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Journal article

Self-pumping effects and radiation linewidth of Josephson flux-flow oscillators

By Koshelets, V.P.1; Shitov, S.V.1; Shchukin, A.V.1; Filippenko, L.V.1; Mygind, Jesper2,3; Ustinov, A.V.4

From

Russian Academy of Sciences1

Biophysics and Fluids, Department of Physics, Technical University of Denmark2

Department of Physics, Technical University of Denmark3

Friedrich-Alexander University Erlangen-Nürnberg4

Flux-flow oscillators (FFO's) are being developed for integration with a SIS mixer for use in submillimeter wave receivers, The present work contains a detailed experimental study of the dc, microwave, and noise properties of Nb-AlOx-Nb FFO's, A model based on the Josephson self-pumping effect is proposed for an explanation of the experimental current-voltage characteristics.

A reliable technique based on harmonic mixing is used to determine the spectral Linewidth of the radiation emitted by the integrated FFO's up to 600 GHz. Comprehensive measurements of the dependence of the Linewidth on the dynamic resistance and the applied magnetic field have been performed. In the resonant regime a linewidth as small as 200 kHz is obtained at 450 GHz.

The experimental data are compared with recent theoretical predictions.

Language: English
Year: 1997
Pages: 5572-5577
ISSN: 1550235x , 24699950 , 10953795 and 01631829
Types: Journal article
DOI: 10.1103/PhysRevB.56.5572
ORCIDs: Mygind, Jesper
Keywords

GHZ JUNCTIONS MILLIMETER STATES SUBMILLIMETER WAVE REGION

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