Arrayed waveguide grating type optical multiplexer/demultiplexer
US6668116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2001 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Jun 26, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/1203
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An arrayed waveguide grating type optical multiplexer/demultiplexer of the invention eliminates the temperature dependency of the light transmission center wavelengths and suppresses an increase in insertion loss with a simple configuration even under the conditions of high temperature and high humidity. A waveguide forming area comprising an optical input waveguide, a first slab waveguide, an arrayed waveguide formed of a plurality of channel waveguides arranged side by side having a different length each other, and a plurality of optical output waveguides connected one by one is formed on a substrate. For example, the first slab waveguide is separated at crossed separation planes that cross the path of light passing through the first slab waveguide. On the crossed separation planes, a matching grease is applied. A thin film member for covering the area arranged with the matching grease is disposed to suppress the evaporation of the matching grease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.