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:
Apr. 01, 2003
Filed:
Oct. 17, 2000
Hiromi Takahashi, Tokyo, JP;
Hideki Ono, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A wavelength demultiplexer is provided whose overall length in a first propagation direction is short, whose production efficiency is high, and whose emission loss is smaller than that of conventional configurations. At the first end face V , the first boundary line F is closer to the second edge H than the first edge H by the distance “b” (b>0). At the first end face V , the second boundary line F is closer to the first edge H than the second edge H by the distance “b”. At the third end face V , the fourth boundary line F is closer to the fourth edge H than the third edge H by the distance “a” (a>0). At the fourth end face V , the sixth boundary line F is closer to the third edge H than the fourth edge H by the distance “a”.