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:
Aug. 24, 2010
Filed:
Aug. 15, 2008
Kwang Ryong OH, Daejeon, KR;
Jong Hoi Kim, Daejeon, KR;
Dong Churl Kim, Daejeon, KR;
OH Kee Kwon, Daejeon, KR;
Ki Soo Kim, Daejeon, KR;
Ki Hong Yoon, Daegu, KR;
Kwang Ryong Oh, Daejeon, KR;
Jong Hoi Kim, Daejeon, KR;
Dong Churl Kim, Daejeon, KR;
Oh Kee Kwon, Daejeon, KR;
Ki Soo Kim, Daejeon, KR;
Ki Hong Yoon, Daegu, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Provided is a frequency-tunable terahertz light source device. The frequency-tunable terahertz light source device satisfies a Littrow diffraction condition at a wavelength and simultaneously satisfies a Littman-Metcalf diffraction condition at another wavelength using a double diffraction grating having two grating periods. Thus, oscillations simultaneously occur at the two different wavelengths, such that a terahertz wave can be stably generated by beating of the two oscillation wavelengths. In addition, the frequency-tunable terahertz light source device can readily change a frequency up to several terahertz and can be fabricated in a small size.