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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14529
Title: Temperature-compensated fiber-Bragg-grating-based magnetostrictive sensor for dc and ac currents
Authors: Chiang K.S.
Kancheti R.
Rastogi, Vipul K.
Published in: Optical Engineering
Abstract: A compact and inexpensive optical fiber sensor for the measurement of dc and ac currents is demonstrated. The sensor consists of a fiber Bragg grating bonded on two joined pieces of metal alloys, one being Terfenol-D and the other MONEL 400. Because Terfenol-D has much stronger magnetostriction, a magnetic field applied along the two alloy bars stretches the two portions of the grating in different proportions and, thus, results in a split in the reflection spectrum of the grating, which can be measured with a simple technique using a single photodetector. On the other hand, because Terfenol-D and MONEL 400 have almost identical thermal expansion coefficients, a change in temperature does not cause the reflected spectrum of the grating to split and, therefore, does not affect the magnetic field measurement. © 2003 society of Photo-Optical Instrumentation Engineers.
Citation: Optical Engineering (2003), 42(7): 1906-1909
URI: https://doi.org/10.1117/1.1576533
http://repository.iitr.ac.in/handle/123456789/14529
Issue Date: 2003
Keywords: Current sensors
Fiber Bragg gratings
Magnetostrictive sensors
Optical fiber sensors
Temperature compensation
ISSN: 913286
Author Scopus IDs: 16309003700
6506633756
7006364661
Author Affiliations: Chiang, K.S., City University of Hong Kong, Optoelectronics Research Center, Department of Electronic Engineering, Tat Chee Avenue, Kowloon, Hong Kong
Kancheti, R., City University of Hong Kong, Optoelectronics Research Center, Department of Electronic Engineering, Tat Chee Avenue, Kowloon, Hong Kong, Electrical Engineering Department, University of Nevada, Reno, NV, United States
Rastogi, V., City University of Hong Kong, Optoelectronics Research Center, Department of Electronic Engineering, Tat Chee Avenue, Kowloon, Hong Kong
Funding Details: This research work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China, under Project No. CityU 1182/00E.
Corresponding Author: Chiang, K.S.; City University of Hong Kong, Optoelectronics Research Center, Department of Electronic Engineering, Tat Chee Avenue, Kowloon, Hong Kong; email: eeksc@cityu.edu.hk
Appears in Collections:Journal Publications [PH]

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