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:
Aug. 20, 1996
Filed:
Apr. 24, 1995
Applicant:
Inventors:
Naoki Kitamura, Tokyo, JP;
Hiroshi Nishimoto, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 49 ; 385 83 ;
Abstract
In an optical coupling device for optically coupling an optical fiber to an optical waveguide formed on a crystalline substrate, the optical fiber is placed in a V-shaped groove formed on the substrate by anisotropic etching. The V-shaped groove is not linearly continuous, but intermittent to intermittently support the optical fiber. The intermittence of the V-shaped groove decreases undesired width expansion of the V-shaped groove. For this structure, a light axis alignment between the optical fiber and the optical waveguide is enhanced.