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28th International Conference on Computational Linguistics, COLING 2020

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

ISBN: (纸本)9781952148279

Paraphrase generation aims to generate semantically consistent sentences with different syntactic realizations. Most of the recent studies rely on the typical encoder-decoder framework where the generation process is deterministic. However, in practice, the ability to generate multiple syntactically different paraphrases is important. Recent work proposed to cooperate variational inference on a target-related latent variable to introduce the diversity. But the latent variable may be contaminated by the semantic information of other unrelated sentences, and in turn, change the conveyed meaning of generated paraphrases. In this paper, we propose a semantically consistent and syntactically variational encoder-decoder framework, which uses adversarial learning to ensure the syntactic latent variable be semantic-free. Moreover, we adopt another discriminator to improve the word-level and sentence-level semantic consistency. So the proposed framework can generate multiple semantically consistent and syntactically different paraphrases. The experiments show that our model outperforms the baseline models on the metrics based on both n-gram matching and semantic similarity, and our model can generate multiple different paraphrases by assembling different syntactic variables. © 2020 COLING 2020 - 28th International Conference on Computational Linguistics, Proceedings of the Conference. All rights reserved.

关键词： Syntactics

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A low-CD weakly-coupled FMF for short-reach IM/DD MDM transmission

A low-CD weakly-coupled FMF for short-reach IM/DD MDM transm...

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49th European Conference on optical communications (ECOC 2023)

作者： R. Cheng Q. He M. Zuo J. Zhang C. Peng Y. Gao Z. Chen Y. He J. Li State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 People's Republic of China Department of Fundamental Network Technology China Mobile Research Institute Beijing 100053 People's Republic of China Fiberhome Fujikura Optic Technology Co. Ltd People's Republic of China

Based on an accurate model for the relationship between refractive indices and wavelengths in germanium-doped fibers, a weakly-coupled low-chromatic dispersion (CD) FMF is designed and fabricated with CD values lying ...

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Demonstration of a Rectangular Core Few-mode Fiber with Ultra-low Differential Group Delay

Demonstration of a Rectangular Core Few-mode Fiber with Ultr...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Ruihuan Zhang Gang Chen Yuanhang Zhang Liangming Xiong Haoshuo Chen Nicolas K. Fontaine Yikai Su Department of Electronic Engineering State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China Nokia Bell Labs Holmdel NJ USA State Key Laboratory of Optical Fiber and Cable Manufacture Technology Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC) Wuhan China

We design and experimentally demonatrate a rectangular core few-mode fiber that can support the transmission of TE 00 /TM 00 , TE 10 /TM 10 and TE 20 /TM 20 modes with ultra-low differential group delays.

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： optical fiber polarization Multiplexing Laser modes Delays Electo-optic effects Fiber lasers

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Transfer Function Equalization Enhanced Phase Noise in Generalized Carrier Assisted Differential Detection Receivers

Transfer Function Equalization Enhanced Phase Noise in Gener...

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European Conference on optical communication (ECOC)

作者： Honglin Ji Jingchi Li Xingfeng Li Zhen Wang Ranjith Rajasekharan Unnithan Yikai Su Weisheng Hu William Shieh Peng Cheng Laboratory Shenzhen China Department of Electrical and Electronic Engineering The University of Melbourne VIC Australia State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We analyze the equalization enhanced phase noise (EEPN) in carrier-assisted differential detection (CADD) and its dependence on the receiver transfer function. For CADD, by using optical filters instead of a pure opti... 详细信息

ISBN: (数字)9781957171159

ISBN: (纸本)9781665475570

关键词： optical filters Phase noise Laser noise Transfer functions Europe optical receivers optical fiber communication

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FMCW Source based on a Hybrid Integrated III-V/ Si-Si3N4 Dual-Layer External Cavity Laser

FMCW Source based on a Hybrid Integrated III-V/ Si-Si3N4 Dua...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Xinhang Li Yuyao Guo Chuxin Liu Xin Li Minhui Jin Siyu E Weihan Xu 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 frequency-modulated continuous-wave laser on a Si-Si 3 N 4 dual-layer platform with 21.9 mW output power, >56.5 dB side mode suppression ratio, >100 nm tuning range, and 895 H... 详细信息

ISBN: (数字)9781957171050

ISBN: (纸本)9781665466660

关键词： Power lasers Lasers and electrooptics Laser modes Hybrid power systems Laser tuning Electrooptical waveguides Power generation

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Single-Shot Frequency-resolved Imbalance Characterization for Coherent Transceivers Based on Inter-channel Response Ratio

Single-Shot Frequency-resolved Imbalance Characterization fo...

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European Conference on optical communication (ECOC)

ISBN: (数字)9781957171159

ISBN: (纸本)9781665475570

We propose a simple but efficient method to simultaneously characterize the frequency-resolved IQ and polarization imbalance by a single-shot measurement for coherent transceivers based on the simple inter-channel response ratio. We demonstrate the characterization through a successful transmission of a 75-Gbaud PCS-256QAM signal with a 1.05-Tb/s raw data rate.

关键词： Europe Receivers Transceivers optical fiber communication Frequency measurement Calibration Standards

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Integrated multiplexing and switching in wavelength, polarization and mode

Integrated multiplexing and switching in wavelength, polariz...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Yikai Su Yu He Ruihuan Zhang Yong Zhang Department of Electronic Engineering State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We review recent results on integrated silicon photonic chips for (de)multiplexing and switching, which operate in wavelength, polarization, and mode dimensions.

