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检索条件"机构=State Key Lab of Advanced Optical Communication Systems and Network"

共 608 条记录，以下是21-30 订阅

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Driverless 400-Gbps/λ PS-PAM16 Transmission Using Packaged 60-GHz Thin-Film LiNbO3 Modulator with 16-fJ/bit Energy Efficiency

Driverless 400-Gbps/λ PS-PAM16 Transmission Using Packaged ...

引用

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

作者： Wang, Shangcheng Yang, Yu Xu, Zhaopeng Liu, Lulu Qiao, Gang Ji, Honglin Wei, Jinlong He, Zhixue Hu, Weisheng Peng Cheng Laboratory Shenzhen China Shanghai Jiao Tong University State Key Lab of Advanced Optical Communication Systems and Networks Shanghai China

ISBN: (纸本)9798350312614

We experimentally demonstrated line rate 300-Gb/s PAM4 and 400-Gb/s probabilistically shaped (PS)-PAM16 transmission using packaged thin-film LiNbO3 modulators with only 550-mVpp CMOS-class driving voltage requiring no radio-frequency (RF) amplifiers. Net 296-Gbit/s PS-PAM16 transmission is achieved using 60-GHz transceivers with only 15.5-fJ/bit energy efficiency © 2023 IEEE.

关键词： High energy efficiency High-speed optical interconnects IM-DD LiNbO3 modulator

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PLC Splitter Encoded with Waveguide Bragg Grating by Femtosecond Laser Inscribing Technique for PON Monitoring

PLC Splitter Encoded with Waveguide Bragg Grating by Femtose...

引用

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

作者： Hu, Jin Liu, Xu Ma, Lin Li, Heyuan He, Zuyuan State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China Zhejiang Lab Hangzhou311121 China

We demonstrate a PLC splitter encoded by Bragg waveguide gratings with a wavelength interval of 4 nm and an adjustable reflectance of up to 40% using a femtosecond laser inscribing technique for passive optical networ... 详细信息

ISBN: (纸本)9798350312614

关键词： Femtosecond laser optical network monitoring PLC splitter Waveguide Bragg Gratings

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Non-volatile Electrically Reconfigurable optical MZI Integrated with Sb2Se3Sub-cell Arrays for High Endurance Switching 49

Non-volatile Electrically Reconfigurable Optical MZI Integra...

引用

49th European Conference on optical communications, ECOC 2023

作者： Yang, Xing Lu, Liangjun Li, Yu Chen, Jianping Zhou, Linjie 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

We demonstrated an electrical-driven non-volatile MZI based on low-loss Sb2Se3 sub-cell arrays. By constraining the material reflow in the sub-cells, optical transmission contrast of > 5 dB was achieved with > 1... 详细信息

ISBN: (纸本)9781839539954

关键词： Light transmission

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Narrow-linewidth and frequency-agile FMCW laser on the Si3N4 -on-SOI photonic platform

Narrow-linewidth and frequency-agile FMCW laser on the Si3N4...

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Liu, Chuxin Li, Xinhang Guo, Yuyao Lu, Liangjun Chen, Jianping Zhou, Linjie 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

We demonstrate a hybrid-integrated self-injection-locked laser on the Si3N4-on-SOI platform to generate FMCW signal with 9 kHz linewidth, 2 MHz repetition rate, and high linearity, supporting FMCW-LiDAR with refresh r... 详细信息

ISBN: (纸本)9781957171395

关键词： Linewidth

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Amplitude-Invariant Phase Shifter Based on Carrier-Injection Mechanism for optical Phased Array

Amplitude-Invariant Phase Shifter Based on Carrier-Injection...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Yuan, Qiqi Xu, Weihan Ran, Shihuan Yang, Yunhong Lu, Liangjun Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab 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

We present an amplitude-invariant phase shifter based on a PIN diode embedded in a Mach-Zehnder Interferometer for optical phased arrays. The dynamic power contrast is lower than 0.42 dB over a π phase shift. CLEO 20... 详细信息

ISBN: (纸本)9781957171395

关键词： Mach-Zehnder interferometers

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Two-Stage Topic Sentence Extraction for Chinese Student Essays 12th

Two-Stage Topic Sentence Extraction for Chinese Student Ess...

