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

V.P. Koshelets; S.V. Shitov; A.V. Shchukin; L.V. Filippenko; Jesper Mygind; A.V. Ustinov

doi:10.1103/PhysRevB.56.5572

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

V.P. Koshelets, S.V. Shitov, A.V. Shchukin, L.V. Filippenko, Jesper Mygind, A.V. Ustinov

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Abstract

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.

Original language	English
Journal	Physical Review B
Volume	56
Issue number	9
Pages (from-to)	5572-5577
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.56.5572
Publication status	Published - 1997

Bibliographical note

Copyright (1997) by the American Physical Society.

Keywords

STATES
GHZ
MILLIMETER
SUBMILLIMETER WAVE REGION
JUNCTIONS

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http://link.aps.org/doi/10.1103/PhysRevB.56.5572

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title = "Self-pumping effects and radiation linewidth of Josephson flux-flow oscillators",

abstract = "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.",

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author = "V.P. Koshelets and S.V. Shitov and A.V. Shchukin and L.V. Filippenko and Jesper Mygind and A.V. Ustinov",

note = "Copyright (1997) by the American Physical Society.",

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doi = "10.1103/PhysRevB.56.5572",

language = "English",

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journal = "Physical Review B",

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T1 - Self-pumping effects and radiation linewidth of Josephson flux-flow oscillators

AU - Koshelets, V.P.

AU - Shitov, S.V.

AU - Shchukin, A.V.

AU - Filippenko, L.V.

AU - Mygind, Jesper

AU - Ustinov, A.V.

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

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KW - MILLIMETER

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

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Bibliographical note

Keywords

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