Integrated optical circuit for fiber-optics gyroscopes

Details Integrated optical circuit for fiber-optics gyroscopes Integrated optical circuit for fiber-optics gyroscopes

1992-11-10

1994-03-08

Lee, John D.

Optical waveguides

With optical coupler

Particular coupling structure

385 11, 385 14, 385 42, G02B 612

Patent

active

052934390

ABSTRACT:
An integrated optical circuit for fiber-optics gyroscopes comprising two pairs of waveguide conduits each having a pair of input/output ports on each of end surfaces of a substrate opposed to each other and a pair of directional couplers each disposed between the two waveguide conduits forming each of the pairs of waveguide conduits. The pair of the directional couplers are connected to each other through a waveguide conduit in which a polarizer is disposed in its course, the other waveguide conduits connected to the directional couplers have metal coatings in their courses and non-reflective coatings on an end surface of the substrate. This integrated optical circuit is capable of preventing electromagnetic beams from being radiated into the substrate and suppressing re-entry of radiated electromagnetic beams into the waveguide conduits.

REFERENCES:
patent: 4938594 (1990-07-01), Pavlath
patent: 4984861 (1991-01-01), Suchoski, Jr.
patent: 5111517 (1992-05-01), Riviere
patent: 5140655 (1992-08-01), Bergmann
patent: 5185831 (1993-02-01), Kawashima
patent: 5202941 (1993-04-01), Granestrand
Mikami et al. "Coupling-Length Adjustment for an Optical Directional Coupler as a 2.times.2 Switch", Apply Physics Letters 1435(i) pp. 38 and 39, 40 Jul. 1. 1979.
"Fiber-Optic Rotation Sensors", S. Ezekiel, H. J. Arditty, 1982 Springer-Verlag Berlin Heidelberg, pp. 3-27 (no month).
"Test Results Of An Integrated Fiber-Optics Gyroscope Brass Board", H. J. Arditty, et al, pp. 147-150. (Apr. 1983).

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