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. 11, 1996
Filed:
Sep. 30, 1994
Hirotoshi Nagata, Funabashi, JP;
Junichiro Minowa, Funabashi, JP;
Manabu Yamada, Funabashi, JP;
Junichiro Ichikawa, Funabashi, JP;
Jamshid Nayyer, Funabashi, JP;
Shinichi Shimotsu, Funabashi, JP;
Junichi Ogiwara, Funabashi, JP;
Masanobu Kobayashi, Funabashi, JP;
Hideki Honda, Funabashi, JP;
Kazumasa Kiuchi, Funabashi, JP;
Takashi Shinriki, Funabashi, JP;
Toshihiro Sakamoto, Funabashi, JP;
Sumitomo Cement Company, Ltd., Tokyo, JP;
Abstract
An optical waveguide device usable as an optical wave-modulator and having a reduced DC drift includes a LiNbO.sub.3 substrate, an optical waveguide formed in a front surface portion of the substrate, a dielectric layer covering the front surface of the substrate and the optical waveguide surface, and an electrode system arranged on the dielectric layer, the dielectric layer comprising a matrix component consisting of an amorphous SiO.sub.2 and a doping element component consisting of Li and/or Nb; and having a refractive index lower than that of the amorphous SiO.sub.2 matrix free from the doping element component.