关键词： Multiplexing Switches Lasers and electrooptics Silicon photonics Laser modes System-on-chip Electrooptical waveguides

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A Fully 3D Printed Accelerometer for Movement Monitoring Applications 17

A Fully 3D Printed Accelerometer for Movement Monitoring App...

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17th IEEE International Conference on Nano/Micro Engineered and Molecular systems, NEMS 2022

作者： Liu, Guandong Wang, Changhai Luo, Ruiqi Jia, Zhili Hou, Maojing Ma, Wei Intelligent Network Research Institute Zhejiang Lab Hangzhou311100 China Heriot-Watt University Institute of Sensors Signals and Systems School of Engineering & Physical Sciences EdinburghEH14 4AS United Kingdom Zhejiang University State Key Lab. of Mod. Optical Instrum. College of Information Science and Electronic Engineering Hangzhou310027 China National Institute of Metrology Center for Advanced Measurement Science Beijing100029 China

ISBN: (纸本)9781665483018

This paper presents a fully 3D printed accelerometer. With a multi-extruder 3D printer, the conductive PLA (polylactic acid) filament material was selectively printed on the normal PLA substrates to form the electrodes for the device. Therefore, both the conductive electrodes and the nonconductive mechanical structures of the capacitive accelerometer can be fully 3D printed within one hour without using any additional patterning process and metallization process. Compared with the traditional silicon- based fabrication methods, this approach is much faster and can fulfill the increasing demands of personalized customization. The fully 3D printed accelerometer had a sensitivity of 0.48 V/g, a nonlinearity error of 1.16% and exhibited good dynamic characteristics, which indicate the 3D printed device has a potential to be applied in movement monitoring in real time. The work demonstrates a fast and low-cost method for MEMS devices fabrication. © 2022 IEEE.

关键词： Accelerometers

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Ultra-compact beam steering nanolasers

arXiv

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arXiv 2024年

作者： Chen, Xinghong Gu, Mingxuan Tang, Jiankai Sang, Yungang Xiang, Bingrui Zhang, Kong Zhang, Guanjie Wang, Xingyuan Guo, Xuhan Zhou, Linjie Wu, Wengang Mao, Yifei School of Sensing Science and Engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China Institute of Microelectronics Chinese Academy of Sciences Beijing100029 China College of Mathematics and Physics Beijing University of Chemical Technology Beijing100029 China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China 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 National Key Laboratory of Science and Technology on Micro/Nano Fabrication School of Integrated Circuits Peking University Beijing100871 China Beijing Advanced Innovation Center for Integrated Circuits Beijing100871 China Frontiers Science Center for Nano-optoelectronics Peking University Beijing100871 China

The miniaturization and integration of beam steering devices have consistently been the focus of the field. Conventional methods alter the eigenmode of the optical cavity by regulating the refractive index. Due to the weak nonlinear effect of the optical system, the device must be sufficiently large to achieve sufficient light modulation. The effective method for miniaturizing beam steering devices currently in use is based on metasurfaces. However, this type of device necessitates the input of a laser source, which precludes the simultaneous generation and control of light in a single device. Here we propose a miniaturized beam steering device that employs mode selection between different bound states in the continuum (BIC) states through phase change material. The device is capable of simultaneously achieving both light generation and beam steering (33°) in a single device with a size of only 25 μm and with a low threshold of 8.9 kW cm-2. Furthermore, it is possible to achieve a significant degree of dynamic wavelength tunability, with a range extending up to 296 nm. This method achieves high-efficient regulation of light properties by dynamically controlling the system’s topological charge, circumventing the problem of weak nonlinearity in traditional methods. Furthermore, the integration of phase change materials with nanolasers enables the direct alteration of lasing properties, which provides a novel idea for dynamic light control. The device process scheme based on phase change materials is straightforward, direct, and highly compatible, which will be advantageous for its intended application. Copyright © 2024, The Authors. All rights reserved.

关键词： Phase change materials

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Design and Fabrication Optimization of Low-Crosstalk Silicon Arrayed Waveguide Gratings with 32 Channels and 100-Ghz Spacing

SSRN

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SSRN 2022年

作者： Xie, Changjian Zou, Xihua Zou, Fang Zhang, Yong Yan, Lianshan Pan, Wei School of Information Science & Technology Southwest Jiaotong University Sichuan Chengdu610031 China State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

To satisfy the stringent requirements of large-capacity optical communication systems, the high-performance silicon arrayed waveguide gratings (AWG) with 32 wavelength channels and 100 GHz spacing are designed and fabricated. First of all, three types of arrayed waveguides are designed for seeking better performances, including rectangular-type, arc-type, and S-type ones. During fabrication, the taper connector is then introduced and the waveguide sidewall is further smoothed. Among the samples fabricated using E-beam lithography (EBL), the one with rectangular-type arrayed waveguides is characterized with better performance, showing a crosstalk of -14 dB and an insertion loss of 7.5 dB. Then, the target design with rectangle arrayed waveguides is further optimized and fabricated using 180-nm lithography platform for massive production. Outstanding results are achieved with an insertion loss of 4.5 dB, a channel uniformity of 0.95 dB, and a crosstalk as low as -20.4 dB, respectively. As far as we know, the AWGs might be the first compact silicon one fabricated by commercial lithography platform, characterized by comprehensive specifications (i.e., lowest crosstalk, highest channel uniformity, lowest insertion loss) for massive 100-GHz wavelength multiplexing/de-multiplexing. © 2022, The Authors. All rights reserved.

关键词： Crosstalk

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