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Amplitude-phase coupling effects on the spectral lineshape of oscillators
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Paper Abstract

In this paper we discuss the effects of white noise on the spectral lineshape of a simple two dimensional oscillator and compare to the phase noise spectrum predicted by the methods of Demir and Kaertner. A numerical method based on the Fokker-Planck equation is employed to directly calculate the spectrum of the dynamical system. These results are then used as a benchmark to assess the efficiency of a novel small-noise perturbation method we have developed. Due to the simplicity of the oscillator it is possible to solve the approximated partial differential equation using both characteristics; these solutions are then compared to the exact numerical results. We elucidate the effect of the amplitude-phase coupling term which causes the spectral lineshape to become non-Lorentzian.

Paper Details

Date Published: 23 May 2005
PDF: 11 pages
Proc. SPIE 5847, Noise in Communication Systems, (23 May 2005); doi: 10.1117/12.609124
Show Author Affiliations
Fergal O'Doherty, Univ. College Cork (Ireland)
James P. Gleeson, Univ. College Cork (Ireland)

Published in SPIE Proceedings Vol. 5847:
Noise in Communication Systems
Costas N. Georghiades; Langford B. White, Editor(s)

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