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Frontend for a 2.5-THz heterodyne spectrometer without liquid cryogen

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10 Author(s)
Richter, H. ; Inst. of Planetary Res., German Aerosp. Center (DLR), Berlin, Germany ; Semenov, A.D. ; Pavlov, S.G. ; Mahler, L.
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As part of a study for a second generation heterodyne spectrometer on SOFIA we are developing a 2.5-THz frontend which is implemented in a pulse-tube cooler. It consists of a quantum-cascade laser as local oscillator and a phonon-cooled NbN hot electron bolometric mixer. Frequency stabilization to below 300 kHz full width at half maximum is achieved by locking to a molecular absorption line. We will present the design and performance of the frontend and discuss the prospects for an application on board of SOFIA.

Published in:

Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on

Date of Conference:

2-7 Oct. 2011