Excitation of localized modes and mechanism of random lasing forming in random media  

作　　者：WANG Hong LIU Jinsong WANG Kejia HAN Yanling 

机构地区：[1]State Key Laboratory of Laser Technology, Huazhong University of Science and Teelmology, Wuhan 430074, China

出　　处：《Chinese Science Bulletin》2006年第18期2178-2182,共5页

基　　金：the National Natural Science Foundation of China （Grant No. 60378001）.

摘　　要：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.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.

关 键 词：激光物理学 光学性能 激光作用 随机媒质 

分 类 号：TN241[电子电信—物理电子学]