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. 04, 1992
Filed:
Dec. 14, 1990
Elyahou Kapon, Old Bridge, NJ (US);
Meir Orenstein, Old Bridge, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
A method of fabricating an array of vertical-cavity, surface-emitting lasers that allows the lasers to be phase-locked and the resulting device. The growth of the laterally unpatterned epitaxial vertical-cavity structure includes an upper mirror which is only partially reflective. A gold layer supplies the final reflectivity. A grip pattern is then etched in the gold layer, and a lower reflectivity metal layer is deposited over the gold layer and into the grid. The lower reflectivity metal both provides a common contact to the laser elements but also degrades the mirror reflectivity in the grid portion. The lower reflectivity prevents the grid portion from lasing. The areas within the grid pattern are separate lasers, but they are so closely separated that they lase coherently among themselves.