Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Reexamination Certificate
2008-04-22
2008-04-22
Font, Frank G. (Department: 2883)
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
C385S037000, C385S123000, C385S124000, C385S127000, C385S128000, C385S141000, C385S142000, C385S144000
Reexamination Certificate
active
11349871
ABSTRACT:
This invention relates to an optical fiber for long period grating (LPG), LPG components, and manufacturing method of LPG used as a mode coupler, an optical filter, etc. The optical fiber for LPG comprises a core layer, a first cladding layer that surrounds said core layer and transmits the cladding modes, and a second cladding layer that surrounds said first cladding layer and confines the optical signal of the cladding mode within said first cladding layer. The LPG component comprises an optical fiber for LPG, a coating reinforcement to cover and reinforce said optical fiber for LPG. The manufacturing method of LPG comprises a step of preparation of an optical fiber, a step of constructing the LPG on a predetermined region in said core of said optical fiber by irradiating laser light on said region over a predetermined period corresponding to the LPG, on the predetermined part of said optical fiber, and a step which covers and reinforces said grating region.
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Aiso Keiichi
Kobayashi Hiroshi
Niino Yukio
Nishiyama Kazuhiko
Tsuda Toshiaki
Cantor & Colburn LLP
Dupuis Derek L.
Font Frank G.
The Furukawa Electric Co. Ltd.
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