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:
Dec. 27, 1988
Filed:
Jul. 23, 1987
Applicant:
Inventor:
Ikuo Mito, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S / ; H01S / ;
U.S. Cl.
CPC ...
372 96 ; 372 45 ; 372 48 ; 372 49 ; 372102 ;
Abstract
An improved distributed feedback laser diode comprises a diffraction grating in a resonator. The diffraction grating is formed to have a phase shift of .lambda./8 to 3.lambda./16 at a portion thereof so that the phase shift amount of approximately .lambda./4 is obtained in a case where a maximum rate of light output is produced thereby to result in a single axial mode oscillation.