中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1389-1393.doi: 10.1088/1674-1056/18/4/017

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Stochastic resonance in a single-mode laser driven by quadratic pump noise and amplitude-modulated signal

张莉   

  1. College of Electrics and Information Engineering, South-Central University for Nationalities, Wuhan 430074, China
  • 收稿日期:2008-10-06 修回日期:2008-10-28 出版日期:2009-04-20 发布日期:2009-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

Stochastic resonance in a single-mode laser driven by quadratic pump noise and amplitude-modulated signal

Zhang Li(张莉)   

  1. College of Electrics and Information Engineering, South-Central University for Nationalities, Wuhan 430074, China
  • Received:2008-10-06 Revised:2008-10-28 Online:2009-04-20 Published:2009-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

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摘要： This paper investigates the phenomenon of stochastic resonance in a single-mode laser driven by quadratic pump noise and amplitude-modulated signal. A new linear approximation approach is advanced to calculate the signal-to-noise ratio. In the linear approximation only the drift term is linearized, the multiplicative noise term is unchangeable. It is found that there appears not only the standard form of stochastic resonance but also the broad sense of stochastic resonance, especially stochastic multiresonance appears in the curve of signal-to-noise ratio as a function of coupling strength λ between the real and imaginary parts of the pump noise.

关键词: quadratic pump noise, new linear approximation, stochastic resonance

Abstract: This paper investigates the phenomenon of stochastic resonance in a single-mode laser driven by quadratic pump noise and amplitude-modulated signal. A new linear approximation approach is advanced to calculate the signal-to-noise ratio. In the linear approximation only the drift term is linearized, the multiplicative noise term is unchangeable. It is found that there appears not only the standard form of stochastic resonance but also the broad sense of stochastic resonance, especially stochastic multiresonance appears in the curve of signal-to-noise ratio as a function of coupling strength $\lambda$ between the real and imaginary parts of the pump noise.

Key words: quadratic pump noise, new linear approximation, stochastic resonance

中图分类号:  (Dynamical laser instabilities; noisy laser behavior)

  • 42.60.Mi
05.40.Ca (Noise) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)