中国物理B ›› 2009, Vol. 18 ›› Issue (3): 952-957.doi: 10.1088/1674-1056/18/3/019

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Stochastic resonance in a single-mode laser driven by frequency modulated signal and coloured noises

张良英1, 金国祥2, 曹力3   

  1. (1)Department of Physics & Electronics Information Technology, Xiangfan University, Xiangfan 441053, China; (2)School of Computer Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China; (3)State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2008-07-03 修回日期:2008-08-19 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the Key Project Scientific Research Foundation from the Education Department of Hubei Province of China (Grant No D200725001).

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)   

  1. a School of Computer Science and Engineering, Wuhan Institute of Technology, Wuhan 430073, China; b Department 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
  • Received:2008-07-03 Revised:2008-08-19 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the Key Project Scientific Research Foundation from the Education Department of Hubei Province of China (Grant No D200725001).

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摘要： 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.

关键词: Gaussian coloured noise, single-mode laser, stochastic resonance, frequency modulated signal

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.

Key words: Gaussian coloured noise, single-mode laser, stochastic resonance, frequency modulated signal

中图分类号:  (Modulation, tuning, and mode locking)

  • 42.60.Fc
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.60.Mi (Dynamical laser instabilities; noisy laser behavior) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)