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:
Mar. 15, 2005
Filed:
Sep. 12, 1997
Herman C. Lowenhar, New York, NY (US);
Burton L. Hulland, Long Beach, NY (US);
Herman C. Lowenhar, New York, NY (US);
Burton L. Hulland, Long Beach, NY (US);
Kol Ohr Corporation, Wilmington, DE (US);
Abstract
The present invention discusses a modulation method and apparatus for modulating an extended-cavity laser (). The method and apparatus () entails the use of each pulse in an input modulating pulse train as the trigger for the generation of a brief or 'notch' pulse, i.e. a pulse that briefly diminishes the normal drive current. Each 'notch' pulse is used to drive the semiconduct () embedded in an extended cavity with a current that flows opposite to its normal drive current. This serves to diminish the inverted charge-carrier population essential to lasing action, so the laser output falls sharply in a form of amplitude modulation. The invention also discloses a simple, miniaturized means () of micropositioning, based on the differential rotation of nested conical plugs, that can serve to couple the semiconductor laser to the cavity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile