Mode scrambler as an optical isolator for higher-coherence lasers in multi-mode fiber plants
US5138675A · kind A · utility
28Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Jun 12, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4207
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fiber-optic communication system (10) employs a Fabry-Perot laser (14) that launches its output onto a single-mode pigtail (16) physically coupled to a mode scrambler (22), which is air coupled to a transmission medium consisting of multi-mode fiber-optic cable. Because the mode scrambler (22) divides the laser output power among many modes, the fraction of any reflected light that is coupled back into the cavity of the laser (14) can be made small enough to permit sufficient laser coherence for high-data-rate-transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.