Optical fiber test method and apparatus
US4659215A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1984 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Nov 19, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/088
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A test optical fiber is slightly bent to a restorable extent, and light is side-illuminated on the bent portion to couple an optical signal to the test fiber. The optical signal coupled to the fiber by this method, propagates through the optical fiber in both directions. If the bending point, which is the point of coupling, is provided near one end of the optical fiber, because the power of the optical signal output from the end is substantially one half of the power of an optical signal coupled at the bending point, the transmission loss of the optical fiber can be measured by comparing the optical power with the optical power of the signal reaching the other end of the fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.