Wavelength-selective multiplexer-demultiplexer
US4622662A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1984 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Apr 2, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29311
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A multiplexer-demultiplexer for different wavelengths carried by optical fibers (10) the ends of which are disposed in the immediate vicinity of the focus of a concave mirror (18) associated with a plane diffraction grating (15) is disclosed. The multiplexer-demultiplexer consists of four elements that are adhesively attached to one another, namely, a fiber-carrying element (1); a grating-carrying element (15); an intermediary element (3) of the same index as the element (2); and a mirror element (4) having an index of refraction different from that of element (3) and selected to compensate for longitudinal spherical aberration of the mirror (18) for at least one of the wavelengths being utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.