中国物理B ›› 2008, Vol. 17 ›› Issue (1): 76-79.doi: 10.1088/1674-1056/17/1/014

• GENERAL • 上一篇    下一篇

Effects of correlations between the real and imaginary parts of quantum noise on intensity fluctuation for a saturation laser model

李跃宏, 梅冬成   

  1. Department of Physics, Yunnan University, Kunming 650091, China
  • 出版日期:2008-01-20 发布日期:2008-01-20
  • 基金资助:
    Project supported by the Natural Science Foundation of Yunnan Province, China (Grant No 2006A0002M).

Effects of correlations between the real and imaginary parts of quantum noise on intensity fluctuation for a saturation laser model

Li Yue-Hong(李跃宏) and Mei Dong-Cheng(梅冬成)†   

  1. Department of Physics, Yunnan University, Kunming 650091, China
  • Online:2008-01-20 Published:2008-01-20
  • Supported by:
    Project supported by the Natural Science Foundation of Yunnan Province, China (Grant No 2006A0002M).

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摘要： This paper studies the effects of cross-correlations between the real and imaginary parts of quantum noise on the laser intensity in a saturation laser model. It derives the analytic expressions of the intensity correlation function ${C(\tau)}$ and the associated relaxation time ${T({C})}$ in the case of a stable locked phase resulting from the cross-correlation ${\lambda_q}$ between the real and imaginary parts of quantum noise. Based on numerical computations it finds that the presence of cross correlations between the real and imaginary parts of quantum noise slow down the decay of intensity fluctuation, i.e., it causes the increase of intensity fluctuation.

Abstract: This paper studies the effects of cross-correlations between the real and imaginary parts of quantum noise on the laser intensity in a saturation laser model. It derives the analytic expressions of the intensity correlation function ${C(\tau)}$ and the associated relaxation time ${T({C})}$ in the case of a stable locked phase resulting from the cross-correlation ${\lambda_q}$ between the real and imaginary parts of quantum noise. Based on numerical computations it finds that the presence of cross correlations between the real and imaginary parts of quantum noise slow down the decay of intensity fluctuation, i.e., it causes the increase of intensity fluctuation.

Key words: saturation laser model, correlated noises, correlation function

中图分类号:  (Quantum fluctuations, quantum noise, and quantum jumps)

  • 42.50.Lc
05.40.Ca (Noise)