
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
F Gu, Email: fuxinggu@gmail.com
H Zeng, Email: hpzeng@phy.ecnu.edu.cn
S Zhuang, Email: slzhuang@yahoo.com
Published:2017-12,
Published Online:31 March 2017,
Received:14 December 2016,
Revised:27 March 2017,
Accepted:29 March 2017
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Gu, F. X. et al. Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering. Light: Science & Applications, 6, e17061 (2017).
Gu, F. X. et al. Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering. Light: Science & Applications, 6, e17061 (2017). DOI: 10.1038/lsa.2017.61.
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 side-mode suppression factors > 20 dB
large spectral tunability > 8 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.
bottle microresonatorspolymersingle-mode lasingspatial pump engineeringwhispering-gallery modes
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