随机激光器中准态腔的阈值与其局域化程度的关系  

Influence of spatial localization on the threshold of quasi-state cavities in random lasers

作　　者：刘劲松[1] 王宏[1] 

机构地区：[1]华中科技大学激光技术国家重点实验室,武汉430074

出　　处：《物理学报》2004年第12期4224-4228,共5页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :60 3 780 0 1);湖北省自然科学基金重点项目(批准号 :2 0 0 1ABA0 0 3 )资助的课题~~

摘　　要：基于光波在有限随机介质中的局域化理论 ,利用有限时域差分法数值求解Maxwell方程组 ,研究了随机介质中的激光现象 ,分析了准态模的放大与其空间局域性的关系 .通过研究二维非增益随机介质中光波的局域化 ,确定了准态模的空间分布和频谱特征 .通过引入增益 ,研究了准态模的放大过程和阈值特性 .结果表明空间局域化强的准态模在增益介质中被优先放大 。Laser phenomena in random media have been studied based on the localized theory for optical waves in finite random media. The relationship between spatial localization and amplification for quasi-state modes has been investigated by use of the finite difference time domain method. The spatial profile and the spectra characteristics of quasi-state modes are determined by analyzing the localized processes of optical light beams in random media without gain. The amplification and threshold of quasi-state modes are analyzed in random media with gain. Results show that the quasi-state mode with a stronger spatial localization has lower threshold and can be amplified preferentially.

关 键 词：随机激光器 准态模 随机介质 光学特性 有限时域差分法 

分 类 号：TN248[电子电信—物理电子学]