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:
Aug. 19, 2008
Filed:
Nov. 14, 2002
Hiroaki Okano, Tokyo, JP;
Seiichi Kashimura, Tokyo, JP;
Hiroaki Okano, Tokyo, JP;
Seiichi Kashimura, Tokyo, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
A silica based glass waveguide having almost the same optical characteristics as designed value and an optical module using a silica based glass waveguide having excellent optical characteristics and reduced connecting loss are provided. A silica based glass waveguide is comprising a core waveguide and a clad, a core waveguide is formed rectangular in cross section and of SiO—TiOgroup glass on a synthetic silica glass substrate, and a clad is formed of SiO—BO—POgroup glass or etc. on a synthetic silica glass substrate and a core waveguide. A synthetic silica glass substrate is formed of pure SiOand having birefringence quantity less than 10 nm/cm.