US Patent Issued to Emcore on Dec. 10 for "Terahertz frequency domain spectrometer with frequency shifting of source laser beam" (California Inventors)

ALEXANDRIA, Va., Dec. 10 -- United States Patent no. 8,604,433, issued on Dec. 10, was assigned to Emcore Corp. (Albuquerque, N.M.).

http://www.laserfocusworld.com/news/2013/12/11/us-patent-issued-to-emcore-on-dec-10-for-terahertz-frequency-domain-spectrometer-with-frequency-shif.html

"Terahertz frequency domain spectrometer with frequency shifting of source laser beam" was invented by Ronald T. Logan Jr. (Pasadena, Calif.) and Joseph R. Demers (North Hollywood, Calif.). According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for analyzing, identifying or imaging an target including first and second laser beams coupled to a pair of photoconductive switches to produce CW signals in one or more bands in a range of frequencies greater than 100 GHz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral heterodyne process to generate an electrical signal representative of some characteristics of the target. The lasers are tuned to different frequencies and a frequency shifter in the path of one laser beam allows the terahertz beam to be finely adjusted in one or more selected frequency bands." The patent was filed on Aug. 23, 2010, under Application No. 12/861,651. *For further information, including images, charts and tables, please visit:

http://patft.uspto.gov/netacgi/nph-Parser?