The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2008
Filed:
Nov. 03, 2006
John D. Minelly, Bothell, WA (US);
Matthias P. Savage-leuchs, Woodinville, DE (US);
Barton J. Jenson, Bothell, WA (US);
Jason D. Henrie, Snowhomish, WA (US);
Eric C. Eisenberg, Shoreline, WA (US);
John D. Minelly, Bothell, WA (US);
Matthias P. Savage-Leuchs, Woodinville, DE (US);
Barton J. Jenson, Bothell, WA (US);
Jason D. Henrie, Snowhomish, WA (US);
Eric C. Eisenberg, Shoreline, WA (US);
Aculight Corporation, Bothell, WA (US);
Abstract
A method and apparatus is described that use an index-of-refraction profile having a significant central dip in refractive index (or another tailored index profile) within the core of a gain fiber or a gain waveguide on a substrate. The benefits of this central dip (more power with a given mode structure) are apparent when an input beam is akin to that of a Gaussian mode. In some embodiments, the invention provides a fiber or a substrate waveguide having an index profile with a central dip, but wherein the device has no doping. Some embodiments use a central dip surrounded by a higher-index ring in the index of refraction of the core of the fiber, while other embodiments use a trench between an intermediate-index central core portion and the ring, or use a plurality of rings and/or trenches. Some embodiments use an absorber in at least one core ring.