| 开放V型系统相对位相对LWI增益瞬态演化的影响 |
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| 引用本文： | 梁颖,王军,樊锡君.开放V型系统相对位相对LWI增益瞬态演化的影响[J].计算物理,2012(5):775-780. |
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| 作者姓名： | 梁颖 王军 樊锡君 |
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| 作者单位： | 山东师范大学物理与电子科学学院;山东师范大学附属中学 |
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| 基金项目： | 国家自然科学基金(10875072)资助项目 |
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| 摘 要： | 数值计算具有自发辐射诱导相干性的开放V型三能级原子系统密度矩阵运动方程,分析无反转激光(LWI)增益的瞬态演化.结果表明:无论是否存在非相干抽运,探测场和驱动场间的相对位相(Ф)对增益的瞬态演化都有显著的影响;通过选择的取值可以获得更大的瞬态和稳定增益;不存在非相干抽运时,系统达到瞬态增益最大值及获得增益稳定值所需要的时间更长,演化过程中振荡幅度更大,获得的增益更大;原子退出速率r0(原子注入速率比S)的变化将使增益瞬态演化的具体过程发生改变,在r0(S)的一定取值范围内,瞬态和稳定增益随S(r0)的增大而增大.
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| 关 键 词： | 开放系统 瞬态演化 相对位相 无反转激光 增益 |
Influence of Relative Phase on Transient Evolution of LWI Gain in an Open V-type System |
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| LIANG Ying,Wang Jun,FAN Xijun.Influence of Relative Phase on Transient Evolution of LWI Gain in an Open V-type System[J].Chinese Journal of Computational Physics,2012(5):775-780. |
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| Authors: | LIANG Ying Wang Jun FAN Xijun |
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| Institution: | 1(1.College of Physics and Electronics,Shandong Normal University,Jinan 250014,China; 2.High School Attached to Shandong Normal University,Jinan 250014,China) |
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| Abstract: | With numerical solution of density matrix motion equations of an open V-type three-level atomic system with spontaneously generated coherence,we analyze transient evolution of gain of lasing without inversion(LWI).It is shown that relative phase() between probe and driving fields has a significant effect on transient evolution of gain regardless of incoherent pump;Greater transient and steady gains can be obtained by selecting ;As incoherent pump is absent,longer time is needed to get the greatest transient gain and steady gain.Oscillation amplitude in the evolution process is greater,and gain is also greater;Changing atomic exit rate r0(ratio of atomic injection rates S) leads to detail of gain transient evolution.In certain range of r0(S),transient and steady gains increase with S(r0). |
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| Keywords: | open system transient evolution relative phase lasing without inversion gain |
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