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:
May. 25, 2010
Filed:
Oct. 10, 2006
Delmar L. Barker, Tucson, AZ (US);
William R. Owens, Tucson, AZ (US);
Abram G. Young, Tucson, AZ (US);
Delmar L. Barker, Tucson, AZ (US);
William R. Owens, Tucson, AZ (US);
Abram G. Young, Tucson, AZ (US);
Raytheon Company, Waltham, MA (US);
Abstract
A system and method for modulating the frequency of electromagnetic radiation utilizes a frozen shockwave in a photonic band gap structure. The structure provides a discontinuity in lattice constant that functions as a shockwave, and that does not shift its position within the structure. In addition the modulation device or structure includes an acoustic pulse generator, such as a piezoelectric transducer coupled to one end of the photonic band gap structure. The acoustic pulse generator may be driven to produce a periodic pulse in the photonic band gap structure. The frozen shockwave, a defect or discontinuity in the photonic band gap structure, is used to hold incoming electromagnetic radiation in place. The acoustic pulse passing through the photonic band gap structure Doppler shifts the frequency of the radiation. The frequency-shifted radiation is then ejected out of the frozen shockwave portion of the photonic band gap structure.