Polarization insensitive wavelength multiplexing 2.times.2 fibre couplers
US5408555A · kind A · utility
19Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Apr 5, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2835
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In the manufacture of a wavelength multiplexing 2.times.2 tapered fused fiber coupler by progressive stretching, the birefringence of the coupler resulting from the progressive stretching is subsequently nulled-out by elastic twisting of the coupler. The progressive stretching is performed, under temperature conditions providing a profile in the coupling region of the coupler having the property that the coupling strength for one of the principal polarization planes of the coupler remains substantially constant during said elastic twisting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.