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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.:

US 7116868 B1

PDFFull Text
Expired
Date of Patent:
Oct. 03, 2006

Filed:

Sep. 08, 2005

Optical branch device and optical coupler module

Applicants:

Nobuhiko Hayashi, Osaka, JP;

Mitsuaki Matsumoto, Hirakata, JP;

Keiichi Kuramoto, Kadoma, JP;

Hitoshi Hirano, Nishinomiya, JP;

Inventors:

Nobuhiko Hayashi, Osaka, JP;

Mitsuaki Matsumoto, Hirakata, JP;

Keiichi Kuramoto, Kadoma, JP;

Hitoshi Hirano, Nishinomiya, JP;

Assignee:

Sanyo Electric Co., Ltd., Osaka, JP;

Attorney:

McDermott Will & Emery LLP

Primary Examiner:

Michelle Connelly-Cushwa

Assistant Examiner:

Chris Chu

Int. Cl.
CPC ...
G02B 6/26 (2006.01); G02B 6/42 (2006.01);
U.S. Cl.
CPC ...
Abstract

An optical branch device, comprising: a branch portion having a first branch waveguide extended linearly and continuously from a waveguide in a basis portion, and second and third branch waveguides extended in the directions farther from the first branch waveguide in such a manner that the first branch waveguide is interposed between the second and third branch waveguides; a parallel portion in which the second and third branch waveguides are positioned in parallel to the first branch waveguide; and a divergent portion in which the second and third branch waveguides are extended gradually farther from the first branch waveguide; wherein the interval pitch P (μm), in the transverse direction, between the first, second and third branch waveguides in the parallel portion and the refractive index difference (Δn) between the core and the clad are set in such a manner that C satisfies a relationship of C=0.5±0.2 wherein C is calculated by substituting P and Δn for an equation of C=Δn×P.

Find Patent Forward Citations

Hayashi, Nobuhiko. (2006). Optical branch device and optical coupler module (U.S. Patent No. 7116868). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7116868

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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