Coil mounting arrangement for fiber optic gyroscope

Details Coil mounting arrangement for fiber optic gyroscope Coil mounting arrangement for fiber optic gyroscope

1993-12-27

1995-08-22

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01C 1964

Patent

active

054445345

ABSTRACT:
The sensing coil of a fiber optic gyroscope is mounted by submerging the coil in a gel which surrounds and supports the coil. The components attached to the coil, such as the directional coupler(s) and polarizer, may also be submerged in the gel. The gel is contained by a rigid housing, in which the walls of the housing are spaced away from the coil. The intervening space between the coil and the innermost walls of the housing are filled with the gel, and the gel may be bonded to those innermost walls. The gel remains stiff enough to maintain the coil in a fixed position relative to the housing, and soft enough to avoid any significant effect on the h of the coil over the operating temperature range. In a modified form, the optical-fiber sensing coil is wound around a bobbin that has a layer of gel on the coil-supporting surface. A coating of adhesive is applied to the outside surfaces of the coil to hold the coil windings together in a stable configuration around the layer of gel.

REFERENCES:
patent: 4699451 (1987-10-01), Mohr
patent: 4702599 (1987-10-01), Mohr
Kaminow "Polarization in Optical Fibers", IEEE Journal of Quantum Electronics, vol. QE-17, No. 1, Jan. 1981.
Dow Corning.RTM. Q3-6575 Silicone Dielectric Gel "New Product Information" flyer (1984).
Craig et al. "Interlaboratory Comparison of Polarization-Holding Parameter Measurements on High Birefringence Optical Fiber", Nat. Inst. of Standards and Technology (undated).

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