Planar waveguide circuit and optical receiver
US8861902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Oct 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12159
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A planar waveguide circuit comprises a first optical splitter to receive an input optical signal, a second optical splitter to receive a reference optical signal, a first optical signal combiner, and a second optical signal combiner. First and second optical waveguides are provided to couple first and second outputs of the first optical splitter to respective inputs of the first and second optical signal combiners. Third and fourth optical waveguides are provided to couple first and second outputs of the second optical splitter to respective inputs of the first and second optical signal combiners. A phase-shifter is provided located to affect the phase of an optical signal propagating in one of the third and fourth optical waveguides. The first and second optical splitters and the first and second optical signal combiners are arranged such that the first, second, third and fourth optical waveguides do not intersect one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.