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:
Jun. 13, 2017
Filed:
Jul. 09, 2014
Photonics Electronics Technology Research Association, Tokyo, JP;
Shigeki Takahashi, Tokyo, JP;
Abstract
A low-cost optical circuit, in which influence of reflected light is reduced, is provided. According to an embodiment of the present invention, an optical circuit () comprises a first optical coupler (A) having at least two outputs, and a second optical coupler (B) coupled to at least one of the outputs of the first optical coupler (A), and wherein the ratio of an intensity of light reflected from the first optical coupler (A) to an intensity of light inputted to the first optical coupler is smaller than the ratio of an intensity of light reflected from the second optical coupler (B) to an intensity of light inputted to the second optical coupler.