Directly accessing octave-spanning dissipative Kerr soliton frequency combs in an AlN microresonator
Citation:
Haizhong Weng, Jia Liu, Adnan Ali Afridi, Jing Li, Jiangnan Dai, Xiang Ma, Yi Zhang, Qiaoyin Lu, John F. Donegan, and Weihua Guo, "Directly accessing octave-spanning dissipative Kerr soliton frequency combs in an AlN microresonator," Photonics Research, 2021, 9, 1351-1357Download Item:
Abstract:
Self-referenced dissipative Kerr solitons (DKSs) based on optical microresonators offer prominent characteristics allowing for various applications from precision measurement to astronomical spectrometer calibration. To date, direct octave-spanning DKS generation has been achieved only in ultrahigh-Q silicon nitride microresonators under optimized laser tuning speed or bi-directional tuning. Here we propose a simple method to easily access the octave-spanning DKS in an aluminum nitride (AlN) microresonator. In the design, two modes that belong to different families but with the same polarization are nearly degenerate and act as a pump and an auxiliary resonance, respectively. The presence of the auxiliary resonance can balance the thermal dragging effect, crucially simplifying the DKS generation with a single pump and leading to an enhanced soliton access window. We experimentally demonstrate the long-lived DKS operation with a record single-soliton step (10.4 GHz or 83 pm) and an octave-spanning bandwidth (1100–2300 nm) through adiabatic pump tuning. Our scheme also allows for direct creation of the DKS state with high probability and without elaborate wavelength or power schemes being required to stabilize the soliton behavior.
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Grant Number
Science Foundation Ireland
17/NSFC/4918
Author's Homepage:
http://people.tcd.ie/jdonegan
Author: Donegan, John
Type of material:
Journal ArticleCollections
Series/Report no:
Photonics Research;9;
7;
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Full text availableKeywords:
Kerr solitons (DKSs), optical microresonators, ultrahigh-Q silicon nitride microresonatorsDOI:
http://dx.doi.org/10.1364/PRJ.427567Metadata
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