We here propose and demonstrate a point-by-point programmable broadband microwave spectrum processor with high-resolution up to tens of MHz. We achieve this by bandwidth-minified mapping a programmable optical spectrum processor, which has much larger bandwidth and lower frequency resolution, to a microwave one, and make sure the mapping is a similarity transformation. As a comparison, the traditional optical-to-microwave mapping based on super-heterodyne is bandwidth-preserved and identical. Here the optical spectrum processor is firstly sliced by a high-quality-factor optical resonator, which has periodic transmission peak with MHz-level bandwidth, and then is mapped to microwave domain by optical-frequency-comb-assisted multi-heterodyne. We demonstrate the high frequency resolution and full function reconfigurability experimentally. In a numerical example, we show that the group delay variation of optical spectrum processor could be greatly enlarged after mapping. The resolution improvement and group delay magnification distinguish our proposal significantly from previous spectrum mapping from optics to microwave.
Intelligent Configuration of Integrated Microwave Photonic Filter Featuring Self-Stabilization and Programmable Response
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology（华中科技大学武汉国家光电研究中心）；School of Optical and Electronic Information, Huazhong University of Science and Technology（华中科技大学光学与电子信息学院）；Optics Valley Laboratory（光谷实验室）；National Information Optoelectronics Innovation Center, China Information and Communication Technologies Group Corporation（中国信息通信科技集团有限公司国家信息光电子创新中心）；National Key Laboratory of Microwave Photonics, Nanjing University of Aeronautics and Astronautics（南京航空航天大学微波光子学国家重点实验室）
Programmable ultra-broadband photonic chaos platform enabled by microwave-chaos-driven electro-optic frequency combs
State Key Laboratory of Optical Field Manipulation Science and Technology, Institute of Optics and Electronics, Chinese Academy of Sciences（中国科学院光电技术研究所光场操控科学与技术重点实验室）；Research Center on Vector Optical Fields, Institute of Optics and Electronics, Chinese Academy of Sciences（中国科学院光电技术研究所矢量光学场研究中心）；Tianfu Xinglong Lake Laboratory（天府兴隆湖实验室）；College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences（中国科学院大学材料科学与光电技术学院）
Pulse-by-pulse programmable synthesis of ultrafast optical waveforms
East China Normal University（华东师范大学）；Chongqing Institute of East China Normal University（华东师范大学重庆研究院）；Polytechnique Montréal（蒙特利尔高等理工学院）；University of New Mexico（新墨西哥大学）
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）
University of Science and Technology of China（中国科学技术大学）；CAS Center For Excellence in Quantum Information and Quantum Physics（中国科学院量子信息与量子物理学前沿卓越创新中心）；Anhui Province Key Laboratory of Quantum Network（安徽省量子网络重点实验室）；Hefei National Laboratory（合肥国家实验室）；Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University（清华大学交叉信息研究院量子信息中心）
