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. 01, 2016
Filed:
May. 10, 2012
Jun Ushida, Tokyo, JP;
Shigeru Nakamura, Tokyo, JP;
Shigeki Takahashi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
An optical waveguide type optical terminator forms an optical waveguide structure including at least an optical absorption core () which is formed on a clad layer () and includes a portion composed of silicon in which an impurity of 10cmor more is doped, and is used by being optically connected in series with an optical waveguide including a core () composed of silicon. The optical absorption core () is sufficient provided that, at least, an impurity of around 10cmis doped therein. For example, its impurity concentration is sufficient provided that it falls within a range of 10-10cm. The existence of this impurity causes absorption of light in the optical absorption core ().