Method of testing a passive optical element
US8395763B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2010 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3109
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A passive optical element defining an optical propagation path is tested by coupling a buffer fiber between an input of the propagation path and an optical time domain reflectometer. The OTDR launches optical radiation into the buffer fiber via one end thereof, measures power level of return light received at the OTDR via the buffer fiber, and creates an OTDR signature representing power level of return light as a function of distance from the end of the buffer fiber. The OTDR selects a first marker point by applying data reduction to a portion of a segment of the OTDR signature corresponding to the buffer fiber, selects a second marker point downstream of the input of the optical propagation path, and calculates a first power difference value as difference between a power level at the first marker point and a power level at the second marker point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.