GENEVA, Oct. 5 -- Publication No. WO/2013/148368 was published on Oct. 3.
Title of the invention: "MULTI-SPECTRAL TERAHERTZ SOURCE AND IMAGING SYSTEM." Applicants: LONGWAVE PHOTONICS LLC (US). Inventors: Alan Wei Min Lee (US). According to the abstract* posted by the World Intellectual Property Organization: "A broadly tunable semiconductor laser source having at least two semiconductor lasers, composed of dissimilar gain media, positioned in close proximity to one another, with an optical element for collimating the output of the semiconductor lasers, and a dispersive element to overlap the collimated beams with a microelectronic controller, which switches each laser on and off and sets the bias conditions for each laser. The output beams can be made parallel by design of the grating dispersion in combination with the lens, with small aiming corrections provided by mechanical actuation of the grating. The tunable source can be used for spectroscopy and spectroscopic imaging over a broad frequency range where the gain media are chosen for emission at frequencies of interest." The patent was filed on March 15 under Application No. PCT/US2013/032611. *For further information, including images, charts and tables, please visit:
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