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:
Nov. 09, 1993
Filed:
Apr. 23, 1992
Markus-Christian Amann, Munich, DE;
Stefan Illek, Feldkirchen-Westerham, DE;
Wolfgang Thulke, Munich, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A tunable laser diode on a semi-insulating substrate having a stripe-shaped layer structure has an intermediate layer between an active layer and a tuning layer that is grown-over by an confinement layer that is doped for the same conductivity type as the intermediate layer. An oppositely doped, lateral region is electrically connected via an identically doped lower region to the active layer. An upper region is likewise oppositely doped and is electrically connected to the tuning layer. A contact layer is essentially planarly applied on the surface of the confinement layer and has respective portions on the appertaining regions on which the contacts provided with adequate bond areas are applied with a further contact layer for the common contact.