Influence of Noise on Time Evolution of Intensity Correlation Function |
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| Authors: | CHENG Qing-Hua CAO Li XU Da Hai WU Da-Jin |
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| Affiliation: | 1. School of Physical Science and Technology, Yangtze University, Jingzhou 434100, China;2. State Key Laboratory of Laser Technology, Huazhong Universityof Science and Technology, Wuhan 430074, China;3. CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China |
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| Abstract: | Using the linear approximation method, we have studied how the correlation function C(t) of the laser intensity changes with time in the loss-noise model of the single-mode laser driven by the colored pump noise with signal modulation and the quantum noisewith cross-correlation between the real and imaginary parts. We have found that when the pump noise self-correlation time τ changes, (i) in the case of τ＜＜1, the C(t) vs. t curve experiences a changing processfrom the monotonous descending to monotonous rise, and finallyto the appearance of a maximum; (ii) in the case of τ＞＞1, the curve only exhibits periodically surging with descending envelope. When τ＜＜1 and τ does not change, with theincrease of the pump noise intensity P, the curve experiences arepeated changing process, that is, from the monotonous descending tothe appearance of a maximum, then to monotonous rise, and finally to theappearance of a maximum again. With the increase of the quantum noiseintensity Q, the curve experiences a changing process from the monotonousrise to the appearance of a maximum, and finally to the monotonousdescending. The increase of the quantum noise with cross-correlationbetween the real and imaginary parts will lead to the fall ofthe whole curve, but not affect the form of the time evolutionof C(t). |
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| Keywords: | noise single-mode laser intensity correlation function |
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