Method for checking the correct installation of a bend-insensitive optical cable and optical cable suitable for the method thereof
US9097868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 7, 2010 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | May 14, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4413
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting faulty laying down of an optical cable exhibiting a measured cut-off wavelength includes providing an optical cable for transmitting optical signals including at least one single-mode optical fiber having an attenuation equal to or larger than a first threshold value as measured when wound for one turn around a bending radius equal to or smaller than 5 mm at at least one predetermined test wavelength, the test wavelength being smaller than the measured cut-off wavelength, and an attenuation smaller than a second threshold value as measured when wound for one turn around a bending radius equal to at least a minimum bending radius at an operative wavelength equal to or larger than the measured cut-off wavelength; laying the optical cable; and measuring the attenuation in the at least one optical fiber at the predetermined test wavelength. An optical cable includes at least one optical fiber that is bend sensitive at a predetermined test wavelength not larger than the measured cut-off wavelength and is bend insensitive at an operative wavelength larger than the measured cut-off wavelength, where the cable operates in single-mode regime.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.