Optical device, system and method for detecting a condition in an optical device
US6714715B2 · kind B2 · utility
5Cited by
14References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 17, 2001 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Dec 20, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/071
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical device and system and method for monitoring a fault condition in an optical device. A loop-back path couples a portion of an optical signal from a first transmission path to a second transmission path as a loop-back signal. The loop-back path includes at least one optical attenuator configured to attenuate the loop-back signal in response to at least one detected condition. The loop-back signal may be detected by line monitoring equipment, where the attenuation imparted by the attenuator is interpreted as corresponding to the detected condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.