Hybrid optical filtering circuit
US5754718A · kind A · utility
18Cited by
12References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Aug 26, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/29398
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hybrid filter includes a dichroic interference WDM filter closely coupled with a Bragg grating. Preferably the Bragg grating is housed within a sleeve having an end face that is directly coupled with an end face lens of the WDM interference filter. The entire filter can be placed within a single housing and temperature controlled. Etalon effects are lessened by placing the Bragg grating as close as possible to the WDM filter. Multiple hybrid filters of this type optically coupled to an optical circulator provided multi-channel demultiplexing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.