducers
Corrosion
Evanescent fields
Structural health monitoring
corrosion
transducers
Multiplexing
Light sources
structural health monitoring
immunity
Thin films
multiplexing

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Lo, Yu-Lung ; Yan, Ting Yang ; Kuo, Chih Ping. / Self-referenced intensity-based fiber optic sensor system using fiber Bragg gratings. In: Optical Engineering. 2002 ; Vol. 41, No. 5. pp. 1087-1092.
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Self-referenced intensity-based fiber optic sensor system using fiber Bragg gratings. / Lo, Yu-Lung; Yan, Ting Yang; Kuo, Chih Ping.

In: Optical Engineering, Vol. 41, No. 5, 01.05.2002, p. 1087-1092.

Research output: Contribution to journalArticle

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