Method and apparatus for determining attenuation across optical fiber splice
US4634274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jul 16, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/35
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for determining optical power attenuation across a splice between first and second optical fibers utilizes the algorithm: EQU dB=10 log (1-L.sub.tel) (2) where L.sub.tel is determined by compensating for differences in intensity profiles existant in the first optical fiber when injecting light therein for purposes of measuring attenuation versus the intensity profile created when injecting light into the first fiber for transmitting telecommunications data and the light has been propagating in the fiber for a distance and steady state intensity distribution is achieved. Preferably, a numerical aperture of the first optical fiber and a sample optical fiber are empirically determined, and L.sub.tel is calculated by compensating for differences between these numerical apertures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.