Intensity correlation time of a single-mode laser driven by two coloured noises with coloured cross-correlation with direct signal modulation
Chen Li-Mei (陈黎梅)ab, Cao Li (曹力)ad, Wu Da-Jin (吴大进)cd, Wang Zhong-Long (王忠龙)c
a State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; b Department of Physics, Shenzhen University, Shenzhen 518057, China; c Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; d China Centre of Advanced Science and Technology (World Laboratory), Beijing 100080, China
Abstract In this paper, the intensity correlation time T is studied for the gain-noise model of a single-mode laser driven by coloured pump noise and coloured quantum noise with coloured cross-correlation with a direct signal modulation. By using the linear approximation method, it is found that when the pump noise is modulated directly by a signal, the effects of the cross-correlation between the pump noise and the quantum noise will disappear. In addition, there exists a maximum (i.e. resonance) in the curve of the intensity correlation time $T$ versus the pump noise self-correlation time $\tau_1$. Furthermore, when $\tau_1\leq \tau_2$, the intensity correlation time T increases monotonically with the increase of $D$ and decreases monotonically with the increase of Q, but when $\tau_1>\tau_2$, the intensity correlation time T increases monotonically with the increase of Q and decreases monotonically with the increase of D.
Received: 11 August 2004
Revised: 13 December 2004
Accepted manuscript online:
PACS:
42.50.Lc
(Quantum fluctuations, quantum noise, and quantum jumps)
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10275025).
Cite this article:
Chen Li-Mei (陈黎梅), Cao Li (曹力), Wu Da-Jin (吴大进), Wang Zhong-Long (王忠龙) Intensity correlation time of a single-mode laser driven by two coloured noises with coloured cross-correlation with direct signal modulation 2005 Chinese Physics 14 764
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