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:
Jan. 16, 1990
Filed:
Sep. 27, 1988
Applicant:
Inventors:
Kazuhisa Uomi, Hachioji, JP;
Shinji Tsuji, Saitama, JP;
Makoto Okai, Koganei, JP;
Shinji Sakano, Hachioji, JP;
Naoki Chinone, Chofu, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 45 ; 372 46 ; 372 50 ; 372 96 ;
Abstract
A surface emitting laser diode having a two-dimensionally extended light emitting region is disclosed in which the light emitting region includes a plurality of stripe regions and gap regions each formed between adjacent stripe regions, the stripe regions are optically coupled with each other through the gap regions, and an even-order diffraction grating is formed in at least a part of the light emitting area. The laser diode having the above structure can emit a high-intensity, well-collimated laser beam.