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:
Sep. 17, 1991
Filed:
Jun. 26, 1990
Hideaki Okayama, Tokyo, JP;
Issei Asabayashi, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A waveguide type photoswitch has a substrate on which a plurality of waveguide paths are provided in close proximity to each other. Electrodes are arranged along the waveguide paths in a coupling region of the paths. The distance between the waveguide paths is greater at the center of the coupling region than at opposite ends of the region, so that the coupling coefficient can be reduced at the central part of the coupling region and the coupling region itself can be shortened. The electrodes each is shorter than the coupling region to allow the operating voltage to be noticeably lowered and the operation speed to be increased.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile