Open AccessStochastic resonance of frequency modulated signals in a linear model of single-mode laser
Author(s) -
Liangying Zhang,
Guoxiang Jin,
Cao Li
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.4706
Subject(s) - stochastic resonance , physics , amplitude , white noise , noise (video) , signal (programming language) , laser , resonance (particle physics) , optics , quantum noise , noise spectral density , relative intensity noise , spectral density , noise figure , atomic physics , semiconductor laser theory , quantum , quantum mechanics , optoelectronics , telecommunications , computer science , amplifier , cmos , artificial intelligence , image (mathematics) , programming language
By adding frequency modulated signal to the equation of the laser intensity of the gain-noise model of the single-mode lasers, we use the linear approximation method to calculate the power spectrum and signal-to-noise ratio (SNR) of the laser intensity, which is driven by two white noises correlated in the form of δ function. The result shows that the SNR shows typical stochastic resonance with the change of intensities of the pump noise and quantum noise. As the amplitude of a modulated signal has an effect on the SNR it shows suppression, monotonic increase, resonance, suppression and resonance and so on with the varing of the frequencies of the carrier signal and modulated signal.