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:
Feb. 18, 2003
Filed:
Feb. 28, 2001
Kenichi Kikuchi, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides a multiple wavelength semiconductor laser device array having approximately the same optical output levels of inducing kink and COD. The multiple wavelength semiconductor laser device array has the same construction as that of a conventional two-wavelength semiconductor laser device array except the thickness of the reflection films at the light emitting end faces. The thickness of the reflection films deposited on the light emitting end faces of the two-wavelength semiconductor laser device array is determined so as to have a lower reflectivity at a light emitting end face of a 650 nm band semiconductor laser device consisting of an AlGaInP type four-element compound semiconductor which may induce kink and COD more easily, than a reflectivity at a light emitting end face of a 780 nm band semiconductor laser device consisting of an AlGaAs type three-element compound semiconductor.