| Excitation of localized modes and mechanism of random lasing forming in random media |
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| 作者姓名： | WANG Hong LIU Jinsong WANG Kejia HAN Yanling |
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| 作者单位： | State Key Laboratory of Laser Technology, Huazhong University of Science and Teelmology, Wuhan 430074, China |
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| 基金项目： | Acknowledgements This work was supported by the National Natural Science Foundation of China （Grant No. 60378001）. |
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| 摘 要： | Random lasers are a new type of lasers, whose feed- back mechanism is formed not by reflective feedback of the mirrors but by multiple scattering in a disordered gain medium. Over the past few years, although many detailed experimental and theoretical stu…
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| 关 键 词： | 激光物理学 光学性能 激光作用 随机媒质 |
| 收稿时间： | 2006-01-06 |
| 修稿时间： | 2006-01-062006-02-17 |
Excitation of localized modes and mechanism of random lasing forming in random media |
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| WANG Hong LIU Jinsong WANG Kejia HAN Yanling.Excitation of localized modes and mechanism of random lasing forming in random media[J].Chinese Science Bulletin,2006,51(18):2178-2182. |
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| Authors: | Hong Wang Jinsong Liu Kejia Wang Yanling Han |
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| Institution: | (1) State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Laser phenomena in random media have been studied based on the localized theory for lightwave in random media. The relationship between random lasing modes and localized modes has been investigated by directly solving Maxwell equations numerically via the finite difference time domain method. The spatial distribution and the spectra of localized modes are obtained for both passive and active random media. The results show that random lasing modes directly originate from the localized modes inside the random medium. In the presence of gain, any one of the localized modes can be amplified and can serve as random lasing mode. |
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| Keywords: | laser physics random lasers optical properties of ran- dom media |
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