Year
Month
(Peer-Reviewed) Soliton microcombs in optical microresonators with perfect spectral envelopes
Mulong Liu ¹, Ziqi Wei ² ³, Haotong Zhu ¹, Hongwei Wang ⁴, Xiao Yu ⁵, Xilin Han ⁵, Wei Zhao ⁶, Guangwei Hu ⁴, Peng Xie ³ ⁵
¹ School of Science, Northwest A & F University, Yangling 712100, China
中国 杨凌 西北农林科技大学理学院
² School of physics, Peking University, Beijing 100871, China
中国 北京 北京大学物理学院
³ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
中国 北京 中国科学院大学材料科学与光电技术学院
⁴ School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 308232, Singapore
⁵ Qiguang Research and Innovation Center, Aerospace Laser Technology and System Department, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, China
中国 上海 中国科学院上海光学精密机械研究所空天激光技术与系统部启光创新中心
⁶ State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China
中国 西安 中国科学院西安光学精密机械研究所 瞬态光学与光子技术国家重点实验室
Opto-Electronic Advances, 2025-03-12
Abstract

We theoretically and experimentally investigate thermal dynamics involved soliton microcomb generation in silicon oxynitride microresonators. Importantly, auxiliary laser heat balance scheme with flexible thermal manipulation is introduced to circumvent thermal instability and the intra-cavity temperature can be tuned from 60 °C to 41.5 °C via the commercial thermoelectric controller.

As a result, various perfect soliton states with ultra-smooth spectral envelopes are observed on a well-designed and fabricated microresonator with homogeneous sidewall and thickness where spatial modes interaction and distortion are eliminated. The pre-reported spectral abrupt jumps due to mode hybridization are completely avoided and solitons tail oscillation vanishes simultaneously.

This reported ideal coherent comb source without residual temporal and spectral noise will facilitate practical applications such as spectroscopy, ranging and astrocomb calibration.
Soliton microcombs in optical microresonators with perfect spectral envelopes_1
Soliton microcombs in optical microresonators with perfect spectral envelopes_2
Soliton microcombs in optical microresonators with perfect spectral envelopes_3
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