Optical transmission device for controlling optical level of transmission signal in optical transmission system
US7580631B2 · kind B2 · utility
3Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2006 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Jun 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/296
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmission device includes: an attenuator that attenuates an optical signal from an adjacent optical transmission device; an optical element that is arranged downstream of the attenuator; a detector that detects a change in a characteristic of a transmission path; and a controller that adjusts, when the change is detected, an attenuation of the attenuator to keep the level of the optical signal input to the optical element at a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.