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Proceedings Paper

Heterodyne receiver at 2.5 THz with quantum cascade laser and hot electron bolometric mixer
Author(s): H.-W. Hübers; S. G. Pavlov; H. Richter; A. D. Semenov; L. Mahler; A. Tredicucci; H. E. Beere; D. A. Ritchie
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Paper Abstract

Quantum cascade lasers (QCLs) operating at 2.5 THz have been used for gas phase spectroscopy and as local oscillator in a heterodyne receiver. One QCL has a Fabry-Perot resonator while the other has a distributed feedback resonator. The linewidth and frequency tunability of both QCLs have been investigated by either mixing two modes of the QCL or by mixing the emission from the QCL with the emission from a 2.5 THz gas laser. The frequency tunability as well as the linewidth is sufficient for Doppler limited spectroscopy of methanol gas. The QCLs have been used successfully as local oscillators in a heterodyne receiver. Noise temperature measurements with a hot electron bolometer and a QCL yielded the same result as with a gas laser as local oscillator.

Paper Details

Date Published: 27 June 2006
PDF: 9 pages
Proc. SPIE 6275, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III, 62750H (27 June 2006); doi: 10.1117/12.671395
Show Author Affiliations
H.-W. Hübers, German Aerospace Ctr. (Germany)
S. G. Pavlov, German Aerospace Ctr. (Germany)
H. Richter, German Aerospace Ctr. (Germany)
A. D. Semenov, German Aerospace Ctr. (Germany)
L. Mahler, NEST, CNR-INFM (Italy)
Scuola Normale Superiore (Italy)
A. Tredicucci, NEST, CNR-INFM (Italy)
Scuola Normale Superiore (Italy)
H. E. Beere, Cavandish Lab., Univ. of Cambridge (United Kingdom)
D. A. Ritchie, Cavandish Lab., Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 6275:
Millimeter and Submillimeter Detectors and Instrumentation for Astronomy III
Jonas Zmuidzinas; Wayne S. Holland; Stafford Withington; William D. Duncan, Editor(s)

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