The submm wave Josephson flux flow oscillator; Linewidth measurements and simple theory

Jesper Mygind; V. P. Koshelets; Mogens Rugholm Samuelsen; Alexander Sobolev

doi:10.1109/TASC.2005.850143

The submm wave Josephson flux flow oscillator; Linewidth measurements and simple theory

Jesper Mygind
, V. P. Koshelets
, Mogens Rugholm Samuelsen
, Alexander Sobolev

Department of Physics

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

The Flux Flow Oscillator (FFO) is a long Josephson junction in which a DC bias current and a DC magnetic field maintain a unidirectional viscous flow of magnetic flux quanta. The theoretical linewidth of the electromagnetic radiation generated at the end boundary is due to internal current fluctuations as given by the usual expression for the lumped junction. Experimentally, however, the linewidth deviates significantly both in magnitude and functional dependence. We suggest a simple solution based on the assumption that the bias current creates an additional magnetic field in the junction. This is supported by linewidth measurements on FFO's subjected to different bias configurations.

Original language	English
Journal	I E E E Transactions on Applied Superconductivity
Volume	15
Issue number	2
Pages (from-to)	968-971
ISSN	1051-8223
DOIs	https://doi.org/10.1109/TASC.2005.850143
Publication status	Published - 2005

Bibliographical note

Copyright: 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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title = "The submm wave Josephson flux flow oscillator; Linewidth measurements and simple theory",

abstract = "The Flux Flow Oscillator (FFO) is a long Josephson junction in which a DC bias current and a DC magnetic field maintain a unidirectional viscous flow of magnetic flux quanta. The theoretical linewidth of the electromagnetic radiation generated at the end boundary is due to internal current fluctuations as given by the usual expression for the lumped junction. Experimentally, however, the linewidth deviates significantly both in magnitude and functional dependence. We suggest a simple solution based on the assumption that the bias current creates an additional magnetic field in the junction. This is supported by linewidth measurements on FFO's subjected to different bias configurations.",

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note = "Copyright: 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE",

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doi = "10.1109/TASC.2005.850143",

language = "English",

volume = "15",

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T1 - The submm wave Josephson flux flow oscillator; Linewidth measurements and simple theory

AU - Mygind, Jesper

AU - Koshelets, V. P.

AU - Samuelsen, Mogens Rugholm

AU - Sobolev, Alexander

N1 - Copyright: 2005 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

PY - 2005

Y1 - 2005

N2 - The Flux Flow Oscillator (FFO) is a long Josephson junction in which a DC bias current and a DC magnetic field maintain a unidirectional viscous flow of magnetic flux quanta. The theoretical linewidth of the electromagnetic radiation generated at the end boundary is due to internal current fluctuations as given by the usual expression for the lumped junction. Experimentally, however, the linewidth deviates significantly both in magnitude and functional dependence. We suggest a simple solution based on the assumption that the bias current creates an additional magnetic field in the junction. This is supported by linewidth measurements on FFO's subjected to different bias configurations.

AB - The Flux Flow Oscillator (FFO) is a long Josephson junction in which a DC bias current and a DC magnetic field maintain a unidirectional viscous flow of magnetic flux quanta. The theoretical linewidth of the electromagnetic radiation generated at the end boundary is due to internal current fluctuations as given by the usual expression for the lumped junction. Experimentally, however, the linewidth deviates significantly both in magnitude and functional dependence. We suggest a simple solution based on the assumption that the bias current creates an additional magnetic field in the junction. This is supported by linewidth measurements on FFO's subjected to different bias configurations.

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DO - 10.1109/TASC.2005.850143

M3 - Journal article

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JO - I E E E Transactions on Applied Superconductivity

JF - I E E E Transactions on Applied Superconductivity

IS - 2

ER -

The submm wave Josephson flux flow oscillator; Linewidth measurements and simple theory

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