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:
Jun. 14, 1988
Filed:
Jun. 10, 1986
Applicant:
Inventors:
Ikuo Mito, Tokyo, JP;
Masayuki Yamaguchi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 96 ; 372 32 ; 372 46 ;
Abstract
Laser chips which are stably operated in a single mode result from a semiconductor laser device in which a diffraction grating is formed neighboring an active layer. The distribution of current to be injected into the active layer is controlled to a configuration which substantially corresponds to that of the distribution of the field intensity of light along the laser optical axis inside the active layer.