Fiber optic sensor coil including buffer regions

Details Fiber optic sensor coil including buffer regions Fiber optic sensor coil including buffer regions

1996-12-24

1998-06-16

Allen, Stephone B.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356350, G01J 508, G01C 1964

Patent

active

057675090

ABSTRACT:
A sensor coil for a fiber optic gyroscope. At least one dummy layer forms an integral structure with, and shares the thermal expansion characteristics of, a potted coil comprising a plurality of layers of windings of a first optical fiber. In a gyroscope, the potted coil is arranged to receive the output of a source of optical energy as a pair of beams that counter-propagate therein and to provide the resultant interference pattern, as gyro output, to a detector. The dummy layer displaces layers or windings of the potted coil from regions likely to contribute to Shupe bias effects.

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N. J. Frigo, "Compensation of Linear Sources of Non-reciprocity in Sagnac Interferometers", Fiber Optics and Laser Sensors I, proc. SPIE vol. 412, p. 268 (1983).
D. M. Shupe, "Thermally Induced Nonreciprocity in the Fiber Optic Interferometer," Applied Optics, vol. 19(5), pp. 654-655 (1980).

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