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optical Fiber communication (OFC) Conference

作者： Fan Yang Xiansong Fang Xinyu Chen Yanping Li Fan Zhang State Key Laboratory of Advanced Optical Communication Systems and Networks Frontiers Science Center for Nano-optoelectronics Peking University Beijing China Peng Cheng Laboratory Shenzhen China

We demonstrate ultrahigh-speed optical interconnects with single lane bit rate up to 360Gb/s (120GBaud) PAM-8 signal based on thin film lithium niobate modulator with a 3-dB bandwidth larger than 110GHz.

ISBN: (纸本)9781557524669

关键词： optical fibers optical interconnections optical pulse shaping C-band Lithium niobate Bit rate Bandwidth

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Ultrasensitive Measurement of Angular Rotations via Hermite-Gaussian Pointer

arXiv

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arXiv 2022年

作者： Xia, Binke Huang, Jingzheng Li, Hongjing Liu, Miaomiao Xiao, Tailong Fang, Chen Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks Institute for Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai200240 China

Exploring high sensitivity on the measurement of angular rotations is an outstanding challenge in optics and metrology. In this work, we employ the mn-order Hermite-Gaussian beam in the weak measurement scheme with an angular rotation interaction, where the rotation information is taken by another HG mode state completely after the post-selection. By taking a projective measurement on the final light beam, the precision of angular rotation is improved by a factor of 2mn+m+n. For verification, we _perform an optical experiment where the minimum detectable angular rotation improves √15-fold with HG55 mode over that of HG11 mode, and achieves a sub-µrad scale of the measurement precision. Our theoretical framework and experimental results not only provide a more practical and convenient scheme for ultrasensitive measurement of angular rotations, but also contribute to a wide range of applications in quantum metrology. © 2022, CC BY.

关键词： Rotation

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C-band to Multi-band Network Upgrade by a Multi-objective Evolutionary Algorithm-based Optimization Framework

C-band to Multi-band Network Upgrade by a Multi-objective Ev...

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European Conference on optical communication (ECOC)

作者： Ruoxuan Gao Yihao Zhang Xiaomin Liu Minggang Chen Fangchao Li Lilin Yi Weisheng Hu Qunbi Zhuge Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Tencent Beijing China

We propose a multi-objective evolutionary algorithm-based optimization framework to support the networks upgrading from C-band to multi-band systems by optimizing the amplification module in some sites. Through this f... 详细信息

ISBN: (数字)9781957171159

ISBN: (纸本)9781665475570

关键词： Costs C-band Europe Evolutionary computation optical fiber communication Optimization

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Wavelength-Division-Multiplexed Transmission and Dispersion Compensation Enabled by Soliton Microcombs and Cascaded Microrings

Wavelength-Division-Multiplexed Transmission and Dispersion ...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Yuanbin Liu Hongyi Zhang Jiacheng Liu Liangjun Lu Jiangbing Du Yu Li Zuyuan He Jianping Chen Linjie Zhou Andrew W. Poon Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Shanghai Institute for Advanced Communication and Data Science Shanghai Jiao Tong University Shanghai China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu China Department of Electronic and Computer Engineering Photonic Device Laboratory The Hong Kong University of Science and Technology Clear Water Bay Hong Kong

We demonstrate wavelength-division-multiplexed data transmission and dispersion compensation of 25 Gb/s $\times 9$ on-off-keying signals over a 20-km singlemode fiber using an integrated single-soliton microcomb and... 详细信息

ISBN: (纸本)9798350369311

关键词： Solitons Lasers and electrooptics Wavelength division multiplexing Data communication Quantum cascade lasers Electro-optical waveguides optical fiber dispersion Fiber lasers

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Type of Non-reciprocity in Fiber Sagnac Interferometer induced by Geometric Phases

arXiv

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arXiv 2022年

作者： Zhao, Dongzi Huang, Jing-Zheng Xiao, Tailong Hongjing, L.I. Wu, Xiaoyan Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai200240 China

The non-reciprocity of Sagnac interferometer provides ultra-high sensitivity for parameter estimation and offers a wide range of applications, especially for optical fiber sensing. In this work, we study a new type of non-reciprocity existed in optical fiber Sagnac interferometer where the polarization dependent loss is taken into consideration. In particular, this non-reciprocity is irrelevant to the physical effects that being considered in previous studies, which originates from the geometric phases induced by continuous-weak-measurement. In consequence, it has a unique phenomenon of sudden phase transition, which may open a new way for the future design of high precision optical fiber sensors. © 2022, CC BY.

关键词： Fiber optic sensors

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Neural Network-based Fiber Nonlinearity Mitigation in High-speed Coherent optical Transmission systems

Neural Network-based Fiber Nonlinearity Mitigation in High-s...

