Path to provide OTDR measurements of an optical transmission system that includes optical isolators
US6028684A · kind A · utility
17Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1996 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Oct 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3154
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A path couples a pair of optical fibers in an optical transmission system. The transmission system includes a plurality of optical amplifiers placed along the transmission line. Associated with these optical amplifiers are optical isolators that limit the flow of optical energy to a single direction. The path allows reflected or scattered light from one optical fiber after the optical isolator to be returned via the other optical fiber. This enables an OTDR device to obtain measurement information along the entire length of the fibers between optical isolators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.