SIS Mixers as a Noise Detector for Optimization of Photonic Local Oscillators in Terahertz Range

We have demonstrated that a superconductor-insulator-superconductor (SIS) mixer is applicable for a power detector to evaluate the sideband noise radiated from a submillimeter-wave local oscillator (LO) under development. A simple analysis shows SIS mixers provide better resolution of LO noise than...

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Bibliographic Details
Published inIEEE transactions on applied superconductivity Vol. 19; no. 3; pp. 389 - 394
Main Authors Kohjiro, S., Kikuchi, K., Maezawa, M., Furuta, T., Wakatsuki, A., Shimizu, N., Nagatsuma, T., Kado, Y., Ito, H., Shoji, A.
Format Journal Article Conference Proceeding
LanguageEnglish
Published New York, NY IEEE 01.06.2009
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
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Summary:We have demonstrated that a superconductor-insulator-superconductor (SIS) mixer is applicable for a power detector to evaluate the sideband noise radiated from a submillimeter-wave local oscillator (LO) under development. A simple analysis shows SIS mixers provide better resolution of LO noise than Schottky barrier diode mixers when the available LO power is less than ~ 0.4 mW. Systematic measurement of dependence of receiver noise temperature T RX on components and operational conditions of a photonic LO (Ph-LO) is carried out, which provides a guide to their optimization, e.g., source-laser power, photodiode drive current, use of an optical filter, and selection of an optical amplifier. Noise temperature of the Ph-LO estimated from experimental results ranges from ~ 1 times 10 3 K to ~ 5 times 10 4 K as a function of operational conditions and parameters.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2009.2017949