| 随机介质中产生随机激光振荡特性的半经典理论分析方法 |
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| 引用本文： | 史林兴,李相银.随机介质中产生随机激光振荡特性的半经典理论分析方法[J].江西科学,2005,23(4):338-342. |
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| 作者姓名： | 史林兴 李相银 |
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| 作者单位： | 南京理工大学理学院,江苏,南京,210094 |
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| 基金项目： | 博士点基金（项目编号J20020220）资助项目. |
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| 摘 要： | 建立了随机激光的半经典理论模型，得到适合随机激光的Maxwell-Bloch方程。采用时域有限差分法（FDTD）直接计算Maxwell-Bloch方程，研究了随机系统中场的类型和随机激光局域模式，同时发现随机系统中存在出现激发峰的临界泵浦速率Wp^c，随着泵浦强度的增强模式数增加，最终激发模式数达到饱和。
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| 关 键 词： | 随机激光 半经典理论 Maxwell-Bloch方程 FDTD |
| 文章编号： | 1001-3679(2005)04-0338-05 |
| 收稿时间： | 2005-04-23 |
| 修稿时间： | 2005-05-28 |
The Method of Semi -classical Theory for Resonance Characteristic of Random Laser in Random Media |
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| SHI Lin-xing,LI Xiang-yin.The Method of Semi -classical Theory for Resonance Characteristic of Random Laser in Random Media[J].Jiangxi Science,2005,23(4):338-342. |
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| Authors: | SHI Lin-xing LI Xiang-yin |
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| Abstract: | A model of random laser with semi-classical theory is presented.It couples Maxwell's equations with density matrix of excited atom in a disordered system.So Maxwell-Bloch equations for random laser are obtained.A finite-difference time-domain method is used to solve Maxwell-Bloch equations directly.We studied the pattern of field and localized modes of random laser.A critical pumping rate W~c_p exists for the appearance of the lasing peaks in random system.The number of lasing modes increases with the pumping rate and it is saturated finally. |
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| Keywords: | Random laser Semi - classical theory Maxwell - Bloch equations FDTD |
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