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:
Jul. 31, 2007
Filed:
Aug. 01, 2006
Yasuo Fukai, Habikino, JP;
Toshiyuki Okumura, Tenri, JP;
Yasuo Fukai, Habikino, JP;
Toshiyuki Okumura, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An OBO planar waveguide device includes an Si substrate, an SiOlayer formed on the Si substrate, and a plurality of Si optical waveguides provided on the Si substrate in parallel to each other. A heater and a heat sink are provided on opposing side end portions of the Si substrate respectively. As a result of a function of the heater and the heat sink, gradient of temperature distribution of the Si substrate is formed in a direction in which the plurality of Si optical waveguides are aligned. Thermal resistance of the Si substrate in the direction in which the gradient of temperature distribution is formed is greater than 20 K/W and lower than 2000 K/W. The OBO planar waveguide device attaining reduced power consumption is thus obtained.