双层结构柱形微腔中回音壁模式激光的干涉调制现象研究  

Study of Interference Modulation Effect of Whispering-Gallery Mode Lasing Emission with a Double Layered Microcavity

作　　者：张晓晓[1] 张远宪[1] 普小云[1] 

机构地区：[1]云南大学物理科学技术学院,云南昆明650091

出　　处：《中国激光》2013年第11期51-56,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(11164033);\云南省应用基础研究基金(2011FA006);云南省高校科技创新团队支持计划

摘　　要：利用充入激光染料的石英毛细管构成了一个双层结构的圆柱形微腔,在s和p偏振光抽运条件下,分别观察到了微腔中的横磁波或横电波回音壁模式激光辐射。实验结果表明,横磁波激光光谱出现了明显的干涉调制现象,调制周期随染料溶液折射率的增加而增大,随毛细管内外半径比的增加而减小;横电波激光光谱则没有出现干涉调制现象。用双层微腔结构中反射波对折射波的干涉调制效应,成功解释了观察到的实验现象。双层结构圆柱形微腔中回音壁模式激光的干涉调制现象,为多模回音壁模式激光的模式选择提供了一定的参考。A double-layered cylindrical microcavity is fabricated by filling Rh6G dye solution into a fused capillary. By pumping with s- and p- polarized laser light respectively, whispering-gallery mode lasing emission with transverse magnetic and transverse electric polarization is observed. The interference modulation effect in the whispering- gallery-mode lasing spectra is found when pumped by s- polarized light. And the modulation period increases with the refractive index of dye solution, but decreases with the ratio of the external to internal diameter of a capillary. By applying the interference modulation theory on the reflective and refractive waves in the double-layered cylindrical microcavity, the observed phenomenon can be explained successfully. The interference modulation effect provides a certain reference for mode selection in a multimode whispering-gallery-mode laser.

关 键 词：物理光学 回音壁模式 横磁场模式 横电场模式 干涉调制现象 

分 类 号：O433.2[机械工程—光学工程] TN248.33[理学—光学]