Normalized intensity correlation function of single-mode laser system driven by colored cross-correlation noises

2008 ◽  
Vol 6 (4) ◽  
pp. 288-290 ◽  
Author(s):  
王兵 王兵 ◽  
吴秀清 吴秀清 ◽  
Bing Wang Bing Wang ◽  
Xiuqing Wu Xiuqing Wu
Keyword(s):  
Correlation Function ◽  
Cross Correlation ◽  
Laser System ◽  
Single Mode ◽  
Intensity Correlation ◽  
Mode Laser ◽  
Single Mode Laser ◽  
Intensity Correlation Function

EFFECTS OF CORRELATION BETWEEN REAL AND IMAGINARY PARTS OF THE QUADRATIC PUMP NOISE ON THE INTENSITY FLUCTUATION OF A SINGLE-MODE LASER SYSTEM

2009 ◽  
Vol 23 (02) ◽  
pp. 155-161
Author(s):  
G. H. ZHAO ◽  
Y. L. XIANG ◽  
D. C. MEI
Keyword(s):  
Correlation Function ◽  
Relaxation Time ◽  
Intensity Fluctuation ◽  
Laser System ◽  
Single Mode ◽  
Intensity Correlation ◽  
Mode Laser ◽  
The Real ◽  
Single Mode Laser ◽  
Intensity Correlation Function

The effects of the correlations between real and imaginary parts of the quadratic pump noise on the normalized intensity correlation function and the associated relaxation time of a single-mode laser model were investigated. The expressions of the intensity correlation function C(s) and the relaxation time Tc were derived. Based on numerical computations, we found that Tc monotonously increases as the strength λp of correlation between the real and imaginary parts of quadratic pump noise increases and the larger λp value is, the slower C(s) decays. The presence of correlations between the real and imaginary parts of the quadratic pump noise causes the intensity fluctuation to increase.

THE INTENSITY CORRELATION TIME OF A SINGLE-MODE LASER DRIVEN BY BOTH COLORED PUMP NOISE WITH SIGNAL MODULATION AND QUANTUM NOISE WITH CROSS-CORRELATION BETWEEN ITS REAL AND IMAGINARY PARTS

2006 ◽  
Vol 20 (29) ◽  
pp. 1867-1878
Author(s):  
QING-HUA CHENG ◽  
DA-HAI XU ◽  
LI CAO ◽  
DA-JIN WU
Keyword(s):  
Correlation Time ◽  
Cross Correlation ◽  
Quantum Noise ◽  
Laser System ◽  
Single Mode ◽  
Time Correlation ◽  
Statistical Fluctuation ◽  
Intensity Correlation ◽  
Single Mode Laser ◽  
Modulation Signal

Using linear approximation method, we calculate the intensity correlation time of a single-mode laser driven by both colored pump noise with signal modulation and quantum noise with cross-correlation between its real and imaginary parts, and analyze the influence of the signal, noise and its cross-correlation form on the statistical fluctuation of the laser system. We detect that the "color" of pump noise is an important factor that affects the statistical fluctuation of the laser system. When the colored pump noise is short time correlation, within a determinate parameter range, the intensity correlation time can be prolonged, and the statistical fluctuation of the laser system can be restrained by increasing the amplitude of modulation signal. The specific frequency of input signal will result in intensity correlation time to appear maximum, and the statistical fluctuation of the laser system is least here. When the colored pump noise is long time correlation, within a determinate parameter range, the intensity correlation time can be also prolonged by increasing the frequency of modulation signal and decreasing its amplitude, and the statistical fluctuation of the laser system will decrease. In particular, when the intensity of quantum noise increases and the cross-correlation between its real and imaginary parts enhance, the intensity correlation time will prolong, and the statistical fluctuation of the laser system is restrained.

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