中国物理B ›› 2005, Vol. 14 ›› Issue (6): 1159-1167.doi: 10.1088/1009-1963/14/6/018

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Time evolution of the intensity correlation function in a single-mode laser driven by both the coloured pump noise with signal modulation and the quantum noise with cross-correlation between the real and imaginary parts

徐大海1, 曹力2, 吴大进2, 程庆华3   

  1. (1)School of Physics Science and Technology, Yangtze University ,Jingzhou 434100,China; (2)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; (3)State Key Laboratory of Laser Technology,Huazhong University of Science and Technology,Wuhan 430074,China;School of Physics Science and Technology, Yangtze University ,Jingzhou 434100,China
  • 收稿日期:2004-07-12 修回日期:2005-02-19 出版日期:2005-05-27 发布日期:2005-05-27
  • 基金资助:
    Project supported by the National Natural Science Foundation Of China(Grant No 10275025) and the Emphases Item of Education Office of Hubei Province China(Grant No 2003A001

Time evolution of the intensity correlation function in a single-mode laser driven by both the coloured pump noise with signal modulation and the quantum noise with cross-correlation between the real and imaginary parts

Cheng Qing-Hua (程庆华)ab, Cao Li (曹力)ac, Xu Da-Hai (徐大海)b, Wu Da-Jin (吴大进)ac    

  1. a State Key Laboratory of Laser Technology,Huazhong University of Science and Technology, Wuhan 430074, China; b School of Physics Science and Technology, Yangtze University, Jingzhou 434100, China;c Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2004-07-12 Revised:2005-02-19 Online:2005-05-27 Published:2005-05-27
  • Supported by:
    Project supported by the National Natural Science Foundation Of China(Grant No 10275025) and the Emphases Item of Education Office of Hubei Province China(Grant No 2003A001

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摘要： Using the linear approximation, we have studied the time evolution of intensity correlation function C（t） in a single-mode laser driven by both the colored pump noise with signal modulation and the quantum noise with cross-correlation between its real and imaginary parts. In the case of the pump noise self-correlation time, we find that the time evolution of C（t） varies with modulation signal frequency Ω, amplitude B, and net gain ɑ0. (i) As the Ω increases, the time evolution of C（t） experiences a process changing from the monotonous descension to the descension with a flat appearing initially, and finally to the a form of damping oscillation; (ii) As the B increases, it experiences from monotonous descension to the appearance of a maximum; (iii) As the net gain ɑ0 increases, it experiences a process repeatedly changing from the monotonous descension to monotonous ascension, and to the appearance of a maximum, finally to monotonous descension again. However, in the case of, the time evolution of C（t） only exhibits a form of damping oscillation .

关键词: noise, single-mode laser, intensity correlation function

Abstract: Using the linear approximation, we have studied the time evolution of intensity correlation function C(t) in a single-mode laser driven by both the coloured pump noise with signal modulation and the quantum noise with cross-correlation between its real and imaginary parts. In the case of the pump noise with self-correlation time τ<<1, we find that the time evolution of C(t) varies with modulation signal frequency Ω, amplitude B and net gain a0. (i) As Ω increases, the time evolution of C(t) changes from monotonically descending to flat descending and finally to damply oscillating; (ii) as B increases, it changes from monotonically descending to maximal; (iii) as net gain a0 increases, it changes repeatedly from monotonically descending to monotonically ascending and to maximal, finally to monotonically descending again. However, in the case of τ>>1, the time evolution of C(t) only exhibits a form of damping oscillation.

Key words: noise, single-mode laser, intensity correlation function

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

  • 42.50.Lc
42.60.Fc (Modulation, tuning, and mode locking)