Patent
Fiber optic gyroscope operating with unpolarized light source
TLDR
In this paper, a fiber optic gyroscope comprising a Sagnac interferometer including a (3×3) optical directional coupler is driven with an essentially unpolarized broadband spatially coherent light beam supplied by a super-luminescent diode source.Abstract:
A fiber optic gyroscope comprising a Sagnac interferometer including a (3×3) optical directional coupler. The gyroscope is driven with an essentially unpolarized broadband spatially coherent light beam supplied by a super-luminescent diode source. A significant reduction in baseband noise occurs due to the use of the essentially unpolarized light beam.read more
Citations
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Apparatus and method for optical signal source stabilization
TL;DR: In this paper, the frequency of an optical signal output from an optical source is controlled by dividing the output from the source into two signal portions each of which is guided along its own optical path.
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Fiber-optic gyroscopes with depolarized light
W.K. Burns,A.D. Kersey +1 more
TL;DR: In this article, a Lyot depolarizer was added to the gyro coil to remove all birefringence-induced effects and to provide a constant scale factor for pi-bias phase shifts in fiber gyros.
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Fiber-optic gyroscope integrated on a silicon substrate
TL;DR: A fiber-optic gyroscope for measuring rotation rates which includes electrical, optical, and electro-optical functional units as well as at least one fiber coil is constructed in this paper.
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Interface configuration for rate sensor apparatus
TL;DR: In this paper, an optical rate sensor apparatus (300) comprises a passive ring Sagnac interferometric arrangement having a light source circuit (308) and a series of multi-turn fiber optic rings (302, 304, 306).
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Fiber optic gyroscope with improved bias stability and repeatability and method
TL;DR: In this article, a planar surface is formed on the planar cladding surfaces of the optical fibers to remove undesired linear polarization components from optical signals guided by the fibers while permitting a desired linear polarization component to propagate unattenuated.
References
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Journal ArticleDOI
Fiber-optic rotation sensing with low drift.
TL;DR: Fiber-optic rotation sensing with an extrapolated drift of 1 deg/h1/2 is accomplished by operating the Sagnac interferometer from a truly single-mode common input–output port in connection with a phase-modulation scheme and active polarization stabilization.
Journal ArticleDOI
Low-drift fibre gyro using a superluminescent diode
TL;DR: By using a superluminescent diode as the light source and a depolariser inside the fiber coil, a constant scale factor was achieved without using polarisation control elements.
Journal ArticleDOI
Fiber-ring interferometer: polarization analysis.
Reinhard Dr Ulrich,Mark Johnson +1 more
TL;DR: In a rotation-sensing fiber-optical Sagnac interferometer, temperature fluctuations and mechanical vibrations affect the birefringence of the fiber and may cause phase shifts like those resulting from rotation.
Journal ArticleDOI
Fiber‐optic gyroscope with [3×3] directional coupler
TL;DR: In this article, a fiber-optic gyroscope using a [3×3] evanescent field-directional coupler as a beam splitter operates automatically at quadrature without the 1/2 π phase bias required by conventional gyroscopes with [2×2] beam splitters.
Journal ArticleDOI
Birefringence and polarization effects in fiber gyroscopes
Pavlath George A,Herbert J. Shaw +1 more
TL;DR: A formalism is presented for treating birefringence and polarization in fiber optic sensors which are operated with various states of polarization of the input light including nonpolarized and partially polarized light, which have potentially useful characteristics.