Flat soliton microcomb source

• Published in: Opto-Electronic Science Vol. 2; no. 12; p. 230024
• Main Authors: Wang, Xinyu, Qiu, Xuke, Liu, Mulong, Liu, Feng, Li, Mengmeng, Xue, Linpei, Chen, Bohan, Zhang, Mingran, Xie, Peng
• Format: Journal Article
• Language: English
• Published: School of Future Technology,University of Chinese Academy of Sciences,Beijing 100049,China%Department of Engineering Science,University of Oxford,Parks Road,Oxford OX13PJ,UK%School of Science,Northwest A&F University,Yangling 712100,China%Department of Physics,City University of Hong Kong,Kowloon,Hong Kong 999077,SAR,China%Department of Engineering Science,University of Oxford,Parks Road,Oxford OX13PJ,UK 01.12.2023; School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore; Editorial Office of Opto-Electronic Journals, Institute of Optics and Electronics, CAS, China
• Subjects: flat spectral profile; soliton microcomb; ultra-flat integrated dispersion; flat spectral profile; soliton microcomb; ultra-flat integrated dispersion
• ISSN: 2097-0382
• DOI: 10.29026/oes.2023.230024

Mode-locked microcombs with flat spectral profiles provide the high signal-to-noise ratio and are in high demand for wavelength division multiplexing(WDM)-based applications,particularly in future high-capacity communication and paral-lel optical computing.Here,we present two solutions to generate local relatively flat spectral profiles.One microcavity with ultra-flat integrated dispersion is pumped to generate one relatively flat single soliton source spanning over 150 nm.Besides,one extraordinary soliton crystal with single vacancy demonstrates the local relatively flat microcomb lines when the inner soliton spacings are slightly irregular.Our work paves a new way for soliton-based applications owing to the rel-atively flat spectral characteristics.