NDLI: Multiplexing of Fiber-Optic Long-Period Grating-Based Interferometric Sensors

Content Provider	IEEE Xplore Digital Library
Author	Murphy, R.P. James, S.W. Tatam, R.P.
Copyright Year	1983
Abstract	Two long-period gratings (LPGs) fabricated in series in an optical fiber form a Mach-Zehnder interferometer, producing a sinusoidal channelled spectrum within the characteristic LPG attenuation bands, which has the appearance of an interference fringe pattern. The phase of the fringes is sensitive to changes in the surrounding environmental parameters, such as refractive index. Fabrication of a number of identical cascaded LPG pairs with different separations produces independent fringe patterns of different frequencies within the attenuation bands. The application of basic Fourier techniques to analyze the transmission spectrum allows the phase of each fringe pattern to be determined independently, facilitating the differentiation of external effects acting on each interferometer
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	825
Ending Page	829
Page Count	5
File Size	253204
File Format	PDF
ISSN	07338724
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical fiber sensors Fiber gratings Optical interferometry Sensor phenomena and characterization Optical fibers Optical attenuators Interference Refractive index Optical device fabrication Frequency sensors Multiplexing optical-fiber long-period gratings (LPGs)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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