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optical Fiber {1. Conference, OFC 201.

作者： Xue, Lei Yi, Lilin Li, Peixuan Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China

We demonstrate a 50-Gb/s PAM-4 TDM-PON over 25-km SSMF based on DML and APD with 6-GHz 3-dB bandwidth in O-band. Dispersion-supported optical equalization is used to reduce the complexity of FFE and Volterra algorithm... 详细信息

ISBN: (纸本)9781943580385

关键词： Passive optical {1.

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56 Gbps IM/DD PON based on 1.G-class optical devices with 29 dB loss budget enabled by machine learning

56 Gbps IM/DD PON based on 10G-class optical devices with 29...

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optical Fiber {1. Conference, OFC 201.

作者： Li, Peixuan Yi, Lilin Xue, Lei Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China

We demonstrate 56Gbps PAM4 PON transmission over 25km SSMF using 1.G-class DML and APD with 6 GHz 3-dB bandwidth. 29 dB loss budget is achieved by a novel equalization technique based on convolutional neural network. ... 详细信息

ISBN: (纸本)9781943580385

关键词： Budget control

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Carrier Regeneration in Kramers Kronig System Enabled by Injection Locking for optical Interconnection

Carrier Regeneration in Kramers Kronig System Enabled by Inj...

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IEEE Photonics Conference (IPC)

作者： Xiaoling Zhang Longsheng Li Chen Chen Wei Jin Chongfu Zhang Kun Qiu School of Information and Communication Engineering Zhongshan Institute University of Electronic Science and Technology of China Chengdu China School of Electronic and Information University of Electronic Science and Technology of China Zhongshan Institute Zhongshan China State Key lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China School of Microelectronics and Communication Engineering Chongqing University Chongqing China

We experimentally demonstrate a carrier regeneration technique based on injection locking for optical intra-datacenter interconnection. 56-Gb/s optical SSB-PAM-4 signal with -2-dB power ratio of weak pilot tone to sig... 详细信息

ISBN: (数字)9781728158914

ISBN: (纸本)9781728158921

关键词： optical fibers optical receivers optical filters optical transmitters Amplitude modulation optical modulation

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Multi-Agent Genetic Algorithm for Sparse optical Phased Array Optimization

Multi-Agent Genetic Algorithm for Sparse Optical Phased Arra...

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Asia communications and Photonics Conference

作者： Chuxin Liu Weihan Xu Linjie Zhou Liangjun Lu Jianping Chen Shanghai Institute for Advanced Communication and Data Science Shanghai Key Lab of Navigation and Location Services State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering SJTU Shanghai China

We propose a multi-agent Genetic algorithm to suppress the peak sidelobe ratio (PSLR) in the OPA far-field diffraction pattern. The optimized 1.8-channel sparse array achieves beam-steering range of &#1.7;60&#1.6; wit... 详细信息

ISBN: (纸本)9781943580705

关键词： Far field diffraction Free space optics Genetic algorithms optical coherence tomography Phased arrays Ptychography

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Simplified signal processing for high-speed PON

Simplified signal processing for high-speed PON

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Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 201.

作者： Yi, Lilin Xue, Lei Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Institute for Advanced Communication and Data Science Shanghai Jiao Tong University Shanghai200240 China

We have experimentally demonstrated symmetric 425 Gb/s TWDM-PON and 50 Gb/s TDM-PON based on 1.G class devices. Low-cost DMLs are used as transmitter and simple optical signal process is used for bandwidth equalizatio... 详细信息

ISBN: (纸本)9781943580453

关键词： Passive optical {1.

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Comparison of phase change process in Si-GST hybrid integrated waveguide and MMI devices

arXiv

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arXiv 2020年

作者： Zhang, Hanyu Yang, Xing Lu, Liangjun Chen, Jianping Rahman, B.M.A. Zhou, Linjie College of Telecommunications and Information Engineering Nanjing University of Posts and Telecommunications Nanjing210023 China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Institute for Advanced Communication and Data Science Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Department of Electrical and Electronic Engineering City University of London LondonEC 1V0HB United Kingdom

In the past decades, silicon photonic integrated circuits (PICs) have been considered as a promising approach to solve the bandwidth bottleneck in optical {1.s and interconnections. Despite significant advances, large-scale PICs still face a series of technical challenges, such as footprint, power consumption, and routing state storage, resulting from the active tuning methods used to control the optical waves. These challenges can be partially addressed by combining chalcogenide phase change materials (PCMs) such as Ge2Sb2Te5 (GST) with silicon photonics, especially applicable in switching applications due to the nonvolatile nature of the GST. Although GST phase transitions between amorphous and crystalline states actuated by optical and electrical pulses heating have been experimentally demonstrated, there is no direct comparison between them. We carried out simulations and experiments to systematically investigate the difference in the phase change process induced by optical and electrical pulses for two types of Si-GST hybrid waveguides. For the phase transition induced by optical pulses, the device has a clear advantage in terms of power consumption and operation speed. For the phase transition induced by electrical pulses, the device is suitable for large-scale integration because it does not require complex light routing. It helps us better understand the phase change process and push forward the further development of Si-GST hybrid integration platform, bringing in new potential *** Codes 78M50 Copyright © 2020, The Authors. All rights reserved.

