Resonant Fiber Optic Gyroscope Using an Air-Core Fiber

Air-core photonic bandgap fibers (PBFs) have great potential for the resonant fiber-optic gyroscope (RFOG), because they reduce both the Kerr-induced drift and the thermal polarization instability. We experimentally studied an open-loop RFOG in which a 20-m resonant loop of 7-cell air-core fiber is...

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Bibliographic Details
Published in:Journal of lightwave technology 2012-04, Vol.30 (7), p.931-937
Main Authors: Terrel, M. A., Digonnet, M. J. F., Shanhui Fan
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Coils
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Frequency modulation
Gyroscopes
Integrated optics. Optical fibers and wave guides
Noise
Optical and optoelectronic circuits
Optical fiber amplifiers
Optical fiber couplers
Optical fiber polarization
photonic-bandgap fibers
Reflection
resonant fiber-optic gyroscope
RFOG
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Summary:Air-core photonic bandgap fibers (PBFs) have great potential for the resonant fiber-optic gyroscope (RFOG), because they reduce both the Kerr-induced drift and the thermal polarization instability. We experimentally studied an open-loop RFOG in which a 20-m resonant loop of 7-cell air-core fiber is closed by connecting the air-core fiber to a conventional single-mode fiber directional coupler. We measured a random walk of 0.055 ° /s 1/2 and a long-term drift with a standard deviation of 0.5 ° /s and a peak-to-peak variation of 2.5 ° /s over 1 hour. We discuss the sources of error in this RFOG and identify areas for future improvement. We project that with straightforward improvements, tactical-grade performance should be possible.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2011.2177959