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Single-mode laser systems with modulated signals are studied by the method of numerical simulation. The signal-to-noise ratio, the output signal power, and the background noise power are analyzed near and far from the threshold. It is found that when the laser works near the threshold, the signal-to-noise ratio is present and the behavior of stochastic resonance takes place as the quantum noise increases, no matter whether the quantum noise is correlated with the pump noise. The correlation between the two noises, however, will increase the signal-to-noise ratio. And when the laser works far from the threshold, only when the two noises are correlated can the behavior of stochastic resonance appear. It is also found that the output signal power can be influenced by the noises. What is more, the simulation results are compared with those obtained by the method of linear approximation.
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Keywords:
- stochastic resonance /
- signal-to-noise ratio /
- output signal power /
- background noise power
[1] Gammaltoni L, Haggi P, Jung P, Marchesoni F 1998 Rev. Mod. Phys. 70 223
[2] Zhang L Y, Cao L, Wu D J, Wang J 2003 Chin. Phys. Lett. 20 25
[3] Zhang L Y, Cao L, Wu D J 2003 Acta Phys. Sin. 52 1174 (in Chinese) [张良英,曹力,吴大进2003 物理学报 52 1174]
[4] Zhang L Y, Jin G X, Cao L 2011 Acta Phys. Sin. 60 044207 (in Chinese) [张良英,金国祥,曹力2011 物理学报 60 044207]
[5] Chen D Y, Wang Z L 2009 Acta Phys. Sin. 58 102 ( in Chinese) [陈德彝,王忠龙2009 物理学报 58 102]
[6] Jin G X, Zhang L Y, Cao L 2009 Chin. Phys. B 18 0952
[7] Hernández-García E, Toral R, San Miguel M 1990 Phys. Rev. A 42 6823
[8] Gardiner C 1983 Handbook of Stochastic Processes (Berlin: Springer-Verlag) p86
[9] Honeycutt R L 1992 Phys. Rev. A 45 600
[10] McNamara B, Wiesenfeld K 1989 Phys. Rev. E 39 4854
[11] Evstigneev M, Pankov V, Prince R H 2001 J. Phys. A: Math. Gen. 34 2595
[12] Kang Y M, Xu J X, Xie Y 2003 Acta Phys. Sin. 52 2712 (in Chinese) [康艳梅,徐健学,谢勇2003 物理学报 52 2712]
[13] Agudov N V, Krichigin A V, Valenti D, Spagnolo B 2010 Phys. Rev. E 81 051123
[14] Góra P F 2005 Physica A 354 153
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[1] Gammaltoni L, Haggi P, Jung P, Marchesoni F 1998 Rev. Mod. Phys. 70 223
[2] Zhang L Y, Cao L, Wu D J, Wang J 2003 Chin. Phys. Lett. 20 25
[3] Zhang L Y, Cao L, Wu D J 2003 Acta Phys. Sin. 52 1174 (in Chinese) [张良英,曹力,吴大进2003 物理学报 52 1174]
[4] Zhang L Y, Jin G X, Cao L 2011 Acta Phys. Sin. 60 044207 (in Chinese) [张良英,金国祥,曹力2011 物理学报 60 044207]
[5] Chen D Y, Wang Z L 2009 Acta Phys. Sin. 58 102 ( in Chinese) [陈德彝,王忠龙2009 物理学报 58 102]
[6] Jin G X, Zhang L Y, Cao L 2009 Chin. Phys. B 18 0952
[7] Hernández-García E, Toral R, San Miguel M 1990 Phys. Rev. A 42 6823
[8] Gardiner C 1983 Handbook of Stochastic Processes (Berlin: Springer-Verlag) p86
[9] Honeycutt R L 1992 Phys. Rev. A 45 600
[10] McNamara B, Wiesenfeld K 1989 Phys. Rev. E 39 4854
[11] Evstigneev M, Pankov V, Prince R H 2001 J. Phys. A: Math. Gen. 34 2595
[12] Kang Y M, Xu J X, Xie Y 2003 Acta Phys. Sin. 52 2712 (in Chinese) [康艳梅,徐健学,谢勇2003 物理学报 52 2712]
[13] Agudov N V, Krichigin A V, Valenti D, Spagnolo B 2010 Phys. Rev. E 81 051123
[14] Góra P F 2005 Physica A 354 153
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