中文版 | English
Title

Dispersion-flattened concentric structure for microcomb bandwidth broadening in GaP-OI resonators

Author
Publication Years
2023-03-01
DOI
Source Title
ISSN
0740-3224
EISSN
1520-8540
Volume40Issue:3Pages:673-681
Abstract

We propose and theoretically investigate the coupled concentric ring resonators on a thickness-constrained GaP on insulator (GaP-OI) integrated photonic platform. Achieving anomalous dispersion is fulfilled by mode hybridization in the coupled structure on a 200 nm thick GaP-OI resonator which originally only exhibits normal dispersion for the fundamental mode. The anomalous dispersion profile for the anti-symmetric mode is flattened and broadened in favor of Kerr frequency comb generation by optimizing the waveguide width and the coupling gap size synergistically. We show the flexibility of this design methodology by simultaneously flattening the dispersion profile while anchoring the dispersion peak location at 1550 nm. The optimized design has a flat anomalous dispersion span of 460 nm with a small peak of 160 ps/km/nm, 1.69 times lower than a traditional rectangular waveguide. The engineered dispersion profile enables a broadband Kerr frequency comb generation that has a 3 dB bandwidth of 67 nm and a 20 dB bandwidth of over 250 nm at both 1550 and 1650 nm pump wavelengths. The proposed design proves useful to achieve broad and flat anomalous dispersion on thickness-constrained materials, paving the way towards low-loss GaP-OI frequency comb resonators.

URL[Source Record]
Indexed By
Language
English
SUSTech Authorship
First
Funding Project
Basic and Applied Basic Research Foundation of Guangdong Province["2021B1515120074","2023A1515012141"] ; Open Project Program of Wuhan National Laboratory for Optoelectronics[2021WNLOKF001] ; National Natural Science Foundation of China[62205137]
WOS Research Area
Optics
WOS Subject
Optics
WOS Accession No
WOS:000955809900007
Publisher
ESI Research Field
PHYSICS
Data Source
人工提交
PDF urlhttps://opg.optica.org/josab/abstract.cfm?uri=josab-40-3-673
Publication Status
正式出版
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/503982
DepartmentSUSTech Institute of Microelectronics
Affiliation
School of Microelectronics, MOE Engineering Research Center of Integrated Circuits for Next Generation Communications, Southern University of Science and Technology, Shenzhen, Guangdong, 518000, China
First Author AffilicationSUSTech Institute of Microelectronics
First Author's First AffilicationSUSTech Institute of Microelectronics
Recommended Citation
GB/T 7714
Zhaoting Geng,Houling Ji,Zhuoyu Yu,et al. Dispersion-flattened concentric structure for microcomb bandwidth broadening in GaP-OI resonators[J]. Journal of Optical Society of America B,2023,40(3):673-681.
APA
Zhaoting Geng.,Houling Ji.,Zhuoyu Yu.,Weiren Cheng.,Pengzhuo Wu.,...&Qiancheng Zhao.(2023).Dispersion-flattened concentric structure for microcomb bandwidth broadening in GaP-OI resonators.Journal of Optical Society of America B,40(3),673-681.
MLA
Zhaoting Geng,et al."Dispersion-flattened concentric structure for microcomb bandwidth broadening in GaP-OI resonators".Journal of Optical Society of America B 40.3(2023):673-681.
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