中国物理B ›› 2004, Vol. 13 ›› Issue (11): 1811-1814.doi: 10.1088/1009-1963/13/11/007

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Stochastic resonance of bias signal-modulated noise in a single-mode laser

吴大进1, 曹力2, 王俊3   

  1. (1)Chinese Centre of Advanced Science and Technology (World Laboratory), Beijing 100080, China; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; (2)State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Chinese Centre of Advanced Science and Technology (World Laboratory), Beijing 100080, China; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; (3)State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2003-08-01 修回日期:2004-04-13 出版日期:2004-11-20 发布日期:2005-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

Stochastic resonance of bias signal-modulated noise in a single-mode laser

Wang Jun (王俊)ac,  Cao Li (曹力)abc, Wu Da-Jin (吴大进)bc   

  1. a State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, Chinab Chinese Centre of Advanced Science and Technology (World Laboratory), Beijing 100080, China; c Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2003-08-01 Revised:2004-04-13 Online:2004-11-20 Published:2005-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

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摘要： Stochastic resonance (SR) for bias signal modulation is studied in a single-mode laser system. By investigating a gain-noise model driven by correlated pump noise and quantum noise, we find that, whether the correlation coefficient between both the noises is positive or negative, SR always appears in the dependence of signal-to-noise ratio (SNR) upon the noise correlation time and the frequency of the modulation signal. However, only when the correlation coefficient between both noises is negative can SR occur in the dependence of SNR upon the quantum noise intensity and pump noise intensity, while when the correlation coefficient between both noises is positive, it shows monotonically.

关键词: bias signal-modulated noise, stochastic resonance, linear approximation method

Abstract: Stochastic resonance (SR) for bias signal modulation is studied in a single-mode laser system. By investigating a gain-noise model driven by correlated pump noise and quantum noise, we find that, whether the correlation coefficient between both the noises is positive or negative, SR always appears in the dependence of signal-to-noise ratio (SNR) upon the noise correlation time and the frequency of the modulation signal. However, only when the correlation coefficient between both noises is negative can SR occur in the dependence of SNR upon the quantum noise intensity and pump noise intensity, while when the correlation coefficient between both noises is positive, it shows monotonically.

Key words: bias signal-modulated noise, stochastic resonance, linear approximation method

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

  • 42.60.Mi
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation) 42.60.Fc (Modulation, tuning, and mode locking) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps) 02.30.Mv (Approximations and expansions) 05.40.Ca (Noise) 02.50.Ey (Stochastic processes)