Chiral in-fiber polarizer apparatus and method
US7095911B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2004 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Jan 20, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/0209
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A chiral in-fiber polarizer implemented in a chiral fiber structure having a core and a cladding surrounding the core, is provided. The chiral polarizer includes an entry end for receiving incident light and an exit end for outputting polarized light, as well as a pitch variation along its length between the entry and exit ends in accordance with a predetermined desirable pitch profile, wherein in one embodiment of the inventive polarizer, the inverse value of the chiral structure's pitch at the exit end is less than at the entry end, and preferably substantially equal to zero. The pitch profile may be advantageously selected to correspond to one or more predetermined pitch configurations, may be determined in accordance with one or more mathematical functions, or may be random. In accordance with the present invention, at least one of various parameters of the chiral structure, including, but not limited to, the core and cladding refractive indices and sizes, and the pitch profile, may be configured and selected to substantially eliminate the undesirable polarization component of the incident light by achieving an optimized extinction ratio within a desired spectral range. In anot…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.