NDLI: Reduced minimum configuration fiber optic gyro for land navigation applications

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Reduced minimum configuration fiber optic gyro for land navigation applications

Content Provider	IEEE Xplore Digital Library
Author	Emge, S. Bennett, S. Dyott, R. Brunner, J. Allen, D.
Copyright Year	1986
Abstract	Further cost reduction of the fiber optic gyroscope is necessary to meet the economic requirements of land navigation systems. Previous concentration was on the reduction of the number of splices and component improvements in the open-loop minimum configuration. Now non-essential components and splices are eliminated. The source-detector coupler is not part of the Sagnac interferometer, and serves solely to direct light from the interferometer into the output photodetector. Many commercial laser diodes incorporate a back-facet photodetector to monitor laser intensity. The signal returned from the Sagnac traverses the laser, and can be detected at this photodetector. The gyro signal can be distinguished from the laser signal by the bias modulation applied in the interferometer. Configuring a gyro in this manner eliminates a directional coupler and the separate photodetector, as well as up to two fiber splices in an all-fiber gyroscope. A production, open-loop fiber optic gyroscope has been modified to demonstrate this principle. The gyroscope exhibits performance comparable to the conventional minimum configuration.
Starting Page	18
Ending Page	21
Page Count	4
File Size	571311
File Format	PDF
ISSN	08858985
Volume Number	12
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-04-01
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 fibers Navigation Gyroscopes Sagnac interferometers Photodetectors Optical interferometry Fiber lasers Costs Optical coupling Diode lasers
Content Type	Text
Resource Type	Article
Subject	Aerospace Engineering Electrical and Electronic Engineering Space and Planetary Science

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