Near-zero-dispersion soliton and broadband modulational instability Kerr microcombs in anomalous dispersion

Zeyu Xiao; Tieying Li; Minglu Cai; Hongyi Zhang; Yi Huang; Chao Li; Baicheng Yao; Kan Wu; Jianping Chen

doi:10.1038/s41377-023-01076-8

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Near-zero-dispersion soliton and broadband modulational instability Kerr microcombs in anomalous dispersion

Original Articles

- Near-zero-dispersion soliton and broadband modulational instability Kerr microcombs in anomalous dispersion
- Light: Science & Applications Vol. 12, Issue 2, Pages: 220-231(2023)
- Affiliations：
  
  1.State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronic Information and Electrical Engineering, Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
  2.Key Laboratory of Optical Fibre Sensing and Communications (Education Ministry of China), University of Electronic Science and Technology of China, Chengdu, 611731, China
- Author bio：
  
  Baicheng Yao (yaobaicheng@uestc.edu.cn)
  Kan Wu (kanwu@sjtu.edu.cn)
- Funds：
- DOI：10.1038/s41377-023-01076-8
  CLC：
- Published：28 February 2023，
  
  Published Online：1 February 2023，
  
  Received：15 August 2022，
  
  Revised：2 January 2023，
  
  Accepted：9 January 2023
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Xiao Z. Y. et al. Unifying colors by primes. Light: Science & Applications, 12, 207-219 (2023).
DOI：

Xiao Z. Y. et al. Unifying colors by primes. Light: Science & Applications, 12, 207-219 (2023). DOI： 10.1038/s41377-023-01076-8.

摘要

Abstract

The developing advances of microresonator-based Kerr cavity solitons have enabled versatile applications ranging from communication

signal processing to high-precision measurements. Resonator dispersion is the key factor determining the Kerr comb dynamics. Near the zero group-velocity-dispersion (GVD) regime

low-noise and broadband microcomb sources are achievable

which is crucial to the application of the Kerr soliton. When the GVD is almost vanished

higher-order dispersion can significantly affect the Kerr comb dynamics. Although many studies have investigated the Kerr comb dynamics near the zero-dispersion regime in microresonator or fiber ring system

limited by dispersion profiles and dispersion perturbations

the near-zero-dispersion soliton structure pumped in the anomalous dispersion side is still elusive so far. Here

we theoretically and experimentally investigate the microcomb dynamics in fiber-based Fabry-Perot microresonator with ultra-small anomalous GVD. We obtain 2/3-octave-spaning microcombs with ~10 GHz spacing

> 84 THz span

and > 8400 comb lines in the modulational instability (MI) state

without any external nonlinear spectral broadening. Such widely-spanned MI combs are also able to enter the soliton state. Moreover

we report the first observation of anomalous-dispersion based near-zero-dispersion solitons

which exhibits a local repetition rate up to 8.6 THz

an individual pulse duration < 100 fs

a span > 32 THz and > 3200 comb lines. These two distinct comb states have their own advantages. The broadband MI combs possess high conversion efficiency and wide existing range

while the near-zero-dispersion soliton exhibits relatively low phase noise and ultra-high local repetition rate. This work complements the dynamics of Kerr cavity soliton near the zero-dispersion regime

and may stimulate cross-disciplinary inspirations ranging from dispersion-controlled microresonators to broadband coherent comb devices.

关键词

Keywords

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