Two-mode photonic crystal fiber and applications thereof
US7190869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0239
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A two-mode photonic crystal fiber includes a core of a substantially transparent core material. The core material has a core refractive index and a length, and has a core diameter. The fiber also includes a cladding region surrounding the length of core material. The cladding region has a first substantially transparent cladding material, having a first refractive index. The first substantially transparent cladding material has embedded along its length a substantially periodic array of holes, having a diameter, d, and being spaced apart by a pitch, Λ. The holes have a second refractive index, which is less than the first refractive index. The dimensions of the hole diameter, d, and the pitch, Λ, co-operate to give two modes propagation within the photonic crystal fiber independent of input radiation wavelength for any value of the pitch, Λ, for a substantially fixed d/Λ ratio within a range of approximately 0.45–0.65.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.