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optical Fiber communication (OFC) Conference

作者： Fan Zhang Xiansong Fang Xinyu Chen State Key Laboratory of Advanced Optical Communication Systems and Networks Frontiers Science Center for Nano-optoelectronics Peking University Beijing China Peng Cheng Laboratory Shenzhen China

In this paper, we review the recent progress of neural network-based Kerr nonlinearity mitigation techniques in high-speed coherent optical fiber transmission systems. Current studies in both single-carrier and nonlin... 详细信息

ISBN: (纸本)9781665470124

关键词： optical fibers Adaptive systems Artificial neural networks optical fiber networks Fiber nonlinear optics Frequency division multiplexing High-speed optical techniques

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Erbium-Doped Lithium Niobate Waveguide Amplifier

Erbium-Doped Lithium Niobate Waveguide Amplifier

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Minglu Cai Kan Wu Di Zhu Jiaxuan Long Jianping Chen Department of Electronic Engineering State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Agency for Science Institute of Materials Research and Engineering Technology and Research (A*STAR) Singapore Singapore

ISBN: (纸本)9798350345995

Lithium niobate on insulator (LNOI) has attracted great attention due to its outstanding material properties, such as strong electro-optic effect, large optical nonlinearity, lasing capability, etc. [1]. LNOI has proved to be a powerful platform for various photonic applications, and erbium-doped LNOI (Er: LNOI) with gain property has the potential to build a fully integrated photonic system with active components. Recently, many on-chip waveguide amplifiers and lasers based on Er: LNOI have been reported [2]. To our knowledge, benefiting from optimized waveguide structure, and pumping approaches, the 28.73 dB signal enhancement of the waveguide amplifier we have achieved is the highest one among all reported works on Er: LNOI. Moreover, we have demonstrated the signal amplification at the whole C band.

关键词： Electrooptical effects Laser amplifiers Light sources Lithium niobate Material properties Tunable lasers

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Highly Efficient Ultraviolet Harmonic Generation at a Nonlinear Crystal Interface

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Physical Review Applied 2023年第6期19卷 064009-064009页

作者： Yan Guan Yujia Wu Yuanlin Zheng Haigang Liu Xianfeng Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai 200240 China Shanghai Research Center for Quantum Sciences Shanghai 201315 China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal University Jinan 250358 China

High conversion efficiency is vital for the acquisition of UV light through nonlinear processes. Here, we investigate an alternative method to realize highly efficient second-harmonic generation (SHG) based on the interface of β barium metaborate (βBBO) and magnesium-doped lithium niobate (MgO:LN). Theoretical simulations indicate that the SHG efficiency of our method is significantly higher than other phase-matching conditions. In the experiment, we demonstrate that higher conversion efficiency can be realized compared with only employing a single BBO crystal. Besides, the shortest output wavelength of SHG can reach 205 nm in our method. The method proposed here can open another way for the integrated ultraviolet laser and may promote the development of UV micromachining in the future.

关键词： Crystal structure Integrated optics Nonlinear optical susceptibility Second order nonlinear optical processes Laser systems optical materials & elements optical second-harmonic generation

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Training time minimization for federated edge learning with optimized gradient quantization and bandwidth allocation

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Frontiers of Information Technology & Electronic Engineering 2022年第8期23卷 1247-1263页

作者： Peixi LIU Jiamo JIANG Guangxu ZHU Lei CHENG Wei JIANG Wu LUO Ying DU Zhiqin WANG State Key Laboratory of Advanced Optical Communication Systems and Networks Department of ElectronicsPeking UniversityBeijing 100871China China Academy of Information and Communications Technology Beijing 100191China Shenzhen Research Institute of Big Data Shenzhen 518172China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China Zhejiang Provincial Key Laboratory of Information Processing Communication and NetworkingHangzhou 310027China

Training a machine learning model with federated edge learning(FEEL)is typically time consuming due to the constrained computation power of edge devices and the limited wireless resources in edge *** this study,the training time minimization problem is investigated in a quantized FEEL system,where heterogeneous edge devices send quantized gradients to the edge server via orthogonal *** particular,a stochastic quantization scheme is adopted for compression of uploaded gradients,which can reduce the burden of per-round communication but may come at the cost of increasing the number of communication *** training time is modeled by taking into account the communication time,computation time,and the number of communication *** on the proposed training time model,the intrinsic trade-off between the number of communication rounds and per-round latency is ***,we analyze the convergence behavior of the quantized FEEL in terms of the optimality ***,a joint data-and-model-driven fitting method is proposed to obtain the exact optimality gap,based on which the closed-form expressions for the number of communication rounds and the total training time are *** by the total bandwidth,the training time minimization problem is formulated as a joint quantization level and bandwidth allocation optimization *** this end,an algorithm based on alternating optimization is proposed,which alternatively solves the subproblem of quantization optimization through successive convex approximation and the subproblem of bandwidth allocation by bisection *** different learning tasks and models,the validation of our analysis and the near-optimal performance of the proposed optimization algorithm are demonstrated by the simulation results.

关键词： Federated edge learning Quantization optimization Bandwith allocation Training time minimization

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Compact optical mode and polarization filtering devices based on subwavelength gratings on a lithium niobate on insulator platform 13

Compact optical mode and polarization filtering devices base...

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13th International Conference on Information Optics and Photonics, CIOP 2022

作者： Han, Xu Chen, Li Jiang, Yongheng Frigg, Andreas Xiao, Huifu Nguyen, Thach Giang Boes, Andreas Yang, Jianhong Ren, Guanghui Su, Yikai Mitchell, Arnan Tian, Yonghui Institute of Microelectronics Key Laboratory for Magnetism and Magnetic Materials of MOE School of Physical Science and Technology Lanzhou University Gansu Lanzhou730000 China School of Engineering RMIT University MelbourneVIC3001 Australia Ligentec SA Ecublens1024 Switzerland The State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

ISBN: (纸本)9781510660632

We propose and demonstrate compact optical mode and polarization filtering devices on a lithium niobate on insulator (LNOI) platform. The subwavelength grating-based high-order mode pass filter and TM-pass polarizer are designed and experimentally demonstrated successfully. The measured insertion losses and extinction ratio at 1550 nm are lower than 1.9 dB and larger than 30 dB, respectively, while the device lengths are only about 50 μm. © 2022 SPIE.

关键词： Silicon nitride

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