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. 21, 1990
Filed:
Jul. 06, 1988
Taiji Morimoto, Nara, JP;
Masahiro Yamaguchi, Tokai, JP;
Shinji Kaneiwa, Nara, JP;
Hiroshi Hayashi, Kyoto, JP;
Hidenori Kawanishi, Higashiosaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A semiconductor laser device comprising an active layer that constitutes a laser-oscillating resonator, and an inner-striped channel in the resonating direction, light from the active layer being absorbed at both edges of the striped channel, resulting in an optical waveguide within the active layer, wherein the amount of light to be absorbed at both edges of the striped channel in the vicinity of at least one of the light-emitting facets is smaller than that to be absorbed at both edges of the striped channel inside of the light-emitting facets.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile