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arXiv 2024年

作者： Wang, Long Hu, Liang Jiao, Wenhai Shang, Yaxin Chen, Jianping Wu, Guiling State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai China Shanghai Key Laboratory of Navigation and Location-Based Services Shanghai China Beijing Institute of Tracking and Telecommunication Technology Beijing China

The high demand for 3D imaging in intelligent robotics is motivating the advances of coherent LiDARs towards high performances with low complexity/cost. However, the current coherent LiDARs suffer from the tight coupling between the high ranging-imaging performance and the high complexity/cost. Herein, we propose a narrowband parallel coherent LiDAR with frequency-interleaving architecture. The LiDAR architecture utilizes narrowband signals for ranging, and interleaves multi-channel sparse and narrowband signals in frequency domain at the receiving end to significantly reduce the required bandwidth and the number of detection branches, facilitating massive parallelization with low system complexity/cost. In experiments, a ranging precision of 0.49 mm that approaches the shot noise limit, and a power sensitivity of -95 dBm (~9 photons) are achieved. Parallel 3D imaging with an equivalent imaging rate of 10 Mpixel/s and a 2 cm ranging precision is also demonstrated using only two 150 MHz receiving branches. With these desirable properties, this new LiDAR opens an avenue for the LiDAR ecosystem. © 2024, CC BY.

关键词： Shot noise

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Nonlinear thermal emission and visible thermometry

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advanced Photonics 2022年第4期4卷 14-20页

作者： Zhihao Zhou Wei Liu Hengzhe Yan Xianfeng Chen Wenjie Wan Shanghai Jiao Tong University University of Michigan–Shanghai Jiao Tong University Joint InstituteState Key Laboratory of Advanced Optical Communication Systems and NetworksShanghaiChina Shanghai Jiao Tong University Department of Physics and AstronomyShanghaiChina

The control of thermal emission is of great importance for emerging applications in energy conversion and thermometric ***,thermal emission at ambient temperature is limited to the midto far-infrared,according to the linear theory of Planck’s *** experimentally demonstrate a broadband nonlinear thermal emission in the visible-NIR spectrum within a quadradic nonlinear medium,which emits visible thermal radiation through a pump-driven nonlinear upconversion from its mid-IR components even at room temperature,unlike its linear counterpart which requires ultrahigh *** broadband emission is enabled by the crucial random quasi-phase-matching condition in our nonlinear nanocrystal ***,nonlinear thermal emission also permits visible thermometry using traditional optical cameras instead of thermal *** scheme paves the way to understand thermal radiation dynamics with nonlinearity in many fields,such as nonlinear heat transfer and nonlinear thermodynamics.

关键词： thermal radiation nonlinear optics mid-infrared up-conversion sum-frequency generation nanocrystal

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Microwave Signal Generation by Heterodyning Dual Lasers Injection-Locked to a Single Microring Resonator

Microwave Signal Generation by Heterodyning Dual Lasers Inje...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Siyu E Yuyao Guo Xinhang Li Yihao Fan Minhui Jin Yu Li Liangjun Lu Jianping Chen Linjie Zhou Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Shanghai Jiao Tong University Shanghai China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu China

We demonstrate the co-injection locking of two lasers to a high-Q MRR, achieving a linewidth of ~10 Hz. Through heterodyne synthesis, the resulting microwave signal exhibits a drift of only 898 kHz over 10 hours.

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Microwave measurement Frequency synthesizers Laser noise Masers Resonant frequency Microwave communication Laser stability Thermal noise Microwave photonics Thermal stability

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Self-Injection-Locking FMCW Laser Source on the Lithium Niobate Platform

Self-Injection-Locking FMCW Laser Source on the Lithium Niob...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xinhang Li Minglu Cai Ruiyang Xu Yihao Fan Chuxin Liu Yuyao Guo Siyu E Minhui Jin Kan Wu Yu Li Liangjun Lu Jianping Chen Linjie Zhou Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Shanghai Jiao Tong University Shanghai China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu China

We demonstrate a hybrid-integrated linear-chirp frequency-modulated continuous wave laser based on self-injection locking to a high-Q lithium niobate multimode microring resonator with a 1 kHz linewidth and 1 MHz modu... 详细信息

ISBN: (纸本)9798350369311

关键词： Frequency modulation Chirp modulation Lithium niobate Resonant frequency Lasers and electrooptics Electro-optic modulators

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Reducing the linewidth of hybrid integrated III-V/silicon laser by utilizing high-Q multimode-waveguide-based silicon ring resonator

Reducing the linewidth of hybrid integrated III-V/silicon la...

