Optical multi/demultiplexer using interference filters
US4474424A · kind A · utility
50Cited by
5References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1981 |
| Grant date | Oct 2, 1984 |
| Priority date | — |
| Expiry date | Mar 20, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2938
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The disclosed multiplexer/demultiplexer (10, 40) features input and output optical fibers (20, 22, 24, 42, 44, 46, 48, 50) coupled to one face (16) of a graded refractive index rod collimating lens (12). Associated with the other face (18) of the lens (12) are a plurality of multi-layer dielectric interference filters (26, 32, 52, 54, 56, 58) which selectively reflect the input signals at different angles according to the wavelength and thereby direct them back through the lens (12) to the appropriate output fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.