Single mode optical fibre having a large cone photonic crystal
US6603912B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02385
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A large core photonic crystal fiber for transmitting radiation having a core comprising a substantially transparent core material and having a core diameter of at least 5&mgr;. The fiber also comprises a cladding region surrounding the length of core material, wherein the cladding region comprises a first substantially transparent cladding material, having a first refractive index, and wherein the first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, wherein the holes are filled with a second cladding material having a second refractive index less than the first refractive index, such that radiation input to the optical fiber is transmitted along the length of the core material in a single mode of propagation. In a preferred embodiment, the core diameter may be at least 20&mgr;, and may be as large as 50&mgr;. The fiber is capable of transmitting higher power radiation than conventional fibers, whilst maintaining propagation in a single mode. The core material may be doped with a material capable of providing amplification under the action of pump radiation input to the fiber. The invention also relates to a fiber a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.