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Wavelength-Selective 2 × 2 optical Switch Based on a Ge2Sb2 Te5-Assisted Microring for the 2-μm Wavelength Band

Wavelength-Selective 2 × 2 Optical Switch Based on a Ge2Sb2...

2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Zhu, Weixun Yang, Xing Li, Huan Lu, Liangjun Zhou, Linjie Dai, Daoxin Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Department of Electronic Engineering Shanghai200240 China College of Optical Science and Engineering International Research Center for Zhejiang University State Key Laboratory for Modern Optical Instrumentation Center for Optical & Electromagnetic Research Zijingang Campus Hangzhou310058 China Ningbo Research Institute Zhejiang University Ningbo315100 China

We propose and demonstrate a wavelength-selective 2 ×2 silicon photonic switch using a Ge2Sb2Tes-assisted microring-resonator for the 2-μm wavelength-band, showing an extinction ratio of 20 dB and a low excess l... 详细信息

ISBN: (纸本)9798350312614

关键词： Ge2Sb2Te5 (GST) microring-resonator (MRR) optical switch silicon photonics

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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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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Liu, Yuanbin Zhang, Hongyi Liu, Jiacheng Lu, Liangjun Du, Jiangbing Li, Yu He, Zuyuan Chen, Jianping Zhou, Linjie Poon, Andrew W. 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 Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China Photonic Device Laboratory Department of Electronic and Computer Engineering 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 × 9 on-off-keying signals over a 20-km singlemode fiber using an integrated single-soliton microcomb and a cascaded microring resonator-based reconfigurable dispersion compensator. © Optica Publishing Group 2024

关键词： Dispersion compensation

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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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2024 Conference on Lasers and Electro-Optics, CLEO 2024

ISBN: (纸本)9781957171395

关键词： optical fibers

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Linewidth Compression of a Widely Tunable Hybrid Laser Through High-Q Resonance Feedback

Linewidth Compression of a Widely Tunable Hybrid Laser Throu...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Siyu, E. Li, Xinhang Guo, Yuyao Fan, Yihao Jin, Minhui Li, Yu Stroganov, Anton Lu, Liangjun Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China LIGENTEC SA Bâtiment L EPFL Innovation Park Ecublens1024 Switzerland

We present a III-V/Si3N4 widely tunable hybrid laser with an intrinsic linewidth of 50 Hz by using a resonance feedback from a high-Q ring resonator. The linewidth is reduced by approximately 24 fold. CLEO 2024 ©... 详细信息

ISBN: (纸本)9781957171395

关键词： Linewidth

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Micro-Bending Influence on Mode-Dependent Loss

Micro-Bending Influence on Mode-Dependent Loss

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International Conference on advanced Infocomm Technology (ICAIT)

作者： Junpeng Liang Gang Qiao Jinlong Wei Juhao Li Yu Yang Zhaopeng Xu Lulu Liu Shangcheng Wang Qi Wu Weisheng Hu Dept. of Circuits and System Peng Cheng Laboratory Shenzhen China State Key Lab of Advanced Optical Communication Systems and Network Peking University Beijing China

Micro-bending with random curvature is usually used to model the mode coupling in few mode fiber (FMF). However, previous models overlooked the accompanied mode dependent loss (MDL) and neglected the order constraints of coupling loss between different modes. In this work, we calculate out the accompanied loss of each mode by using the finite element method. The results show that MDL always increases with bending curvature due to the high-order modes have larger loss than low-order modes. This observation has been confirmed by experiments. Finally, we compare the multi-segment FMFs model with and without considering the accompanied MDL, the results show that micro-bending would degrade the system performance especially when considering the accompanied MDL.

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Estimation of Kerr Nonlinearity in an Anti-resonant Hollow-Core Fiber by High-order QAM Transmission

Estimation of Kerr Nonlinearity in an Anti-resonant Hollow-C...

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2023 optical Fiber communications Conference and Exhibition, OFC 2023

作者： Ge, Dawei Gao, Shoufei Zuo, Mingqing Gao, Yuyang Wang, Yinging Yan, Baoluo Ye, Bing Zhang, Dechao Ding, Wei Li, Han Chen, Zhangyuan China Mobile Research Institute Department of Fundamental Network Technology Beijing100053 China Jinan University Institute of Photonics Technology 510632 China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China Zte Corporation Hebei065201 China

We propose a novel technique to measure Kerr nonlinearity in a hollow-core fiber based on nonlinear phase shift estimation by high-order QAM transmission. The measured n2,Kerr of the NANF-5 medium is © 2023 The A... 详细信息

ISBN: (纸本)9781957171180

关键词： Quadrature amplitude modulation

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Linewidth Compression of a Widely Tunable Hybrid Laser Through High-Q Resonance Feedback

Linewidth Compression of a Widely Tunable Hybrid Laser Throu...

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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

作者： Siyu, E. Li, Xinhang Guo, Yuyao Fan, Yihao Jin, Minhui Li, Yu Stroganov, Anton Lu, Liangjun Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China LIGENTEC SA EPFL Innovation Park Bâtiment L Ecublens1024 Switzerland

关键词： Linewidth

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Low Complexity Joint Chromatic Dispersion and Time/Frequency Offset Estimation Based on Fractional Fourier Transform

arXiv

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arXiv 2024年

作者： Xu, Guozhi Niu, Zekun Li, Lyu Hu, Weisheng Yi, Lilin State Key Lab of Advanced Optical Communication Systems and Networks School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China

We propose and experimentally validate a joint estimation method for chromatic dispersion and time-frequency offset based on the fractional Fourier transform, which reduces computational complexity by more than 50% wh... 详细信息

关键词： Frequency estimation

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Low Complexity Joint Chromatic Dispersion and Time/Frequency Offset Estimation Based on Fractional Fourier Transform

Low Complexity Joint Chromatic Dispersion and Time/Frequency...

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Asia communications and Photonics Conference and Exhibition (ACP)

作者： Guozhi Xu Zekun Niu Lyu Li Weisheng Hu Lilin Yi State Key Lab of Advanced Optical Communication Systems and Networks School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai China

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

关键词： Time-frequency analysis Fourier transforms Chromatic dispersion Accuracy Estimation optical fiber networks Robustness Decoding Computational complexity Photonics

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Logical Negation Augmenting and Debiasing for Prompt-based Methods

arXiv

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arXiv 2024年

作者： Li, Yitian Tian, Jidong He, Hao Jin, Yaohui MoE Key Lab of Artificial Intelligence AI Institute Shanghai Jiao Tong University China State Key Lab of Advanced Optical Communication System and Network Shanghai Jiao Tong University China

Prompt-based methods have gained increasing attention on NLP and shown validity on many downstream tasks. Many works have focused on mining these methods' potential for knowledge extraction, but few explore their ability to make logical reasoning. In this work, we focus on the effectiveness of the prompt-based methods on first-order logical reasoning and find that the bottleneck lies in logical negation. Based on our analysis, logical negation tends to result in spurious correlations to negative answers, while propositions without logical negation correlate to positive answers. To solve the problem, we propose a simple but effective method, Negation Augmenting and Negation Debiasing (NAND), which introduces negative propositions to prompt-based methods without updating parameters. Specifically, these negative propositions can counteract spurious correlations by providing "not" for all instances so that models cannot make decisions only by whether expressions contain a logical negation. Experiments on three datasets show that NAND not only solves the problem of calibrating logical negation but also significantly enhances prompt-based methods of logical reasoning without model retraining. Copyright © 2024, The Authors. All rights reserved.

关键词： Formal logic

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