Stochastic resonance in a single-mode laser driven by frequency modulated signal and coloured noises
Jin Guo-Xiang(金国祥)a)†, Zhang Liang-Ying(张良英)b), and Cao Li(曹力)c)
aSchool of Computer Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China; bDepartment of Physics & Electronics Information Technology, Xiangfan University, Xiangfan 441053, China; c State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Abstract By adding frequency modulated signals to the intensity equation of gain--noise model of the single-mode laser driven by two coloured noises which are correlated, this paper uses the linear approximation method to calculate the power spectrum and signal-to-noise ratio (SNR) of the laser intensity. The results show that the SNR appears typical stochastic resonance with the variation of intensity of the pump noise and quantum noise. As the amplitude of a modulated signal has effects on the SNR, it shows suppression, monotone increasing, stochastic resonance, and multiple stochastic resonance with the variation of the frequency of a carrier signal and modulated signal.
Received: 03 July 2008
Revised: 19 August 2008
Accepted manuscript online:
(Quantum fluctuations, quantum noise, and quantum jumps)
Fund: Project supported by
the Key Project Scientific Research Foundation from the Education
Department of Hubei Province of China (Grant No D200725001).
Cite this article:
Jin Guo-Xiang(金国祥), Zhang Liang-Ying(张良英), and Cao Li(曹力) Stochastic resonance in a single-mode laser driven by frequency modulated signal and coloured noises 2009 Chin. Phys. B 18 952
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