Environmentally independent fiber optic rotation sensor

Details Environmentally independent fiber optic rotation sensor Environmentally independent fiber optic rotation sensor

1979-12-18

1984-07-24

Arnold, Bruce Y.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

044615744

ABSTRACT:
An environmentally independent fiber optic rotation sensor having a polarizer or polarization filter interposed between each beam coupler and the beamsplitter of the rotation sensor. The polarizers permit the passing of the polarization of the beams therethrough while rejecting the cross-polarized waves of the beams thereby causing a co-polarized mode of operation to take place. As a result of the co-polarized mode of operation the rotation sensor is unaffected by the surrounding environmental conditions. However, in so doing, the rotation sensor is subject to spurious fringe patterns which take place at the fiber ends. Elimination of these fringe patterns take place at the input side of the rotation sensor rather than at the output side in order to produce satisfactory rotation sensing.

REFERENCES:
patent: 4259016 (1981-03-01), Schiffner
patent: 4280766 (1981-06-01), Goss et al.
patent: 4302107 (1981-11-01), Schiffner et al.
Gambling, W. A., "Birefringence and Optical Activity in Single-Mode Fibres", Optical Fiber Transmission II; Jun. 1977.
Steinberg, R. A., et al., "Performance Limitations Imposed on Optical Waveguide Switches and Modulators by Polarization" Applied Optics vol. 15, No. 10, 1976.
Vali et al., "Fiber Ring Interferometer" Applied Optics vol. 15, No. 5 May 1976.
Arditty, H., "Re-Entrant Fiberoptic Approach to Rotation Sensing" Spie vol. 157, Laser Inertial Rotation Sensors.
Simon, A., et al., "Evolution of Polarization Along a Single-Mode Fiber", Applied Physics Letters, vol. 31, No. 8, Oct. 15, 1977, pp. 517-520.

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