Millimetre-Wave Comb Generated by an Optical Microcomb
Loughborough University（拉夫堡大学）；University of Sussex（萨塞克斯大学）
Luke Peters, Antonio Cutrona, Andrew R. Cooper, Luana Olivieri, Fedor Getman, Vittorio Cecconi, Nitish Paul, Debayan Das, Maxwell Rowley, Sai T. Chu, Brent E. L… 展开作者
Luke Peters, Antonio Cutrona, Andrew R. Cooper, Luana Olivieri, Fedor Getman, Vittorio Cecconi, Nitish Paul, Debayan Das, Maxwell Rowley, Sai T. Chu, Brent E. Little, Roberto Morandotti, David J. Moss, Juan S. Totero Gongora, Alessia Pasquazi, Marco Peccianti
Metrological-grade millimetre wave baseband comb sources covering the subterahertz window are a key building block for next-generation wireless communications, precision sensing, and positioning systems. While optical microcombs have set new benchmarks in ultra-low phase noise single-frequency microwave generation, to date, no microcomb source has directly produced a millimetre-wave baseband comb. Here, we present a 50 GHz repetition rate carrier-envelope offset estabilised millimetre-wave baseband comb source covering the sub-terahertz region, generated from an optical microcomb source. Our microresonator-filtered microcomb enables direct, coherent downconversion via photoconductive antennas, even without external amplification. The metrological-grade optical soliton source produces single-cycle, naturally zero carrier-envelope offset millimetrewave baseband combs. It supports time-domain spectroscopy without any need to temporally align the source and detection pulses, as the ultra-high phase coherence allows significant differences between the optical paths of the source and detection pulses, which we tested over 8m, finding no degradation even in freerunning operation. Finally, the multisoliton operation regime provides a simple way of spectrally tailoring the microwave output by selecting different optical soliton states.
Communication-ready high-power soliton microcombs in highly-dispersive Fabry-Perot-microresonators
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University（北京大学物理学院人工微结构和介观物理国家重点实验室及纳米光电前沿科学中心）；Peking University Yangtze Delta Institute of Optoelectronics（北京大学长三角光学光电科技研究院）；Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学极端光学协同创新中心）；Hefei National Laboratory（合肥国家实验室）；State Key Laboratory of Advanced Optical Communications System and Networks, School of Electronics, Peking University（北京大学电子工程学院先进光通信系统与国家网络重点实验室）
Integrated soliton microcombs beyond the turnkey limit
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University（北京大学物理学院前沿纳米光电学中心及人工微结构介观物理国家重点实验室）；Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所北京凝聚态物理国家实验室）；Peking University Yangtze Delta Institute of Optoelectronics（北京大学长三角光学光电研究院）；Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学极端光学协同创新中心）
Photonic timing-engineered solitons for dual-microcomb metrology
Tsinghua University（清华大学）；International Quantum Academy, Shenzhen（深圳量子高等研究院）；Southern University of Science and Technology（南方科技大学）；University of Science and Technology of China（中国科学技术大学）
Program gain and loss for broadband soliton microcombs
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University（北京大学物理学院人工微结构和介观物理国家重点实验室及纳米光电前沿科学中心）；Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences（中国科学院物理研究所北京凝聚态物理国家研究中心）；Peking University Yangtze Delta Institute of Optoelectronics（北京大学长三角光学光电研究院）；Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学极端光学协同创新中心）；Hefei National Laboratory（合肥国家实验室）
Ultralow-power chip-based soliton microcombs for photonic integration
在光学微谐振器中产生的耗散克尔孤子提供了一条途径，以紧凑的频率梳的高重复率，这已经被用于光学频率合成器，超快测距，相干通信和双梳光谱。氮化硅（Si $_3$ N $_4$）微谐振器是一种很有前途的光子集成孤子微梳。迄今为止，由于低质量（$Q$）因素，以及由于需要使用频率捷变激光器来访问孤子状态的热效应，以通常小于100 GHz的电子可检测重复率在Si $_3$ N $_4$微谐振器中形成孤子受到外部功率放大器的要求的阻碍。这些要求使得基于Si $_3$ N $_4$微谐振器的孤子微梳器件与其他有源或无源部件的异质或混合的未来光子集成复杂化。在这里，使用的光子大马士革回流过程中，我们展示了超低功率单孤子形成高Q（$Q_0>15\times10^6$）硅$_3$ N $_4$微谐振器与9.8 mW的输入功率（6.2 mW的波导）的电子检测，99 GHz的重复率的设备。我们表明，孤子可以通过简单的，缓慢的激光压电调谐，在同一个样品中的许多谐振。这些功率水平与当前基于硅光子学的激光器兼容，用于孤子微梳的完全光子集成，重复率适合于超快测距和相干通信等应用。我们的研究结果表明，硅$_3$ N $_4$光波导的技术准备为未来的全芯片孤子微梳器件。
Rhythmic soliton interactions for integrated dual-microcomb spectroscopy
State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University（清华大学精密测试技术与仪器国家重点实验室，精密仪器系）；International Quantum Academy（国际量子学院）；Department of Optics and Optical Engineering, University of Science and Technology of China（中国科学技术大学光学与光学工程系）；Hefei National Laboratory, University of Science and Technology of China（中国科学技术大学合肥国家实验室）
