Optical fiber fundamental mode field expander
US7606452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 2008 |
| Grant date | Oct 20, 2009 |
| Priority date | — |
| Expiry date | Aug 13, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2552
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for providing an expanded mode field from a single mode optical waveguide is formed by fusing a length of single mode optical fiber with a length of fiber rod absent a cladding and adiabatically tapering the fused region. The length of single mode fiber has a core having a refractive index nco and a cladding having a refractive index ncl, wherein ncl<nco and wherein the cladding has an outer diameter ρ. The length of fiber rod absent the cladding has a refractive index of the fiber rod is substantially the same as the cladding index ncl of the single mode optical fiber. The outer diameter of the length of fiber rod is ρ, the same as the cladding diameter of the single mode fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.