Optical fiber line characteristic analysis apparatus and analysis method thereof
US8928868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | May 31, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/319
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test pulse is generated from a first and a second test light beam pulse with different wavelengths, with a predetermined time difference applied between the first and the second test light beam pulse. A circulator inputs the test pulse to a trunk fiber of a measurement target fiber line. A reflected light is extracted which is output from an input end of the trunk fiber. A filter extracts stimulated Brillouin backscattered light. A receiver receives and converts the scattered light into an electrical signal. A processing device carries out the signal to determine in which of N branched fibers the stimulated Brillouin scattered light is generated, while varying a time difference between the first and the second test pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.