Dual-side waveguide-based wavelength demultiplexer
US6704480B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2003 |
| Grant date | Mar 9, 2004 |
| Priority date | — |
| Expiry date | Jan 21, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12123
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A demultiplexer is disclosed. The demultiplexer incorporates a reflective grating that is associated with a first waveguide through which a multiplexed optical signal may be transmitted. Individual wavelengths of light that have been reflected by the reflective grating are able to pass through a barrier layer which separates the first waveguide from a second waveguide. A plurality of photodetectors are associated with the second waveguide to read out the individual, wavelength-specific optical signals. The reflective grating is preferably formed on a surface of the first waveguide which projects away from the second waveguide, while the photodetectors are preferably formed at least in part by processing a surface of the second waveguide that projects away from the first waveguide. Both polarities of light are preferably accounted for/collected by the grating as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.