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. 24, 2007
Filed:
Oct. 31, 2002
Applicants:
Anatoliy A. Kosterev, Houston, TX (US);
Frank K. Tittel, Houston, TX (US);
Inventors:
Anatoliy A. Kosterev, Houston, TX (US);
Frank K. Tittel, Houston, TX (US);
Assignee:
William Marsh Rice University, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/00 (2006.01); H01S 3/13 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides methods and apparatus for flexible and reproducible control of quantum cascade laser frequency scans having short (nanosecond) pulse excitations. In accordance with a preferred embodiment of the invention, a method of digital frequency control for pulsed quantum cascade lasers includes digitally synthesizing a sub-threshold current, converting the sub-threshold current to analog form, and generating laser pulses. Preferably, the sub-threshold current is synchronized to the laser pulses.