Integrated optical circuit for fiber-optics gyroscopes
US5293439A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Nov 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/2865
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.