Minimizing the linewidth of the Flux-Flow Oscillator

Abstract

For the first time the linewidth of Flux-Flow Oscillator has been calculated by direct computer simulation of the sine-Gordon equation with noise. Nearly perfect agreement of the numerical results with the formula derived in [Phys. Rev. B, {\bf 65}, 054504 (2002)] has been achieved. It has been demonstrated that for homogeneous bias current distribution the linewidth actually does not depend on the junction length for practically interesting parameters range. Depending on the length of the unbiased tail, the power may be maximized and the linewidth may be minimized in a broad range of bias currents. The linewidth can be decreased further by 1.5 times by proper load matching.

arXiv comment4 pages, 6 figures

References in corpus (3)

• Form and width of spectral line of Josephson Flux-Flow oscillator
• Long Josephson junctions with spatially inhomogeneous driving
• Coupling of Josephson flux-flow oscillators to an external RC load

Cited by in corpus (4)

• Josephson Flux Flow Oscillator: the Microscopic Tunneling Approach
• The effect of bias feed profile on spectral properties of noisy Josephson flux flow oscillator
• Thermal flux-flow regime in long Josephson tunnel junctions
• Effect of 2${}^{\text{nd}}$ harmonic current--phase relation on a behavior of a Josephson Traveling Wave Parametric Amplifier