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:
Jan. 15, 2013
Filed:
Sep. 30, 2009
Vcsel with non-circular mesa and current confinement aperture for higher order lateral mode emission
Michael Moser, Baden, CH;
Sven Eitel, Zurich, CH;
Wolfgang Kaiser, Zurich, CH;
Oclaro Technology Limited, Towcester, GB;
Abstract
A vertical cavity surface emitting laser (VCSEL) () has a substrate (), on which are disposed first and second distributed Bragg reflectors (DBRs) (), each DBR comprising a stack of layers of alternating refractive index, an active layer () disposed between the DBRs, and an aperture layer () disposed either between the DBRs or within one of the DBRs. The aperture layer () has a border () having an internal boundary with a plurality of indented portions defining one or more apertures. Such a VCSEL is easily manufacturable and provides a narrow bandwidth output, as well as mitigating at least some of the problems of prior art VCSELs. Mesa () may be etched to be non-circular and subsequent selective oxidation of aperture layer () results in a non-circular current confinement aperture () promoting higher-order lateral modes (LP).