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optical Fiber communication (OFC) Conference

作者： Xinhang Li Yuyao Guo E Siyu Yihao Fan Minhui Jin Weihan Xu Liangjun Lu Yu Li Jianping Chen Linjie Zhou Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Shanghai Jiao Tong University Shanghai China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu China

We demonstrate a hybrid integrated self-injection locking laser (SIL) with an intrinsic linewidth of 1.25 kHz and an external cavity laser (ECL) of 5.3 kHz by leveraging a high-Q multimode-waveguide-based silicon micr... 详细信息

ISBN: (纸本)9798350377583

关键词： optical fibers optical fiber sensors Laser radar Silicon optical fiber communication optical ring resonators Laser applications

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A Faraday Laser Based on Corner-Cube Retroreflector

A Faraday Laser Based on Corner-Cube Retroreflector

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Conference on Lasers and Electro-Optics (CLEO)

作者： Zhiyang Wang Zijie Liu Hangbo Shi Xiaomin Qin Xiaolei Guan Tiantian Shi Jingbiao Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics and Center for Quantum Information Technology Peking University Beijing China School of Integrated Circuits Peking University Beijing China National Key Laboratory of Advanced Micro and Nano Manufacture Technology Beijing China Hefei National Laboratory Hefei China

We present a single-mode Faraday laser based on the corner-cube retroreflector, whose wavelength can correspond to the atomic transition line. The linewidth can be narrowed below 10 kHz, and the maximum wavelength cha... 详细信息

ISBN: (纸本)9798350369311

关键词： Atomic measurements Atom lasers Semiconductor lasers Magnetometers Atomic beams Wavelength measurement Measurement by laser beam Lasers and electrooptics Laser transitions Retroreflectors

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Terabit Ultra-high-speed NFDM Transmission over G.654E Fiber with 103Gbaud Probabilistic Shaped 64QAM Signals

Terabit Ultra-high-speed NFDM Transmission over G.654E Fiber...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xinyu Chen Xiansong Fang Xiang Cai Lingjun Zhou Chao Li Zhixue He Fan Zhang State Key Laboratory of Advanced Optical Communication System and Networks Frontiers Science Center for Nano-Optoelectronics School of Electronics Peking University Beijing China School of Electronic and Computer Engineering Peking University Shenzhen China Peng Cheng Laboratory Shenzhen China

We experimentally demonstrate a record ultra-high-speed 1.004 Tb/s dual-polarization NFDM transmission system over 300 km G.654E fiber with probabilistic shaped 64QAM signals, achieving a spectral efficiency at 7.65 b... 详细信息

ISBN: (纸本)9781957171258

关键词： Frequency division multiplexing optical amplifiers optical signals Quadrature amplitude modulation Signal processing Signal transmission

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Chirality discerning and monitoring in a metal cladding optofluidic chip

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Chinese Optics Letters 2024年第8期22卷 52-57页

作者： Qiheng Wei Xueqian Wang Hongrui Shan Yi Lai He Li Hailang Dai Xianfeng Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Metal Matrix Composites Shanghai Key Laboratory for Molecular Engineering of Chiral DrugsSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Department of Head and Neck Surgery and Department of Traditional Chinese Medicine Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

The metabolic process of chiral drugs plays a significant role in clinics and in research on ***,we experimentally demonstrate by all-optical means that the chiral molecules can be quickly discriminated and monitored with the ultrahighorder modes excited in a metal cladding optofluidic chip,achieving over 5 times sensitivity with a low-dosage *** show that the varying concentration of the chiral drugs can be monitored both in cell and animal experiments,presenting a significant difference between chiral enantiomers at the optimal function time and the effect of the *** our knowledge,this approach provides a new way to achieve important chiral discrimination for the pharmacokinetics and the pharmacodynamics and may present opportunities in indicating the health status of humans.

关键词： chiral detection ultrahigh-order guided modes metal cladding optofluidic chip high sensitivity circularly polarized light

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Controllable Asymmetric Attack Against Practical Round-Trip Fiber Time Synchronization system

Controllable Asymmetric Attack Against Practical Round-Trip ...

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IEEE International Frequency Control Symposium

作者： Xuesong Xu Yiming Bian Jinlong Hu Jiayi Dou Yang Li Bingjie Xu Yichen Zhang Song Yu Hong Guo School of Electronic Engineering Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China Science and Technology on Communication Security Laboratory Institute of Southwestern Communication Chengdu China School of Electronics and Center for Quantum Information Technology State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China

Using optical fiber links to transmit time information is widely regarded as an accurate and secure time synchronization scheme. However, the accuracy of the round-trip time synchronization system can be manipulated arbitrarily by attack schemes. In this paper, a controllable asymmetric attack scheme against round-trip time synchronization system is proposed and experimentally demonstrated. By adjusting the asymmetry of the link, the time synchronization accuracy can be controlled down from 23 ps to 0.91 ns, 2.13 ns and 5.20 ns. Our work reveals system vulnerability caused by asymmetry, and points out that current systems can be attacked unwittingly by adversaries.

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A Standalone Soliton Microcomb Prototype

A Standalone Soliton Microcomb Prototype

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Chaoxiang Xi Chenhua Hu Yang Shen Lefeng Zhou Hui Wang Guangqiang He State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai China

We built a standalone prototype for generating soliton microcombs. Our prototype supports both manual and automatic soliton generation methods, laying a good foundation for the commercial application of microcombs whi...

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