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. 05, 2011
Filed:
Mar. 14, 2008
Mikhail A. Belkin, Austin, TX (US);
Federico Capasso, Cambridge, MA (US);
Alexey Belyanin, College Station, TX (US);
Mikhail A. Belkin, Austin, TX (US);
Federico Capasso, Cambridge, MA (US);
Alexey Belyanin, College Station, TX (US);
President and Fellows of Harvard College, Cambridge, MA (US);
The Texas A&M University System, College Station, TX (US);
Harvard University & Medical School, Boston, MA (US);
Abstract
Apparatus and methods for generating radiation via difference frequency generation (DFG). In one exemplary implementation, a quantum cascade laser (QCL) has a significant second-order nonlinear susceptibility (χ) integrated in an active region of the QCL. The QCL is configured to generate first radiation at a first frequency ω, second radiation at a second frequency ω, and third radiation at a third frequency ω=ω−ωbased on difference frequency generation (DFG) arising from the non-linear susceptibility. In one aspect, the QCL may be configured to generate appreciable THz radiation at room temperature.