Directly accessing octave-spanning dissipative Kerr soliton frequency combs in an AlN microresonator

作     者：HAIZHONG WENG JIA LIU ADNAN ALI AFRIDI JING LI JIANGNAN DAI XIANG MA YI ZHANG QIAOYIN LU JOHN F.DONEGAN WEIHUA GUO 

作者机构：School of PhysicsCRANN and AMBERTrinity College DublinDublin 2Ireland Wuhan National Laboratory for Optoelectronicsand School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2021年第9卷第7期

页      面：1351-1357页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Science Foundation Ireland (17/NSFC/4918) National Natural Science Foundation of China(61861136001) 

主　　题：soliton spanning dissipative 

摘      要：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 or83 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.