Reversible device for the demultiplexing of several light signals in integrated optics
US4740951A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Mar 13, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2938
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A reversible device for demultiplexing several light signals in integrated optics is more particularly intended to separate n light signals of different wavelengths forming a light beam and transmitted by a first optical fiber and for respectively reinjecting into n second optical fibers the n light signals. Produced in a light guide, it comprises achromatic input optics for rendering parallel said light beam, n gratings arranged in cascade form and operating under Bragg conditions, each grating serving to diffract that part of the light beam carrying one of the n light signals and transmitting the not yet diffracted part of said light beam in the direction of the following grating, as well as n output optics associated with n gratings, each output optics being used for focussing that part of the light beam diffracted by the associated grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.