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:
Mar. 08, 2016
Filed:
Feb. 24, 2012
Yutaka Onishi, Yokohama, JP;
Yutaka Onishi, Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
A spot-size converter includes a cladding layer having a principal surface; a first core layer disposed on the principal surface and having a light input/output portion and a first transition portion having a width W, the light input/output portion being coupled to the first transition portion and having a width that monotonously decreases in a first direction from the light input/output portion toward the first transition portion; and a second core layer disposed on the principal surface, the second core layer having a second transition portion and a propagation portion coupled to the second transition portion, the second transition portion having a width W. The first core layer has a refractive index between refractive indices of the second core layer and the cladding layer. The first transition portion and the second transition portion are disposed with a gap therebetween and optically coupled to each other. A ratio (W/W) of the width Wto the width Wmonotonously decreases in the first direction.