COTDR arrangement with swept frequency pulse generator for an optical transmission system
US7869708B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2004 |
| Grant date | Jan 11, 2011 |
| Priority date | — |
| Expiry date | Aug 12, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/0771
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and apparatus is provided for obtaining status information from a given location along an optical transmission path. The method begins by generating a cw probe signal having a prescribed frequency that is swept over a prescribed frequency range. The cw probe signal is transmitted over the optical path and a returned COTDR signal in which status information concerning the optical path is embodied is received over the optical path. A receiving frequency within the prescribed frequency range of the returned COTDR signal is detected to obtain the status information. The detecting step includes the step of sweeping the receiving frequency at a rate equal to that of the prescribed frequency. A period associated with the receiving frequency is temporally offset from a period associated with the prescribed frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.