Method of manufacturing an optical fused-fiber coupler and the coupler manufactured thereby
US5064267A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Sep 10, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2843
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
During the process of manufacturing polarization-selective fused-fiber couplers (1) having two or more input fibers and two or more output fibers and formed in the coupling region (fused region 6) from parallel, nonbirefringent, matched-cladding single-mode fibers, prior to the fusion of the fibers, linearly polarized light with a selected wavelength is fed into one of the input fibers (2) and detected at the ends of the two output fibers (3). The fibers are thereupon fused together with the coupler (1) being drawn until the coupling between the two fibers ceases to fluctuate. The source of heat is then turned off. With the method it is possible to manufacture fused-fiber couplers (1) whose lengths are only approximately 10 mm to 15 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.