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. 01, 1989
Filed:
Apr. 13, 1988
Applicant:
Inventors:
Sadayoshi Matsui, Tenri, JP;
Shinji Kaneiwa, Nara, JP;
Taiji Morimoto, Nara, JP;
Masahiro Yamaguchi, Tenri, JP;
Mototaka Taneya, Tsukuba, JP;
Mitsuhiro Matsumoto, Nara, JP;
Assignee:
501 Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 372 48 ;
Abstract
An index guided semiconductor laser device comprising a striped optical waveguide in the active layer, at least a part of the wavegide having continuous indentations at the interface between the waveguide and the outside of the waveguide, whereby only laser light of a high-order transverse mode is radiated from the waveguide to the outside of the waveguide and only laser light of the fundamental transverse mode is propagated within the waveguide.