Analyses of Valid Range for the Linear Approximation in a Single-Mode Laser |
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Authors: | CHENG Qing-Hua CAO Li WANG Jun WU Da-Jin |
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Affiliation: | State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China; Department of Physics, Jingzhou Normal University, Jingzhou 434100, China State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China;CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China;CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China |
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Abstract: | Using the linear approximation method, we calculated the steady-state mean normalized intensity fluctu-ation for a loss-noise model of a single-mode laser driven by a pump noise and a quantum noise, whose real part andimaginary part are cross-correlated. We analyzed the valid range for thelinear approximation method by studying theinfluences on the steady-state mean normalized intensity fluctuation by the cross-correlation coefficient, the intensities ofthe quantum and pump noise, the net gain, and the amplitude and frequency of the input signal, and we found that thevalid range becomes wider when the cross-correlation between the real and imaginary part of quantum noise is weaker,the noise intensities of quantum and pump are weaker, the laser system is far from the threshold and the signal hassmaller amplitude and higher frequency. |
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Keywords: | single-mode laser steady-state mean normalized intensity fluctuation linear approximation method |
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