光学
切伦科夫辐射
物理
谐振器
旋涡
梁(结构)
栅栏
谐波
涡流
非线性光学
激光器
量子力学
探测器
热力学
作者
Lin Chen,Yan Chen,Xiaoyang Li,Lei Yang,Rui Ni,Gang Zhao,Yong Zhang,Xiao Hu,Shining Zhu
出处
期刊:Chinese Optics Letters
[Shanghai Institute of Optics and Fine Mechanics]
日期:2020-01-01
卷期号:18 (7): 071902-071902
被引量:6
标识
DOI:10.3788/col202018.071902
摘要
In this work, we propose a new scheme to generate frequency-doubled vortex beams from a radially poled LiNbO3 micro-ring resonator based on nonlinear Cherenkov radiation. The near-infrared fundamental wave is resonant in the micro-ring, while the second harmonic is emitted from the resonator along the Cherenkov phase-matching direction. The topological charge of the emitted second-harmonic vortex beam is determined by both the azimuthal order of the whispering galley modes and the number of nonlinear grating elements. The field distribution and the conversion efficiency of the emitted vortex beam are investigated.
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