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12th National CCF Conference on Natural Language Processing and Chinese Computing, NLPCC 2023

作者： Dong, Yuwu Zheng, Feiran Chen, Hongyu Ding, Yizhou Zhou, Yifan He, Hao MoE Key Lab of Artificial Intelligence AI Institute Shanghai Jiao Tong University Shanghai China State Key Lab of Advanced Optical Communication System and Network Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9783031446986

In this paper, we present the method proposed by our team for Track 2 of NLPCC 2023 Shared Task 7, which focuses on the extraction of paragraph-level and whole essay topic sentences in middle school student essays. This paper proposes a two-stage topic sentence extraction framework for each paragraph and the whole essay. In the first stage, we extract topic sentences for each paragraph, considering local semantic and contextual aspects. In the second stage, we derive the text topic sentence for the whole essay from the extracted paragraph-level topic sentences. Compared with the one-stage method, the two-stage method which can focus on the local semantic information of paragraphs related to the task has advantages in paragraph and full-text topic sentence extraction. Comparative experiments show that the extraction performance of the fine-tuned two-stage topic sentence extraction framework surpasses the few-shot large language models (GPT-3.5 et al.). The final comprehensive index also achieved the first-place result in this track. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Semantics

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Amplitude-Invariant Phase Shifter Based on Carrier-Injection Mechanism for optical Phased Array

Amplitude-Invariant Phase Shifter Based on Carrier-Injection...

引用

CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Yuan, Qiqi Xu, Weihan Ran, Shihuan Yang, Yunhong Lu, Liangjun Chen, Jianping Zhou, Linjie 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

关键词： Phase shifters

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Bandwidth Enhancement of Silicon Thermo-Optic Phase Shifter with Electronic-Photonic Co-Design

Bandwidth Enhancement of Silicon Thermo-Optic Phase Shifter ...

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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： Han, keyi Lu, Liangjun Li, Xin Liu, Chuxin Xu, Weihan Guo, Yuyao Chen, Jianping Zhou, Linjie 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

Based on a resistance-capacitance equalizer, we demonstrated a silicon thermo-optic phase shifter with a rise time of 2.3 µs and a modulation bandwidth of 250 kHz, offering 10 times enhancement over the original ... 详细信息

ISBN: (纸本)9781957171395

关键词： Silicon photonics

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Ontology-Semantic Alignment On Contrastive Video-Language Model for Multimodel Video Retrieval Task 23

Ontology-Semantic Alignment On Contrastive Video-Language Mo...

引用

Proceedings of the 2023 7th International Conference on Computer Science and Artificial Intelligence

作者： Yifan Zhou Yizhou Ding Yuwu Dong Hao He Shanghai Jiao Tong University State Key Lab of Advanced Optical Communication System and Network China

ISBN: (纸本)9798400708688

Contrastive Learning-based models have shown impressive performance in text-image retrieval tasks. However, when applied in video retrieval, traditional contrastive learning strategies have faced challenges in achieving satisfactory results due to redundancy of video contents. We discern several potential reasons: (1)Current methodologies sometimes overlook the significant information imbalance between videos and query text, specifically neglecting the in-depth textual representation of the content within the videos. (2) Current video matching methodologies typically focus on cross-model alignment at general entity similarity level, without specific consideration for how entity pair preferences and similarity properties affect the task at hand. (3) Previous vectorized retrieval based on video content features have been somewhat flawed. They primarily focused on aligning overall features without having an video content tags feature for meaningful feature discrimination. Considering the shortcomings identified in the mentioned three aspects, we propose an ontology semantic labels augments retrieval model and introduce a method to integrate video ontology semantic labels into the contrastive learning framework. In particular, we have developed ontology semantic descriptions about entities encompassing both human figures and textual elements within the videos. Subsequently, we conducted training and testing on the CMIVQA dataset to assess the performance of our approach. The experimental results show that employing fine-grained ontology labels as sample pairs for contrastive learning leads to an increased level of precision in video retrieval tasks.

关键词： Multimodal alignment Ontology description Video content understanding

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LDSeq: Latent Diffusion Models for Sequence to Sequence Text Generation 23

LDSeq: Latent Diffusion Models for Sequence to Sequence Text...

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Proceedings of the 2023 7th International Conference on Computer Science and Artificial Intelligence

作者： Yizhou Ding Jidong Tian Shanxing Mei Yifan Zhou Yuwu Dong Hao He Weisheng Hu State Key Lab of Advanced Optical Communication System and Network Shanghai Jiao Tong University China

ISBN: (纸本)9798400708688

Diffusion models have demonstrated remarkable success in generating continuous data, such as images and audios. Previous studies on text generation employing continuous diffusion models have revealed the potential of the diffusion framework. However, challenges like embedding collapse persist, limiting the overall generation performance. In this paper we introduce LDSeq, a latent diffusion framework employing a two-stage training procedure for sequence-to-sequence text generation. In the proposed framework, we first train a Variational Auto-Encoder (VAE) on downstream datasets to compress the target text of samples into a continuous latent space, and then we train a conditional latent diffusion model in the fixed continuous latent space, where the latent vectors are iteratively sampled conditioned on the input source text. The disjoint training stages prevent the collapse of diffusion space. Experimental results on paraphrase generation and text summarization datasets show that LDSeq achieves comparable or superior performance in comparison to AR and NAR baselines while requiring lower training cost. Furthermore, We discuss some potential future directions for enhancing diffusion models in the text generation domain.

关键词： Diffusion probabilistic models Latent variable models Sequence-to-sequence text generation

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