检索结果-内蒙古大学图书馆

2024 Asia Communications and Photonics Conference, ACP 2024 and International Conference on Information Photonics and optical Communications, IPOC 2024

作者： Chang, Huajin Shen, Bitao Wang, Haoyu Wang, Yimeng Chen, Ruixuan He, Yandong Shu, Haowen Wang, Xingjun State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China School of Integrated Circuits Peking University Beijing China

ISBN: (纸本)9798350379266

Integrated optical nonlinearities have spawned many new technologies such as optical parametric oscillators and microcombs. Despite remarkable achievements, optical parametric oscillation (OPO) and microcomb generation remain challenging for foundry-available silicon photonics. Silicon-photonic platform provides mature CMOS manufacturing process and relatively high nonlinear coefficient. However, the nonlinear absorption at near-infrared telecommunication band hinders the effective nonlinear response on silicon photonics. In addition, the 220 nm thick Si layer is unsuitable for anomalous dispersion waveguides, which is necessary for OPO process. In this work, a concentric microresonator with the PIN doping structure is designed to solve these two problems. Under reverse bias on the designed PIN structure, the generated free carriers are effectively migrated to weaken the free carrier absorption. Local anomalous dispersion is induced by the designed concentric structure. optical parametric oscillation is theoretically analyzed and 10 OPO sidebands are experimentally generated with a single pump. Our design verifies the ability of dispersion engineered nonlinear oscillators in C-band on foundry-available silicon photonic platform. © 2024 IEEE.

关键词： Silicon photonics

来源：评论

学校读者我要写书评

暂无评论

Hierarchical Codebook Design Using Scale-Changeable Reconfigurable Holographic Surfaces in Near-Far Field Communications

Hierarchical Codebook Design Using Scale-Changeable Reconfig...

引用

2024 IEEE Global Communications Conference, GLOBECOM 2024

作者： Zhang, Shupei Di, Boya Zhang, Hongliang Poor, H. Vincent Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing China Princeton University Department of Electrical and Computer Engineering Princeton United States

ISBN: (纸本)9798350351255

Reconfigurable holographic surfaces (RHSs) have been proposed as a cost-effective and power-efficient solution for extremely large-scale arrays, where the amplitude of electromagnetic waves radiated at each element is controlled to achieve high directive gain. However, the complexity of acquiring real-time channel state information (CSI) required for beamforming is prohibitively high, especially when the near-field expansion brought by the large-scale RHS is considered. In this paper, we propose a codebook-based beam training scheme for a large-scale RHS-enabled communication system to bypass CSI estimation. Unlike traditional phase-controlled arrays, the amplitude-controlled property of the RHS implies that each RHS element can be selectively activated. This motivates an array reconfiguration method where a scale-changeable RHS array is constructed to generate gain-flat beams with different coverage in the angle-range domain. A hierarchical RHS codebook is then proposed where the coverage of the codewords in each layer is progressively refined. To address the substantial beam search overhead in the near-far field, a two-stage beam training scheme is performed in the proposed codebook, thereby reducing the overhead to a logarithmic level of the element number. The simulation results show that the proposed scheme performs better than phased arrays given the same input power in terms of sum rate, and it also approaches the upper bound achieved by the exhaustive search at a significantly reduced overhead. © 2024 IEEE.

关键词： Antenna phased arrays

来源：评论

学校读者我要写书评

暂无评论

1780-km Reach Extension with Equalization-Enhanced Phase Noise Compensation Using 3-MHz LO for WDM Coherent Transmission

1780-km Reach Extension with Equalization-Enhanced Phase Noi...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Yixiao Zhu Xiansong Fang Xiang Cai Yimin Hu Weisheng Hu Fan Zhang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University Shanghai China State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Peking University Beijing China Pengcheng Laboratory Shenzhen China

ISBN: (数字)9798350379266

ISBN: (纸本)9798350379273

We propose and experimentally demonstrate an efficient equalization-enhanced phase noise compensation scheme for long-haul coherent transmission. The distance is extended by 1780km and 470km for $\mathbf{788.4}-\mathbf{Gb}/\mathbf{s}/\boldsymbol{\lambda}$ and 968.4- $\mathbf{Gb}/\mathbf{s}/\boldsymbol{\lambda}$ line rate WDM transmission, respectively, using 3-MHz LO and receiver-side dispersion compensation.

关键词： Phase noise Laser noise Asia Wavelength division multiplexing optical fiber communication optical transmitters Time-domain analysis Dispersion Photonics

来源：评论

学校读者我要写书评

暂无评论

Broadband Arbitrary Coupler Based on Asymmetric Mach-Zehnder Interferometers with Bezier Curves

Broadband Arbitrary Coupler Based on Asymmetric Mach-Zehnder...

