Barbell optical fiber and method of making the same
US9322988B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | May 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/1698
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
High aspect ratio core optical fiber designs, which could be semi-guiding, including a core region having a first refractive index and a high aspect ratio elongated cross-section along a slow axis direction, are described. An internal cladding having a second refractive index sandwiches the core and acts as a fast-axis signal cladding. The core has an edge region at both of its short edges that is in contract with edge-cladding regions having a barbell shape. The refractive index of the core regions, the refractive index of the internal claddings, and the refractive index of the edge-cladding regions, are selected so as to maximize the optical power of a lowest-order mode propagating in the fiber core, and to minimize the optical power of the next-order modes in the fiber core. A process to fabricate such a high aspect ratio core fiber is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.