Asymmetric x ⁽²⁾-translated optical frequency combs assisted by avoided mode crossing in concentric ring resonators

Wu, Pengzhuo1; Tang, Xingyu1; Yang, Yatao1; Wang, Yifan1; Yan, Yongxian1; Pan, Ziyu1; Zhang, Xucheng2,3; You, Mingjian1; Liu, Zhenyu1; Bao, Changjing4; Ji, Xingchen2,3; Li, Yi1; Zhao, Qiancheng1,3

2024-09-09

10.1364/OE.531644

OPTICS EXPRESS   影响因子和分区

1094-4087

chi((2))-translated microcomb generation in microresonators that possess both chi((2)) and chi((3)) nonlinear responses opens the door for ultra-broadband integrated comb sources. The interplay between the second- and third-order nonlinearities within a fixed coupling coefficient fertilizes complicated cavity dynamics which is of paramount scientific and technological potential. However, this coupling coefficient can be drastically wavelength-dependent, which is lack of consideration in previous studies. Here, we extend the range of coupling strengths to a full description and propose a new approach to delineate the spectral response of the interactions between the chi((2)) and chi((3)) nonlinearities. Critically, the underpinned physics is enabled by avoided mode crossing (AMX) in concentric double-ring microresonators. We demonstrate that the evolution of the anti-symmetric mode at fundamental wavelengths disrupts spectral symmetry, leading to asymmetric chi((2))-translated optical frequency combs at second-harmonic wavelengths. Simultaneous generation of skewed two-color optical frequency combs is numerically realized in an exemplary gallium phosphide-on-insulator platform with a coupling constant from 133.3 m(-1)W(-1/2) to 7.4 m(-1)W(-1/2), showing reasonable agreement with our theoretical model. Our findings provide a novel approach to shaping the optical frequency comb, which may facilitate potential applications in self-referencing and frequency metrology with desired comb spectral shapes.

SCI

英语

第一 ; 通讯

Basic and Applied Basic Research Foundation of Guangdong Province["2021B1515120074","2023A1515012141"] ; State Key Laboratory of Advanced Optical Communication Systems and Networks[2024GZKF003] ; National Natural Science Foundation of China[62205137] ; Guangdong Provincial Quantum Science Strategic Initiative[GDZX2304009] ; Wuhan National Laboratory for Optoelectronics[2021WNLOKF001] ; Shenzhen NSQKJJ[K23799109]

Optics

Optics

WOS:001318757600008

Optica Publishing Group

Web of Science

1.Southern Univ Sci & Technol, MOE Engn Res Ctr Integrated Circuits Next Generat, Sch Microelect, Shenzhen 518000, Guangdong, Peoples R China
2.Shanghai Jiao Tong Univ, John Hopcroft Ctr Comp Sci, Sch Elect Informat & Elect Engn, Shanghai 200240, Peoples R China
3.Shanghai Jiao Tong Univ, Dept Elect Engn, State Key Lab Adv Opt Commun Syst & Networks, Shanghai 200240, Peoples R China
4.Nokia Electr Ltd, New York, NY 11016 USA

Wu, Pengzhuo,Tang, Xingyu,Yang, Yatao,et al. Asymmetric x ⁽²⁾-translated optical frequency combs assisted by avoided mode crossing in concentric ring resonators[J]. OPTICS EXPRESS,2024,32(19).

Wu, Pengzhuo.,Tang, Xingyu.,Yang, Yatao.,Wang, Yifan.,Yan, Yongxian.,...&Zhao, Qiancheng.(2024).Asymmetric x ⁽²⁾-translated optical frequency combs assisted by avoided mode crossing in concentric ring resonators.OPTICS EXPRESS,32(19).

Wu, Pengzhuo,et al."Asymmetric x ⁽²⁾-translated optical frequency combs assisted by avoided mode crossing in concentric ring resonators".OPTICS EXPRESS 32.19(2024).