Electro-optic modulators lie at the heart of complex integration and high density electro-optic systems. One of the representative electro-optic modulators is thin film lithium niobate based microring modulator which has demonstrated advantages of compact footprint, low optical loss and high modulation efficiency. However, the linewidth and extinction ratio of ring modulators are fundamentally limited by the ring losses and coupling, respectively. To this end, we propose a novel type of electro-optic modulators with ring-pair structure on thin film lithium niobate platform, which brings substantially improvement of linewidth and extinction ratio. The ring-pair modulator exhibits a larger linewidth up to 22 GHz, 1.74-time larger than that of single ring resonator with same design parameters. Moreover, the experimental results also reveal that the added-up extinction ratio of ring-pair resonator goes beyond 30 dB, much larger than that in an individual ring resonator. These advantages of ring-pair modulator pave a new way for the application of compact ring-based modulators with large working wavelength window and high extinction ratio, to be exploited in quantum optics, programmable nanophotonics and optical sensors, etc.
State Key Laboratory of Precision Spectroscopy, East China Normal University（华东师范大学精密光谱科学国家重点实验室）；The Extreme Optoelectromechanics Laboratory (XXL), School of Physics, East China Normal University（华东师范大学物理学院极端光机电集成实验室）；Hefei National Laboratory（合肥国家实验室）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学极端光学协同创新中心）
State Key Laboratory of Ultra-intense Laser Science and Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences（中国科学院上海光学精密机械研究所超快激光科学与技术国家重点实验室）；Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences（中国科学院大学材料科学与光电技术研究中心）；State Key Laboratory of Precision Spectroscopy, East China Normal University（华东师范大学精密光谱科学与技术国家重点实验室）；The Extreme Optoelectromechanics Laboratory (XXL), School of Physics and Electronic Science, East China Normal University（华东师范大学物理与电子科学学院极端光机电实验室）；Shanghai Research Center for Quantum Sciences（上海市量子科学研究中心）；Hefei National Laboratory（合肥国家实验室）；Collaborative Innovation Center of Extreme Optics, Shanxi University（山西大学极端光学协同创新中心）；Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University（山东师范大学光调控与应用协同创新中心）
On-chip electro-optically tunable narrow linewidth Brillouin microlasers implemented in thin film lithium niobate
East China Normal University（华东师范大学）；South China University of Technology（华南理工大学）；Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences（中国科学院上海光学精密机械研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Johns Hopkins University（约翰斯·霍普金斯大学）；Shanghai Research Center for Quantum Sciences（上海量子科学研究中心）；Hefei National Laboratory（合肥国家实验室）；Shanxi University（山西大学）；Shandong Normal University（山东师范大学）
Voltage-Programmable Photon Statistics Using a High-Extinction Thin-film Lithium Niobate Modulator
Kirchhoff-Institute for Physics, Heidelberg University（海德堡大学基尔霍夫物理研究所）；Physics Institute, University of Münster（明斯特大学物理研究所）；Pixel Photonics GmbH（Pixel Photonics有限公司）
Suspended thin-film lithium niobate modulator for broadband mid-infrared light modulation and frequency comb generation
University of California, Berkeley（加州大学伯克利分校）；Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California（南加州大学明海电气与计算机工程学院）；PHY research lab, Intel lab（英特尔实验室PHY研究组）；Materials Sciences Division, Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室材料科学部）
Low voltage and high-bandwidth thin-film lithium tantalate modulator on a silicon dioxide substrate
Institute of Physics, Swiss Federal Institute of Technology, Lausanne (EPFL)（洛桑联邦理工学院物理研究所）；Institute of Electrical and Micro Engineering (IEM), EPFL（洛桑联邦理工学院电气与微工程研究所）；Institute of Photonics and Quantum Electronics (IPQ), Karlsruhe Institute of Technology (KIT)（卡尔斯鲁厄理工学院光子与量子电子学研究所）
Push-Pull acousto-optic modulator based on non-suspended thin-film lithium niobate on silicon substrate
Elmore Family School of Electrical and Computer Engineering, Purdue University（普渡大学埃尔莫电气与计算机工程学院）；Department of Electrical and Computer Engineering, University of Michigan（密歇根大学电气与计算机工程系）
高效的片上声光调制器作为微波-光转换的关键器件，在微波-光转换中占有特殊的地位。优选采用均匀的薄膜锂酸盐来构建形成声学谐振腔的悬浮配置，以提高装置的调制效率。然而，有限的腔长和复杂的制作工艺限制了调制效率的进一步突破，并对波导制造提出了挑战。在这项工作中，基于非悬浮薄膜锂硅酸盐-硫系玻璃混合马赫-曾德尔干涉仪波导平台，我们提出并演示了一种内置推挽式声光调制器，其半波电压长度积低至0.03 V cm，调制效率可与最先进的悬浮对应物相媲美。基于低功耗的优点，利用我们研制的内置推挽式声光调制器实现了微波调制链路。该声光调制器的优异性能得益于硫属化物薄膜优异的光弹性能和阻抗匹配叉指换能器激发的反对称瑞利声表面波模式的完全双向参与，克服了传统推挽式声光调制器中马赫-曾德尔干涉仪两臂上声表面波振幅差的问题。
High efficiency and compact lithium niobate non-resonant recirculating phase modulator and its applications
School of Physical Science and Technology, Lanzhou University（兰州大学物理科学与技术学院）；Integrated Photonics and Applications Centre (InPAC), School of Engineering, RMIT University（皇家墨尔本理工大学工程学院集成光子学与研究中心）；School of Mathematics and Physics, North China Electric Power University（华北电力大学数理学院）
