检索结果-内蒙古大学图书馆

2017 Asia communications and Photonics Conference, ACP 2017

作者： Zhu, Mingyue Yi, Xingwen Zhang, Jing Ying, Hao Li, Xiang Luo, Ming Li, Fan Li, Zhaohui Huangi, Xiatao Qiu, Kun Key Lab.of Optical Fiber Sensing and Communications University of Electronic Science and Technology of China Chengdu611731 China State Key Laboratory of Optical Communication Technologies and Networks Wuhan Research Institute of Posts and Telecommunications Wuhan430074 China School of Electronics and Information Technology Sun Yat-Sen University Guangzhou510275 China

By overcoming various detrimental effectsina nonlinear fiber transmission using DDMZM-based optical SSB transmitter and direct-detection Kramers-Kronig receiver, we successfully demonstrate arecord transmission of I02... 详细信息

ISBN: (纸本)9781943580347

关键词： Pulse amplitude modulation

来源：评论

学校读者我要写书评

暂无评论

Fabrication and application of a graphene polarizer with strong saturable absorption

引用

Photonics Research 2016年第2期4卷 41-44页

作者： Weixiong Li Lilin Yi Ran Zheng Zhenghua Ni Weisheng Hu The State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Department of Physics Southeast University

By transferring 100 nm gold-coated CVD monolayer graphene onto the well-polished surface of D-shaped fiber, we achieve a graphene in-line polarizer with a high polarization extinction ratio of ~27 d B and low insertion loss of 5 d B at 1550 nm, meanwhile achieving a strong saturable absorption effect of 14%. The manufacture of this graphene in-line polarizer also simplifies the graphene transfer process. To explore the potential applications of the new device, we also demonstrate noise-like pulse generation and supercontinuum spectrum generation. By launching the designed graphene device into a fiber ring laser cavity, 51 nm bandwidth noise-like pulse is obtained. Then, launching the high-power noise-like pulse into high nonlinear fiber, a 1000 nm wide supercontinuum spectrum is obtained, which is favorable for sensing and nonlinearities scientific fields.

关键词： Fabrication and application of a graphene polarizer with strong saturable absorption mode PDL

来源：评论

学校读者我要写书评

暂无评论

Fast high-resolution miniature two-photon microscopy for brain imaging in freely-behaving mice at the single-spine level

Fast high-resolution miniature two-photon microscopy for bra...

引用

International Conference on Photonics and Imaging in Biology and Medicine, PIBM 2017

作者： Zong, Weijian Wu, Runlong Li, Mingli Hu, Yanhui Li, Yijun Li, Jinghang Rong, Hao Wu, Haitao Xu, Yangyang Lu, Yang Fan, Ming Zhou, Zhuan Zhang, Yunfeng Wang, Aimin Cheng, Heping Chen, Liangyi State Key Laboratory of Membrane Biology Institute of Molecular Medicine Peking-Tsinghua Center for Life Sciences Peking University Beijing100871 China Department of Cognitive Sciences Institute of Basic Medical Sciences Beijing100850 China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Department of Neurobiology Institute of Basic Medical Sciences Beijing100850 China

ISBN: (纸本)9781943580354

Recent developments in miniaturized microscopes have furthered the quest to visualize brain activities and structural dynamics in animals engaged in self-determined behaviors. However, it remains an unmet challenge to resolve activity at single dendritic spines, the elemental units underlying neuronal computation, in freely-behaving animals. Here, we report the design, testing, and application of a fast, high-resolution, miniaturized two-photon microscope (FIRM-TPM) that accomplishes this goal. With a headpiece weighing 2.15 g and a new type of hollow-core photonic crystal fiber to deliver 920-nm femtosecond laser pulses, the FIRM-TPM is capable of imaging commonly used biosensors at high spatiotemporal resolution (0.64 μm laterally and 3.35 μm axially, 40 Hz at 256 × 256 pixels). Its micro-electromechanical systems scanner also enables random-access capability and free-line scanning at up to 10,000 Hz. It compares favorably with benchtop two-photon microscopy and miniature wide-field fluorescence microscopy in the structural and functional imaging of Thy1-GFP- or GCaMP6f-labeled neurons. Further, we demonstrate its unique application and robustness with hour-long recording of neuronal activities down to the level of spines in mice experiencing vigorous body and head movements or engaging in social interaction. Thus, our new generation miniature microscope provides neuroscientists the long-sought tool-of-choice for imaging the brain at the synaptic level in freely-behaving animals. © 2017 OSA.

