Slab-type optical device
US4850666A · kind A · utility
19Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Jan 6, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/125
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A slab-type optical device comprising a pair of single mode waveguides equal in phase constant and intersecting each other each at its one end and a pair of single mode waveguides different in phase constant and intersecting each other each at its one end. The pairs of waveguides are joined to each other at their intersections. The angle of intersection of the two waveguides in each pair is set to such a small value that when light propagates along the waveguide a very small distance, the variation in the spacing between the waveguides is negligible relative to the distance of propagation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.