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:
Jul. 21, 1992
Filed:
May. 09, 1991
Winston K Chan, Fair Haven, NJ (US);
Ann C Von Lehmen, Little Silver, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
An optically controlled vertical-cavity, surface-emitting laser comprising a heterojunction, bipolar photo-transistor epitaxially grown on a substrate and a vertical-cavity, surface-emitting laser epitaxially grown on the photo-transistor. Two electrodes set up a single current path through the laser and photo-transistor. A controlling optical beam selectively illuminates the photo-transistor to turn it on, open the current path through the laser, and causing the laser to emit light. Dependent upon the electrical biasing conditions, the combination device can be used as an optical amplifier or can be made to optically latch. Further, it can be biased to operate as an AND or OR gate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile