Ultra high numerical aperture high power optical fiber laser
US6115526A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Mar 13, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S3/06729
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber structure includes: an optical fiber comprising a rare earth doped core (that may be single mode or multi-mode), or several single mode cores, surrounded by a silica material; a glass cylinder tube containing the optical fiber along a length thereof such that the doped core is located at a center of the glass cylinder for a single core, or arranged geometrically around the center for multiple cores; and a support structure disposed between the light guiding section of the optical fiber optical fiber and an inner wall of the tube that functions as a portion of the support structure of the light guiding portion of the optical fiber. The support structure is arranged such that the effective cladding of the core is a gas contained between the optical fiber and the inner wall of the tube for providing the optical fiber with a numerical aperture that is approximately one. A polarization maintaining embodiment is described, as are methods for fabricating the optical fiber structures. To reduce the overall length of the fiber, a chirped Bragg grating may be written into a multi-mode section of the fiber. The optical fiber structures can be used as gain elements in optical …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.