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Proceedings Paper

A 4.7THz heterodyne receiver for a balloon borne telescope
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Paper Abstract

We report on the performance of a high sensitivity 4.7 THz heterodyne receiver based on a NbN hot electron bolometer mixer and a quantum cascade laser (QCL) as local oscillator. The receiver is developed to observe the astronomically important neutral atomic oxygen [OI] line at 4.7448 THz on a balloon based telescope. The single-line frequency control and improved beam pattern of QCL have taken advantage of a third-order distributed feedback structure. We measured a double sideband receiver noise temperature (Trec(DSB)) of 815 K, which is ~ 7 times the quantum noise limit (hν/2kB). An Allan time of 15 s at an effective noise fluctuation bandwidth of 18 MHz is demonstrated. Heterodyne performance was further supported by a measured methanol line spectrum around 4.7 THz.

Paper Details

Date Published: 23 July 2014
PDF: 7 pages
Proc. SPIE 9153, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII, 91531R (23 July 2014); doi: 10.1117/12.2055790
Show Author Affiliations
D. J. Hayton, SRON Netherlands Institute for Space Research (Netherlands)
J. L. Kloosterman, The Univ. of Arizona (United States)
Y. Ren, Technische Univ. Delft (Netherlands)
T. Y. Kao, Massachusetts Institute of Technology (United States)
J. R. Gao, SRON Netherlands Institute for Space Research (Netherlands)
Technical Univ. Delft (Netherlands)
T. M. Klapwijk, Technische Univ. Delft (Netherlands)
Q. Hu, Massachusetts Institute of Technology (United States)
C. K. Walker, Steward Observatory, Univ. of Arizona (United States)
J. L. Reno, Sandia National Labs. (United States)


Published in SPIE Proceedings Vol. 9153:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VII
Wayne S. Holland; Jonas Zmuidzinas, Editor(s)

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