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:
Apr. 22, 2008
Filed:
Feb. 08, 2006
Toshiaki Tsuda, Tokyo, JP;
Yasuo Uemura, Tokyo, JP;
Keiichi Aiso, Tokyo, JP;
Takeshi Yagi, Tokyo, JP;
Yukio Niino, Tokyo, JP;
Kazuhiko Nishiyama, Tokyo, JP;
Hiroshi Kobayashi, Tokyo, JP;
Toshiaki Tsuda, Tokyo, JP;
Yasuo Uemura, Tokyo, JP;
Keiichi Aiso, Tokyo, JP;
Takeshi Yagi, Tokyo, JP;
Yukio Niino, Tokyo, JP;
Kazuhiko Nishiyama, Tokyo, JP;
Hiroshi Kobayashi, Tokyo, JP;
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.