| 激光场中两维色噪声的近似计算 |
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| 引用本文： | 何英,凌寅生,朱士群.激光场中两维色噪声的近似计算[J].光学学报,2002,22(9):025-1031. |
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| 作者姓名： | 何英 凌寅生 朱士群 |
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| 作者单位： | 苏州大学理学院物理系,苏州,215006 |
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| 基金项目： | 国家自然科学基金 (198740 46 )资助课题 |
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| 摘 要： | 从色散型介质中三次激光模型出发，通过泛函导数，应用小于τ近拟计算两维色噪声，得到激光场定态强度分布，研究了定态强度分布的极值点随抽运参量和强度噪声相关时间的变化情况。应用平移1／N展开方法，得到激光场瞬态解，即本征值随抽运参量的变化情况。研究结果表明，抽运参量和噪声相关时间是激光系统出现一级相变类比的关键因素，相位噪声相关时间对强度谱分布中的线宽影响较大。
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| 关 键 词： | 激光场 两维色噪声 近似计算 泛函导数 定态强度分布 一级相变类比 瞬态解 本征值 |
| 收稿时间： | 2001/8/13 |
Approximate Calculation of Two-Dimensional Colored Noise in a Laser Field |
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| He Ying,Ling Yinsheng,Zhu Shiqun.Approximate Calculation of Two-Dimensional Colored Noise in a Laser Field[J].Acta Optica Sinica,2002,22(9):025-1031. |
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| Authors: | He Ying Ling Yinsheng Zhu Shiqun |
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| Abstract: | Functional derivation is employed to analyze the two-dimensional colored noise in the third-order laser model. The stationary intensity distribution is derived. The variation of the most probable intensity with pump parameter and noise intensity correlation time is investigated. With the shifted 1/N expansion, the instantaneous solution of the laser model, i.e., the change of eigenvalues with the pump parameter, is obtained. It is shown that the pump parameter and intensity noise correlation time are the major factors of the first-order-like transition. Angular noise correlation time has great influence on the linewidth in the intensity spectrum. |
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| Keywords: | functional derivation steady-state intensity distribution first-order-like phase transition instantaneous solution eigenvalue |
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