检索结果-内蒙古大学图书馆

44.6 fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

Chinese Optics Letters 2018年第11期16卷 58-60页

作者： Wanli Gao Guanyu Liu Zhigang Zhang State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer SciencePeking UniversityBeijing 100871China Corresponding author：***@***

44.6 fs pulses from a 257 MHz, mode-locked non-polarization maintaining Er-doped fiber laser based on a biased nonlinear amplifying loop mirror are reported. The output power is 104 mW and the single-pulse energy is 0... 详细信息

关键词： fs pulses from a 257 MHz Er:fiber laser mode-locked by biased NALM

来源：评论

学校读者我要写书评

暂无评论

Ambient Light Suppressed Free Space optical communication system based on FADOF

Ambient Light Suppressed Free Space Optical Communication Sy...

引用

International Conference on optical communications and networks (ICOCN)

作者： Zhen Yang Xiaolei Guan Bin Luo Longfei Yin Guanjun Gao Jinbiao Chen State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing China State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing China School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing China

In this paper, a wireless optical communication system based on Faraday anomalous dispersion optical filter (FADOF) is proposed to suppress the ambient light. Experimental results show that the Q factor of 20Mbit/s OF... 详细信息

关键词： optical filters Q-factor Bandwidth optical fiber communication Filtering optical attenuators optical fibers

来源：评论

学校读者我要写书评

暂无评论

Unidimensional continuous-variable measurement- device-independent quantum key distribution

arXiv

引用

arXiv 2019年

作者： Bai, Dongyun Huang, Peng Zhu, Yiqun Ma, Hongxin Xiao, Tailong Wang, Tao Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai200240 China School of Electronic Information Shanghai Dianji University Shanghai201306 China

Continuous-variable (CV) measurement-device-independent (MDI) quantum key distribution (QKD) is immune to imperfect detection devices, which can eliminate all kinds of attacks on practical detectors. Here we first propose a CV-MDI QKD scheme using unidimensional modulation (UD) in general phase-sensitive channels. The UD CV-MDI QKD protocol is implemented with the Gaussian modulation of a single quadrature of the coherent states prepared by two legitimate senders, aiming to simplify the implementation compared with the standard, symmetrically Gaussian-modulated CVMDI QKD protocol. Our scheme reduces the complexity of the system since it ignores the requirement in one of the quadrature modulations as well as the corresponding parameter estimations. The security of our proposed scheme is analyzed against collective attacks, and the finite-size analysis under realistic conditions is taken into account. UD CV-MDI QKD shows a comparable performance to that of its symmetrical counterpart, which will facilitate the simplification and practical implementation of the CV-MDI QKD protocols. Copyright © 2019, The Authors. All rights reserved.

关键词： Modulation

来源：评论

学校读者我要写书评

暂无评论

Non-mechanical beam-steer lidar system based on swept-laser source

Non-mechanical beam-steer lidar system based on swept-laser ...

引用

optical Fiber Sensors, OFS 2018

作者： Zhai, Yuyao Liu, Qingwen Li, He Chen, Dian He, Zuyuan State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China

ISBN: (纸本)9781943580507

We have proposed a non-mechanical beam-steer lidar system, in which the laser sweeps to realize 1-D beam steering and ranging simultaneously. In the demonstrational experiment, angular coverage of 17◦ is achieved with a steering resoluiton of 0.11◦. Meanwhile, the distance resolution is 1.85 mm over a distance of 1 m. © OSA 2018 © 2018 The Author(s)

关键词： optical radar

来源：评论

学校读者我要写书评

暂无评论

Fast dynamic strain measurement using BOCDA enhanced with injection locking configuration

Fast dynamic strain measurement using BOCDA enhanced with in...

