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:
Feb. 06, 2007
Filed:
Mar. 25, 2005
Satoshi Oikawa, Tokyo, JP;
Junichiro Ichikawa, Tokyo, JP;
Futoshi Yamamoto, Tokyo, JP;
Sunao Kurimura, Ibaraki, JP;
Kenji Kitamura, Ibaraki, JP;
Satoshi Oikawa, Tokyo, JP;
Junichiro Ichikawa, Tokyo, JP;
Futoshi Yamamoto, Tokyo, JP;
Sunao Kurimura, Ibaraki, JP;
Kenji Kitamura, Ibaraki, JP;
Sumitomo Osaka Cement Co., Ltd., Tokyo, JP;
National Institute for Materials Science, Ibaraki, JP;
Abstract
The present invention provides a highly-integrated and compact optical element and further provides an optical element having various functions such as lower driving voltage, chirping suppression and polarization-independency. The optical element comprising a substrateconsisting of a material having an electrooptic effect, top optical waveguides-an-formed on the top face of said substrate, bottom optical waveguides formed on the bottom face of said substrate, a top modulating electrode for controlling the phase of a light wave being propagated through said top optical waveguide, and a bottom modulating electrode for controlling the phase of a light wave being propagated through said bottom optical waveguide, is characterized in that at least one side edge of said substrate comprises output and input of said optical waveguides formed on said top and bottom faces, and a turnback element is located adjacent to said one side edge to guide the light wave from said output to said input.