Optical time domain reflectometer
US4289398A · kind A · utility
Inventor
Key dates
| Filing date | Dec 4, 1978 |
| Grant date | Sep 15, 1981 |
| Priority date | — |
| Expiry date | Dec 4, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/071
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical time domain relectometer comprising an optical coupler which includes first and second optical fibers, each having a central core surrounded by cladding material. One end of the first optical fiber is positioned adjacent a pulsed light source and one end of the second optical fiber is positioned adjacent an optical detector. The cladding material at the other ends of the first and second optical fibers is fused together to form a composite portion wherein the central cores of the first and second fibers are closely spaced and surrounded by a continuum of cladding material. The end of the composite portion of the coupler is positioned adjacent the optical fiber waveguide under test.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.