THz Schottky diode harmonic mixers for QCL phase-locking

Berhanu T. Bulcha, David S. Kurtz, Christopher Groppi, Jeffrey L. Hesler, N. Scott Barker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

A fundamental 1.9-2.8 THz Schottky diode mixer has been modified to enable high harmonic mixing, thus allowing use of the mixer for phase locking of a quantum cascade laser (QCL) to an stable external microwave source. Phase locking to a reference will transfer the spectral line profile of the reference to the THz source; this will control the phase precisely. Stabilizing a QCL for a single frequency operation will help to reduce the drift due to temperature and other external biases. The mixer can be used for several applications, such as, heterodyne interferometer in far-infrared range and high-resolution heterodyne spectroscopy. The design and characterization of the harmonic mixer will be presented. A conversion loss of 63 dB for harmonic mixing at N=9 and 45 dB for N=3 were measured with a 2 THz input signal.

Original languageEnglish (US)
Title of host publication2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013
DOIs
StatePublished - Dec 1 2013
Event2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013 - Mainz, Germany
Duration: Sep 1 2013Sep 6 2013

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Other

Other2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2013
CountryGermany
CityMainz
Period9/1/139/6/13

Keywords

  • Conversation Loss
  • Harmonic Mixer
  • Phase locking
  • Video Response

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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