关键词： Photons

来源：评论

学校读者我要写书评

暂无评论

Diffraction efficiency enhancement of transient holographic gratings in nematic liquid crystals doped with Disperse Red 1

Diffraction efficiency enhancement of transient holographic ...

引用

2017 2nd International Conference on Automation,Mechanical Control and Computational Engineering(AMCCE 2017)

作者： Hongjing LI Changshun WANG State Key Lab of Advanced Optical Communication Systems and Networks Department of Physics and AstronomyShanghai Jiao Tong University

The diffraction properties of transient holographic gratings recorded by two 532 nm laser beams were investigated in nematic liquid crystals doped with Disperse Red 1.A nearly 30-fold enhancement of the first-order diffraction efficiency as a function of heating time was obtained when the sample temperature was close to the clearing point in the nematic phase.A peak shift of diffraction efficiency with the increase of recording light intensity was observed,which was attributed to laser induced photochemical nematic-isotropic phase transition.

关键词： Azo dye Liquid crystals Holographic grating

来源：评论

学校读者我要写书评

暂无评论

Reducing crosstalk of silicon-based optical switch with alloptical multi-wavelength regenerator

Reducing crosstalk of silicon-based optical switch with allo...

引用

Asia communications and Photonics Conference, ACPC 2017

作者： Wen, Feng Geng, Yong Liao, Mingle Wu, Baojian Lu, Liangjun Zhou, Linjie Zhou, Xingyu Qiu, Kun Chen, Jianping Key Lab of Optical Fiber Sensing and Communications Ministry of Education University of Electronic Science and Technology of China Chengdu611731 China Aston Institute of Photonic Technologies Aston University BirminghamB4 7ET United Kingdom State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Improving crosstalk performance of Mach-Zehnder-interferometer-type optical switches is experimentally investigated by use of an all-optical multi-wavelength regenerator. Extinction ratio and bit error rate of WDM sig... 详细信息

ISBN: (纸本)9781943580347

关键词： Crosstalk

来源：评论

学校读者我要写书评

暂无评论

Experimental Demonstration of 503.61-Gbit/s DMT over 10-km 7-Core Fiber with $1.5-\mu\mathrm{m}$ SM-VCSEL for optical Interconnects

Experimental Demonstration of 503.61-Gbit/s DMT over 10-km 7...

引用

European Conference on optical communication (ECOC)

作者： Lu Zhang Joris Van Kerrebrouck Oskars Ozolins Rui Lin Xiaodan Pang Aleksejs Udalcovs Siliva Spiga Markus C. Amann Lin Gan Ming Tang Songnian Fu Richard Schatz Gunnar Jacobsen Sergei Popov Deming Liu Weijun Tong Guy Torfs Johan Bauwelinck Xin Yin Shilin Xiao Jiajia Chen KTH Royal Institute of Technology Kista Sweden Department of Information Technology IMEC Gent Belgium Networking and Transmission Laboratory RISE AB Kista Sweden Walter Schottky Institut Technische Universität München München Germany Huazhong University of Science and Technology Wuhan China Yangtze Optical fiber and Cable Joint Stock Limited Company Wuhan China State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China

We experimentally demonstrate a net-rate 503.61-Gbit/s discrete multitone (DMT) transmission over 10-km 7-core fiber with 1.5-μm single mode VCSEL, where low-complexity kernel-recursive-least-squares algorithm is emp... 详细信息

关键词： Vertical cavity surface emitting lasers optical fibers optical fiber networks Kernel optical attenuators optical fiber dispersion

来源：评论

学校读者我要写书评

暂无评论

Low-noise 750-MHz spaced Yb:fiber frequency combs

arXiv

引用

arXiv 2018年

作者： MA, YUXUAN XU, BO ISHII, HIROTAKA MENG, FEI NAKAJIMA, YOSHIAKI MATSUSHIMA, ISAO SCHIBLI, THOMAS R. ZHANG, ZHIGANG MINOSHIMA, KAORU 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China Project 1-5-1 Chofugaoka Chofu Tokyo182-8585 Japan Department of Physics University of Colorado at Boulder 2000 Colorado Avenue BoulderCO80309-0390 United States

