| Effect of Pump Area on Lasing Modes in Active Random Media |
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| 作者姓名： | 谢应茂 刘正东 |
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| 作者单位： | [1]School of Material Science and Engineering, Nanchang University, Nanchang 330047 [2]Department of Physics and Electronic Information Science, Gannan Teachers Colleg, Ganzhou 341000 [3]Institute of Modern Physics, Nanchang University, Nanchang 330047 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60278016 and 10464002. |
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| 摘 要： |
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| 关 键 词： | 激光发射模式 随机介质 非周期性 激励区域 激光散射 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-05-19 |
Effect of Pump Area on Lasing Modes in Active Random Media |
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| XIE Ying-Mao, LIU Zheng-Dong.Effect of Pump Area on Lasing Modes in Active Random Media[J].Chinese Physics Letters,2005,22(11):2827-2830. |
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| Authors: | XIE Ying-Mao LIU Zheng-Dong |
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| Abstract: | We investigate the effect of pump area on lasing modes in an active random medium. Considering the structure characteristics in a real experimental system, the random medium is divided into two regions, i.e. pump and non-pump areas. The dependence of lasing modes on the pump area is qualitatively explained by means of the model in which the lasing is ascribed to the interaction of the complex localized modes in the active random medium with local aperiodic quasi-structure with appropriate pump light. There exist different pump sizes for lasing with different modes. As the pump size decreases in this random system, the pump threshold of the lasing modes increases. There are different lasing modes in different excitation regions in this random system. This gives us some information about the dependence of lasing modes on pump areas in active random media. |
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