Open AccessTHz transceiver characterization : LDRD project 139363 final report.
Author(s) -
Christopher Nordquist,
Michael C. Wanke,
Michael Joseph Cich,
John L. Reno,
Charles E Fuller,
Joel R. Wendt,
Mark Lee,
Albert D. Grine
Publication year - 2009
Language(s) - English
Resource type - Reports
DOI - 10.2172/993890
Subject(s) - terahertz radiation , heterodyne (poetry) , superheterodyne receiver , local oscillator , schottky diode , optoelectronics , quantum cascade laser , diode , heterodyne detection , waveguide , intermediate frequency , transceiver , laser , signal (programming language) , optics , materials science , physics , radio frequency , engineering , electrical engineering , computer science , phase noise , cmos , acoustics , programming language
LDRD Project 139363 supported experiments to quantify the performance characteristics of monolithically integrated Schottky diode + quantum cascade laser (QCL) heterodyne mixers at terahertz (THz) frequencies. These integrated mixers are the first all-semiconductor THz devices to successfully incorporate a rectifying diode directly into the optical waveguide of a QCL, obviating the conventional optical coupling between a THz local oscillator and rectifier in a heterodyne mixer system. This integrated mixer was shown to function as a true heterodyne receiver of an externally received THz signal, a breakthrough which may lead to more widespread acceptance of this new THz technology paradigm. In addition, questions about QCL mode shifting in response to temperature, bias, and external feedback, and to what extent internal frequency locking can improve stability have been answered under this project.
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