Method of forming an optical fibre coupler and a coupler so formed
US5175779A · kind A · utility
21Cited by
1References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Aug 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2856
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Six secondary optical fibres (20) are located about and parallel to a central optical fibre (21) by a capillary tube (22) to form a fibre bundle which is then formed into a fused, tapered coupler in which the tapering is stopped when the proportions of light coupled out of the central fibre (21) at 1.3 and 1.53 .mu.m are first equal. The fusion process can provide sufficient fusion between the central fibre and each secondary fibre to provide a 1 to (n+1) coupler where n is the number of secondary fibres. This method provides a coupler which is wavelength-flattened between 1.3 and 1.53 .mu.m using similar fibres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.