A liquid cryogen-free terahertz heterodyne receiver in a pulse tube cooler has been realized. The receiver operates at 2.5 THz. It is based on a quantum cascade laser (QCL) as local oscillator and a hot electron bolometric mixer. A detailed study of the QCL beam quality yielded a beam propagation factor of 1.1-1.2. The double sideband noise temperature of the system is 2000 K and when corrected for optical losses in the signal path it is similar to 800 K. (C) 2008 American Institute of Physics.
Autori interni: | |
Autori: | Richter H.; Semenov A. D.; Pavlov S. G.; Mahler L.; Tredicucci A.; Beere H. E.; Ritchie D. A.; Il'in K. S.; Siegel M.; Hubers H.-W. |
Titolo: | Terahertz heterodyne receiver with quantum cascade laser and hot electron bolometer mixer in a pulse tube cooler |
Anno del prodotto: | 2008 |
Digital Object Identifier (DOI): | 10.1063/1.2988896 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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