ISSTT Proceedings

ISSTT Proceedings

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A novel terahertz heterodyne receiver based on a quantum cascade laser and a superconducting bolometer

Authors:
J.R. Gao, J.N. Hovenier, Z.Q. Yang, J.J.A. Baselmans, A. Baryshev, M. Hajenius, T.M. Klapwijk, A.J.L. Adam, T.O. Klaassen, B.S. Williams, S. Kumar, Q. Hu, J.L. Reno
Abstract:
We report the first demonstration of an all solid-state heterodyne receiver that can be used for high-resolution spectroscopy above 2 THz suitable for space-based observatories. The receiver uses a NbN superconducting hot electron bolometer as mixer and a quantum cascade laser operating at 2.8 THz as local oscillator. We measure a double sideband receiver noise temperature of 1400 K at 2.8 THz and 4.2 K, uncorrected for losses in the optics, and find that the free-running QCL has sufficient power stability for a practical receiver, demonstrating an unprecedented combination of sensitivity and stability. The output power of the QCL is more than adequate for use with HEB’s. The complete system provides a unique solution for high-resolution THz spectroscopy for astronomy as well as Earth science in space.
Categories:
Sources
Year:
2005
Session:
2
Full-text:
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Page Number(s):
19-23