Optical waveguides – Optical fiber waveguide with cladding – With graded index core or cladding
Reexamination Certificate
2008-07-15
2008-07-15
Font, Frank G (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
With graded index core or cladding
C385S123000, C385S126000, C385S127000, C385S128000, C385S141000, C385S142000, C359S341100, C359S341300, C359S341500, C359S342000, C359S343000, C359S344000
Reexamination Certificate
active
07400807
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.
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Eisenberg Eric C.
Henrie Jason D.
Jenson Barton J.
Minelly John D.
Savage-Leuchs Matthias P.
Aculight Corporation
Font Frank G
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
Lepisto Ryan
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