Optical head with an integrated isolator for coupling a semiconductor laser to a light guide
US5121451A · kind A · utility
11Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2713
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A DFB laser (2) is coupled to a monomode line fiber (14) via an isolator constituted by a Faraday rotator crystal (4) and a polarizing fiber (10) which is welded to a fiber to be coupled (14). A focusing lens (8) is integrated in an intermediate block including the rotator crystal (4) and a permanent magnet (6). The invention is particularly suitable for making light-emitting heads for use in optical fiber telecommunications systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.