Optical multiplexer-demultiplexer for use with optical fiber wavelengths
US4630255A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Dec 31, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29368
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to an optical wavelength multiplexer-demultiplexer using optical fibers. For a bidirectional three-channel link with two go channels and one return channel the multiplexer-demultiplexer comprises a chamfered link fiber (30) provided with an interference filter (25) and optically coupled with three intermediate fibers (13, 14, 15). A first intermediate fiber (13) is chamfered and fitted with an interference filter (20) and has an optical axis which intersects the optical axis of the link fiber at a given angle (.theta.), while a second intermediate fiber (14) is coupled to the chamfered fiber, with the filter (20) providing multiplexing and demultiplexing between the two go channels. A third intermediate fiber (15 is applied to the cylindrical wall of the link fiber to receive or tansmit the return channel via the filter (25). The multiplexer-demultiplexer is applicable to optical fiber telecommunication systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.