Growing interest of frequency combs is stimulating the development of high repetition rate combs. However, increasing the repetition rate to ∼GHz levels while maintaining tight phase locking to an optical reference w... 详细信息

关键词： Fibers

来源：评论

学校读者我要写书评

暂无评论

A generalized recurrent neural architecture for text classification with multi-task learning

arXiv

引用

arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning leverages potential correlations among related tasks to extract common features and yield performance gains. However, most previous works only consider simple or weak interactions, thereby failing to model complex correlations among three or more tasks. In this paper, we propose a multi-task learning architecture with four types of recurrent neural layers to fuse information across multiple related tasks. The architecture is structurally flexible and considers various interactions among tasks, which can be regarded as a generalized case of many previous works. Extensive experiments on five benchmark datasets for text classification show that our model can significantly improve performances of related tasks with additional information from others. Copyright © 2017, The Authors. All rights reserved.

关键词： Text processing

来源：评论

学校读者我要写书评

暂无评论

Multi-task label embedding for text classification

arXiv

引用

arXiv 2017年

作者： Zhang, Honglun Xiao, Liqiang Chen, Wenqing Wang, Yongkun Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Network and Information Center Shanghai Jiao Tong University

Multi-task learning in text classification leverages implicit correlations among related tasks to extract common features and yield performance gains. However, most previous works treat labels of each task as independent and meaningless one-hot vectors, which cause a loss of potential information and makes it difficult for these models to jointly learn three or more tasks. In this paper, we propose Multi-Task label Embedding to convert labels in text classification into semantic vectors, thereby turning the original tasks into vector matching tasks. We implement unsupervised, supervised and semi-supervised models of Multi-Task label Embedding, all utilizing semantic correlations among tasks and making it particularly convenient to scale and transfer as more tasks are involved. Extensive experiments on five benchmark datasets for text classification show that our models can effectively improve performances of related tasks with semantic representations of labels and additional information from each other. Copyright © 2017, The Authors. All rights reserved.

关键词： Embeddings

来源：评论

学校读者我要写书评

暂无评论

Few-mode fibre-optic microwave photonic links

引用

Light(Science & Applications) 2017年第1期6卷 684-691页

作者： He Wen Hongjun Zheng Qi Mo Amado Manuel Velázquez-Benítez Cen Xia Bin Huang Huiyuan Liu Huang Yu Pierre Sillard Jose Enrique Antonio Lopez Rodrigo Amezcua Correa Guifang Li CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFL 32816USA The College of Precision Instruments and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China School of Physics Science and Information Technology Shandong Provincial Key Lab of Optical Communication Science and TechnologyLiaocheng UniversityShandong 252059China State Key Laboratory of Optical Communication Technologies and Networks FiberHome Telecommunication Technologies Co.LtdWuhan Research Institute of Posts and TelecommunicationsNo.88 Youkeyuan RoadHongshan DistrictWuhan 430074China Prysmian Group Parc des Industries Artois FlandresHaisnes 62092France

The fibre-optic microwave photonic link has become one of the basic building blocks for microwave *** the optical power at the receiver is the best way to improve all link performance metrics including gain,noise figure and dynamic *** though lasers can produce and photodetectors can receive optical powers on the order of a Watt or more,the power-handling capability of optical fibres is orders-of-magnitude *** this paper,we propose and demonstrate the use of few-mode fibres to bridge this power-handling gap,exploiting their unique features of small acousto-optic effective area,large effective areas of optical modes,as well as orthogonality and walk-off among spatial *** specially designed few-mode fibres,we demonstrate order-of-magnitude improvements in link performances for single-channel and multiplexed *** work represents the first step in few-mode microwave *** spatial degrees of freedom can also offer other functionalities such as large,tunable delays based on modal dispersion and wavelength-independent lossless signal combining,which are indispensable in microwave photonics.

关键词： analogue optic-fibre link few-mode fibre fibre nonlinearity microwave photonics space-division multiplexing

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：