Calibration of optical time domain reflectometry optical loss measurement in optical fibers having potentially dissimilar light backscattering efficiencies
US9360392B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Aug 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3109
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Calibration of optical time domain reflectometry optical loss measurement in optical fibers having potentially dissimilar light backscattering properties is disclosed. For example, an optical time domain reflectometer (OTDR) can be employed to perform a single-ended optical loss measurement on an optical fiber before and after joinder (e.g., a splice) to determine the efficiency of the joinder. The individual optical fibers provided in a joined optical fiber may have dissimilar backscatter light collection efficiencies resulting in an erroneous OTDR optical loss measurement, because an OTDR assumes the backscatter light collection efficiency of the joined optical fiber is identical before and after joinder. An OTDR calibration factor is first determined before an OTDR optical loss measurement of the joined optical fiber is made. The OTDR calibration factor is used to correct any error in an OTDR optical loss measurement of the joined optical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.