Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering  

作　　者：Fuxing Gu Fuming Xie Xing Lin Shuangyi Linghu Wei Fang Heping Zeng Limin Tong Songlin Zhuang 

机构地区：[1]Shanghai Key Laboratory of Modern Optical Systems,Engineering Research Center of Optical Instrument and System(Ministry of Education),University of Shanghai for Science and Technology,Shanghai 200093,China [2]State Key Laboratory of Modern Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China [3]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200062,China

出　　处：《Light(Science & Applications)》2017年第1期490-496,共7页光（科学与应用)（英文版）

基　　金：supported by the National Natural Science Foundation of China(11674230);973 Program(2015CB352001);National Natural Science Foundation of China(11434005).

摘　　要：Single-mode lasing in whispering-gallery mode(WGM)microresonators is challenging to achieve.In bottle microresonators,the highly non-degenerated WGMs are spatially well-separated along the long-axis direction and provide mode-selection capability.In this work,by engineering the pump intensity to modify the spatial gain profiles of bottle microresonators,we demonstrate a simple and general approach to realizing single-mode WGM lasing in polymer bottle microresonators.The pump intensity is engineered into an interference distribution on the bottle microresonator surface.By tuning the spacing between axial positions of the interference pump patterns,the mode intensity profiles of single-bottle WGMs can be spatially overlapped with the interference stripes,intrinsically enabling single-mode lasing and selection.Attractive advantages of the system,including high sidemode suppression factors 420 dB,large spectral tunability 48 nm,low-lasing threshold and reversible control,are presented.Our demonstrated approach may have a variety of promising applications,ranging from tunable single-mode lasing and sensing to nonlinear optics.

关 键 词：bottle microresonators POLYMER single-mode lasing spatial pump engineering whispering-gallery modes 

分 类 号：TN2[电子电信—物理电子学]