引用

optical Fiber Sensors, OFS 2018

作者： Wang, Bin Fan, Xinyu He, Zuyuan State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

A novel fast BOCDA system to measure dynamic strain without using lock-in-amplifier is developed, and the accuracy is improved using an injection-locking technique. A 200,000-points/s sampling rate and an 8-cm spatial... 详细信息

ISBN: (纸本)9781943580507

关键词： Fiber optic sensors

来源：评论

学校读者我要写书评

暂无评论

Demonstration of 10-Gb/s, 5-GHz spaced coherent UDWDM-PON with Digital signal processing in real-time

Demonstration of 10-Gb/s, 5-GHz spaced coherent UDWDM-PON wi...

引用

optical Fiber communication Conference, OFC 2018

作者： Luo, Ming Zeng, Tao Yi, Lilin Li, Jie Li, Xiang Yang, Qi Xue, Lei State Key Laboratory of Optical Comm. Technologies and Networks Wuhan430074 China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan430074 China

This paper experimentally demonstrate the real-time field trial of 40×10-Gb/s coherent UDWDM-PON at 5-GHz spacing over 40-km field-installed fiber. The system stability is demonstrated by 8-hour real-time BER mea... 详细信息

ISBN: (纸本)9781943580385

关键词： system stability

来源：评论

学校读者我要写书评

暂无评论

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

arXiv

引用

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 label 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

来源：评论

学校读者我要写书评

暂无评论

Automatic generation of personalized comment based on user profile

arXiv

引用

arXiv 2019年

作者： Zeng, Wenhuan Abuduweili, Abulikemu Li, Lei Yang, Pengcheng School of Mathematical Sciences Peking University State Key Lab of Advanced Optical Communication System and Networks School of EECS Peking University School of Computer Science and Technology Xidian University MOE Key Lab of Computational Linguistics School of EECS Peking University

Comments on social media are very diverse, in terms of content, style and vocabulary, which make generating comments much more challenging than other existing natural language generation (NLG) tasks. Besides, since different user has different expression habits, it is necessary to take the user's profile into consideration when generating comments. In this paper, we introduce the task of automatic generation of personalized comment (AGPC) for social media. Based on tens of thousands of users' real comments and corresponding user profiles on weibo, we propose Personalized Comment Generation Network (PCGN) for AGPC. The model utilizes user feature embedding with a gated memory and attends to user description to model personality of users. In addition, external user representation is taken into consideration during the decoding to enhance the comments generation. Experimental results show that our model can generate natural, human-like and personalized comments.1. Copyright © 2019, The Authors. All rights reserved.

关键词： User profile

来源：评论

学校读者我要写书评

暂无评论

Carrier-phase estimation for simultaneous quantum key distribution and classical communication using a real local oscillator

引用

Physical Review A 2019年第2期99卷 022318-022318页

作者： Tao Wang Peng Huang Shiyu Wang Guihua Zeng State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai 200240 China College of Information Science and Technology Northwest University Xi'an 710127 Shaanxi China

The simultaneous quantum and classical communication (SQCC) protocol is an appealing protocol since it allows continuous-variable quantum key distribution (CV-QKD) and classical communication to be implemented simultaneously by using the same communication infrastructure and on a single wavelength. However, the main challenge of the SQCC protocol is its low tolerance of phase noise, limiting the transmission distance under the real local oscillator (LO) design. To eliminate the phase drift without the aid of the reference signal, the classical carrier phase estimation (CPE) algorithm in the field of coherent optical communication is employed for phase recovery and data extraction. Besides, the power of the residual phase noise in classical communication and the power of the excess phase noise in CV-QKD are derived, including the effects of the employed laser linewidth, the transversal filter length, and the classical signal power. On this basis, the performances of the SQCC protocol under the trusted and the untrusted phase noise model are discussed, respectively. Our work confirms the feasibility of the CPE algorithm in the SQCC protocol and demonstrates the conditions required for this protocol to operate on a coherent optical communication system.

关键词： optical quantum information processing Quantum communication Quantum cryptography Quantum information architectures & platforms Quantum information processing Quantum information processing with continuous variables

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2018

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

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：