Linewidth and phase locking of Josephson flux flow oscillators

Jesper Mygind; V. P. Koshelets; S. V. Shitov; L. V. Filippenko; V. L. Vaks; A. M. Baryshev

doi:10.1016/S0921-4534(99)00691-7

Linewidth and phase locking of Josephson flux flow oscillators

Jesper Mygind, V. P. Koshelets, S. V. Shitov, L. V. Filippenko, V. L. Vaks, A. M. Baryshev

Department of Physics

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

Abstract

We report on measurements of the linewidth of the emitted radiation from Josephson Flux Row Oscillators (FFOs). Frequency and phase locking to an external 10 MHz reference oscillator an demonstrated experimentally in the frequency range 270-440 GHz. A linewidth as low as 1 Hz (as determined by the resolution bandwidth of the spectrum analyzer) has been measured. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The damping mechanisms are discussed and related to the self-excitation Of quasiparticles. Narrow linewidth, wide-band tunability and low noise are important for radio astronomy and air- and space-borne spectroscopy for atmospheric research and environmental monitoring. (C) 2000 Elsevier Science B.V. All rights reserved.

Original language	English
Journal	Physica C: Superconductivity and its Applications
Volume	332
Issue number	1-4
Pages (from-to)	302-307
ISSN	0921-4534
DOIs	https://doi.org/10.1016/S0921-4534(99)00691-7
Publication status	Published - 2000

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title = "Linewidth and phase locking of Josephson flux flow oscillators",

abstract = "We report on measurements of the linewidth of the emitted radiation from Josephson Flux Row Oscillators (FFOs). Frequency and phase locking to an external 10 MHz reference oscillator an demonstrated experimentally in the frequency range 270-440 GHz. A linewidth as low as 1 Hz (as determined by the resolution bandwidth of the spectrum analyzer) has been measured. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The damping mechanisms are discussed and related to the self-excitation Of quasiparticles. Narrow linewidth, wide-band tunability and low noise are important for radio astronomy and air- and space-borne spectroscopy for atmospheric research and environmental monitoring. (C) 2000 Elsevier Science B.V. All rights reserved. ",

author = "Jesper Mygind and Koshelets, {V. P.} and Shitov, {S. V.} and Filippenko, {L. V.} and Vaks, {V. L.} and Baryshev, {A. M.}",

year = "2000",

doi = "10.1016/S0921-4534(99)00691-7",

language = "English",

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TY - JOUR

T1 - Linewidth and phase locking of Josephson flux flow oscillators

AU - Mygind, Jesper

AU - Koshelets, V. P.

AU - Shitov, S. V.

AU - Filippenko, L. V.

AU - Vaks, V. L.

AU - Baryshev, A. M.

PY - 2000

Y1 - 2000

N2 - We report on measurements of the linewidth of the emitted radiation from Josephson Flux Row Oscillators (FFOs). Frequency and phase locking to an external 10 MHz reference oscillator an demonstrated experimentally in the frequency range 270-440 GHz. A linewidth as low as 1 Hz (as determined by the resolution bandwidth of the spectrum analyzer) has been measured. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The damping mechanisms are discussed and related to the self-excitation Of quasiparticles. Narrow linewidth, wide-band tunability and low noise are important for radio astronomy and air- and space-borne spectroscopy for atmospheric research and environmental monitoring. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - We report on measurements of the linewidth of the emitted radiation from Josephson Flux Row Oscillators (FFOs). Frequency and phase locking to an external 10 MHz reference oscillator an demonstrated experimentally in the frequency range 270-440 GHz. A linewidth as low as 1 Hz (as determined by the resolution bandwidth of the spectrum analyzer) has been measured. This linewidth is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. The damping mechanisms are discussed and related to the self-excitation Of quasiparticles. Narrow linewidth, wide-band tunability and low noise are important for radio astronomy and air- and space-borne spectroscopy for atmospheric research and environmental monitoring. (C) 2000 Elsevier Science B.V. All rights reserved.

U2 - 10.1016/S0921-4534(99)00691-7

DO - 10.1016/S0921-4534(99)00691-7

M3 - Journal article

SN - 0921-4534

VL - 332

SP - 302

EP - 307

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

ER -

Linewidth and phase locking of Josephson flux flow oscillators

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