关键词： Photonic devices

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Multi-scale GCN-assisted two-stage network for joint segmentation of retinal layers and disc in peripapillary OCT images

arXiv

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arXiv 2021年

作者： Li, Jiaxuan Jin, Peiyao Zhu, Jianfeng Zou, Haidong Xu, Xun Tang, Min Zhou, Minwen Gan, Yu He, Jiangnan Ling, Yuye Su, Yikai John Hopcroft Center for Computer Science Shanghai Jiao Tong University Shanghai200240 China Department of Preventative Ophthalmology Shanghai Eye Disease Prevention and Treatment Center Shanghai Eye Hospital Shanghai200040 China Department of Ophthalmology Shanghai General Hospital Shanghai Jiao Tong University Shanghai200080 China Department of Electrical and Computer Engineering The University of Alabama AL35487 United States State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

An accurate and automated tissue segmentation algorithm for retinal optical coherence tomography (OCT) images is crucial for the diagnosis of glaucoma. However, due to the presence of the optic disc, the anatomical structure of the peripapillary region of the retina is complicated and is challenging for segmentation. To address this issue, we developed a novel graph convolutional network (GCN)-assisted two-stage framework to simultaneously {1.el the nine retinal layers and the optic disc. Specifically, a multi-scale global reasoning module is inserted between the encoder and decoder of a U-shape neural network to exploit anatomical prior knowledge and perform spatial reasoning. We conducted experiments on human peripapillary retinal OCT images. The Dice score of the proposed segmentation network is 0.820 ± 0.001.and the pixel accuracy is 0.830 ± 0.002, both of which outperform those from other state-of-the-art techniques. Copyright © 2021. The Authors. All rights reserved.

关键词： optical tomography

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Silicon photonic devices for optical signal processing in wavelength, polarization and mode domains

Silicon photonic devices for optical signal processing in wa...

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Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 201.

作者： Zhang, Yong He, Yu Zhou, Huanying Xu, Zhenzhen Jiang, Xinhong Guo, Xuhan Qiu, Ciyuan Su, Yikai State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

We review recent progress on silicon photonic devices for optical signal processing, including nanobeam devices for wavelength filtering and switching, directional couplers for polarization/mode processing, and subwav... 详细信息

ISBN: (纸本)9781943580453

关键词： optical signal processing

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SBS-based OEO with high tuning resolution and wide tuning range by selecting different-order phase modulation sideband as pump

SBS-based OEO with high tuning resolution and wide tuning ra...

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optical Fiber {1. Conference, OFC 201.

作者： Shi, Mengyue Yi, Lilin Hu, Weisheng State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Department of Electronic Engineering Shanghai200240 China

Optoelectronic oscillator with tuning resolution of 1.MHz and tuning range up to 40GHz is realized based on stimulated Brillouin scattering. The sideband mode suppression ratio is 50dB and the SSB phase noise is -1.0d... 详细信息

ISBN: (纸本)9781943580385

关键词： Stimulated Brillouin scattering

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Energy Consumption of Hybrid Data Center networks

Energy Consumption of Hybrid Data Center Networks

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International Conference on Network and Service Management

作者： Joel Reginald Dodoo Weiqiang Sun Feng Zhu Weisheng Hu Shanghai Institute for Advanced Communication and Data Science Shanghai Jiao Tong University China SMcGill University Canada State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University China

ISBN: (数字)9783903176249

ISBN: (纸本)9781728153964

Existing data center networks (DCNs) based on only electronic packet or all-{1. switching still pose an exponential increase in power consumption and cost due to the current high demand for digital data and sustainability issues. The recent development of hybrid DCN prototypes is a promising solution offering relatively higher data throughput, low latency, reduction in cost and energy consumption. This paper explores the frontier of hybrid DCN with a special focus on energy consumption and cost. We evaluate the energy consumption per bit and the greenhouse gas (GHG) emission per year of three hybrid switching systems as compared with an {1. point to point (ptp) network, results show that the hybrid switching systems will consume less energy per bit and are likely to emit less GHG annually. We present feasibility analysis on the energy consumption and cost of some hybrid DCN prototypes. Evaluation results show that Helios-like and Hybrid {1. Switching-like prototypes achieve a power usage effectiveness (PUE) value lower than 1.2, an index which represents a very efficient level of energy performance in a data center network.

关键词： Germanium

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