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:
Oct. 09, 1984
Filed:
Feb. 25, 1982
Lodewijk J Van Ruyven, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A semiconductor laser device has a semiconductor body in which two or more lasers are provided which can generate substantially parallel radiation beams of preferably different frequencies which are situated close together. According to the invention, the semiconductor body has at least one semiconductor laser of the double hetero-junction type (DH-type) comprising a plurality of semiconductor layers with a radiating p-n junction parallel to the semiconductor layers and at least one semiconductor laser of the TJS ('Transverse Junction Stripe') type, the p-n junction surface of which is transverse to that of the DH-laser. The device comprises a layer structure having at least two active layers, each between two passive layers. One laser is formed in a mesa-shaped part of the body which comprises both active layers, the other in an adjacent part in which the uppermost active layer is absent. The TJS-laser is preferably provided in the last-mentioned part. More than two lasers may also be provided.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile