Photonics Research, 2021, 9 (2): 02000171, Published Online: Jan. 29, 2021   

Controllable two-dimensional Kerr and Raman–Kerr frequency combs in microbottle resonators with selectable dispersion Download: 509次

Author Affiliations
1 School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China
2 Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China
3 e-mail: xyjin007@hfut.edu.cn
4 e-mail: xuxin@hfut.edu.cn
Abstract
We report a broadband two-dimensional (2D) Kerr and Raman–Kerr frequency comb generation in a silica bottle resonator accounting for azimuthal and axial degrees of freedom and pioneer a method that allows for controlled and reversible switching between a four wave mixing (FWM) state and a stimulated Raman scattering state. The repetition rate of the Raman–Kerr comb is not an integer number of the free spectral range, which spans more than 242 nm with hundreds of teeth. We show that, experimentally and numerically, multiple 2D comb regimes can be selectively accessed via dispersion engineering by exciting different orders of axial modes or modifying the curvature of the axial profile, involving cascaded FWM, Raman lasing, and Raman-assisted FWM. The effect of axial curvature on dispersion is associated with the axial mode number in bottle resonators. Our approach enables dispersion and spectral engineering flexibility in any resonator with localized axial modes.

Xueying Jin, Xin Xu, Haoran Gao, Keyi Wang, Haojie Xia, Liandong Yu. Controllable two-dimensional Kerr and Raman–Kerr frequency combs in microbottle resonators with selectable dispersion[J]. Photonics Research, 2021, 9(2): 02000171.

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