Optical wavelength demultiplexer
US4622663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Jan 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29334
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical wavelength demultiplexer includes a retainer means which curvedly retains an optical fiber. A mirror-polished surface is formed on the convex side of a curved portion of the optical fiber which is retained by the retainer means in such a manner that the mirror-polished surface is in close proximity to the core of the optical fiber. Further, a diffraction grating is disposed such as to oppose and contact the mirror-polished surface. The pitch of the diffraction grating is set to be .lambda./2n.sub.f, where .lambda. represents the wavelength of light to be separated, and n.sub.f the effective refractive index of the optical fiber. The direction of the pitch is selected to be coincident with the extending direction of the optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.