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. 11, 2006
Filed:
Oct. 19, 2004
Applicant:
Morio Takahashi, Tokyo, JP;
Inventor:
Morio Takahashi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
A core for propagating optical signals, and a pair of first and second cladding layers disposed opposite each other, between which the core is disposed, are provided, which prevents light scattering between the cladding and the core, and reduces polarization dependency. The first cladding layer on which the core is formed has a multilayer film on the boundary face side contacting the core, and the multilayer film has a multilayer structure in which a distortion stress exists among multiple materials.