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:
Oct. 22, 1996
Filed:
Aug. 02, 1995
Applicant:
Inventor:
Kaoru Okaniwa, Kawagoe, JP;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 43 ; 385 29 ; 385 49 ; 385 50 ;
Abstract
A waveguide device comprising a cladding layer having a refractive index n.sub.cl, a first waveguide having a refractive index n.sub.g (n.sub.g >n.sub.cl) formed on said cladding layer, and a second waveguide having a refractive index n.sub.cp (n.sub.cp >n.sub.g) formed on said first waveguide, wherein the sectional shape of said second waveguide has a tapered structure in which a layer thickness of said second waveguide reduces as the distance from the end face of the waveguide increases, and a tapering angle .THETA. in said tapered structure satisfies the following conditions: