Optical communication system with monitoring device for avoiding giant pluses
US5475521A · kind A · utility
37Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 6, 1993 |
| Grant date | Dec 12, 1995 |
| Priority date | — |
| Expiry date | May 6, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/10015
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
If, in optical communication systems using fiber-optic amplifiers, the optical isolator at the input is omitted on cost grounds and because of the deterioration of the noise characteristics caused by the insertion loss, a giant pulse may be developed when a fiber-optic connector at the input is being separated. To avoid this occurrence, use is made of a monitoring device (7) which, when the power input to the fiber-optic amplifier (4, 5, 3, 6) drops below a given threshold, quickly turns off the current of the pump laser (4) or interrupts the light path of the pump laser (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.