引用

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

作者： Chen, Jiaqi Liu, Yuanbin Ni, Ziheng Lu, Liangjun Chen, Jianping Zhou, Linjie Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai China

We propose a broadband coupler based on cascaded Mach-Zehnder interferometers with Bezier curves on the silicon nitride platform, which has a wide operation wavelength range of 110 nm and good width/thickness fabricat... 详细信息

ISBN: (纸本)9798350312614

关键词： Bezier curve broadband coupler silicon nitride

来源：评论

学校读者我要写书评

暂无评论

Integrated sensing and communication in an optical fibre

引用

Light(Science & Applications) 2023年第5期12卷 729-742页

作者： Haijun He Lin Jiang Yan Pan Anlin Yi Xihua Zou Wei Pan Alan E.Willner Xinyu Fan Zuyuan He Lianshan Yan Center for Information Photonics&Communications School of Information Science and TechnologySouthwest Jiaotong University611756 ChengduSichuanChina Peng Cheng Laboratory 518052 ShenzhenChina Optical Fiber Communications Laboratory University of Southern CaliforniaLos AngelesCA 90089USA State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University200240 ShanghaiChina

The integration of high-speed optical communication and distributed sensing could bring intelligent functionalities to ubiquitous optical fibre networks,such as urban structure imaging,ocean seismic detection,and safety monitoring of underground embedded *** work demonstrates a scheme of integrated sensing and communication in an optical fibre(ISAC-OF)using the same wavelength channel for simultaneous data transmission and distributed vibration *** scheme not only extends the intelligent functionality for optical fibre communication system,but also improves its transmission performance.A periodic linear frequency modulation(LFM)light is generated to act as the optical carrier and sensing probe in PAM4 signal transmission and phase-sensitive optical time-domain reflectometry(Φ-OTDR),*** a 24.5 km fibre transmission,the forward PAM4 signal and the carriercorrespondence Rayleigh backscattering signal are detected and *** results show that the integrated solution achieves better transmission performance(~1.3 dB improvement)and a larger launching power(7 dB enhancement)at a 56 Gbit/s bit rate compared to a conventional PAM4 signal ***,a 4m spatial resolution,4.32-nε/√Hz strain resolution,and over 21 kHz frequency response for the vibration sensing are *** proposed solution offers a new path to further explore the potential of existing or future fibre-optic networks by the convergence of data transmission and status *** addition,such a scheme of using shared spectrum in communication and distributed optical fibre sensing may be used to measure non-linear parameters in coherent optical communications,offering possible benefits for data transmission.

关键词： communication optical fibre

来源：评论

学校读者我要写书评

暂无评论

High-Precision Fiber-Optic Time Transfer system Based on Bidirectional FDM and Correlation Processing

High-Precision Fiber-Optic Time Transfer System Based on Bid...

引用

2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium, EFTF/IFCS 2023

作者： Xie, Kunfeng Hu, Liang Chen, Jianping Wu, Guiling Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering China Shanghai Jiao Tong University Shanghai Key Laboratory of Navigation and Location Based Services Shanghai China

ISBN: (纸本)9798350311426

We report on a high-precision fiber-optic time transfer system over single optical fiber utilizing the same wavelength in both directions based on bidirectional frequency division multiplexing and cross correlation processing (BFDM-CR). The probe signals and the backscattering noises are effectively discriminated by electrical bandpass filtering for the non-overlapping spectrum of the bidirectional transmission signals. In this way, the impact of the Rayleigh backscattering and the dispersion-induced symmetric deviation over fiber link can be suppressed at the same time. The time interval of the received signals and the local signals is obtained by cross correlation processing to improve the SNR of the measurement on the time interval. A time transfer system based on BFDM-CR over 50km fiber-link is experimentally demonstrated. The stabilities in terms of time deviation (TDEV) are less than 19.2 ps/s and 2.2 ps/10000s, respectively. © 2023 IEEE.

关键词： fiber-optic frequency division multiplexing time transfer

来源：评论

学校读者我要写书评

暂无评论

Transverse Force Sensing for Large-scale Array Applications Based on Mode Coupling in FMF

Transverse Force Sensing for Large-scale Array Applications ...

引用

2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Zhang, Jiarui Jia, Junchi Qiao, Gang Cheng, Ruiting Zuo, Mingqing Chen, Zhangyuan He, Yongqi Li, Juhao State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing100871 China Peng Cheng Laboratory Shenzhen518055 China

We propose a transverse force sensing scheme for large-scale array applications based on linearly-polarized mode coupling in few-mode fibers, and experimentally demonstrate the feasibility for human sleeping postures ...

ISBN: (纸本)9781957171258

关键词：

来源：评论

学校读者我要写书评

暂无评论

Beam-scanning Antenna with High Chirality

Beam-scanning Antenna with High Chirality

引用

2023 Cross Strait Radio Science and Wireless Technology Conference, CSRSWTC 2023

作者： Lei, Yu-Lu Zhang, Yue-Yi Zhang, Zi-Wen Du, Chao-Hai Center for Carbon-based Electronics Networks School of Electronics State Key Laboratory of Advanced Optical Communication Systems Peking University China

ISBN: (纸本)9798350358971

Chirality finds applications in various fields such as communication, sensing, and detection. However, existing methods have limitations in generating highly circular polarized radiation. In this study, we have introduced a novel approach to achieve highly circularly polarized radiation. Based on the spin momentum locking property of the spoof surface plasmon polaritons, a set of cylinders is introduced to facilitate the coupling of the strongly confined surface wave into radiation. This radiation carries spin angular momentum, which aligns with the transverse spin angular momentum, resulting in circular polarization. The proposed structure also enables beam scanning functionality, which is experimentally validated through the fabrication of an antenna. Overall, our scheme holds promise for generating highly circularly polarized radiation with applications in a wide range of fields. © 2023 IEEE.

关键词： chirality spin angular momentum spin momentum locking surface plasmon polaritons

来源：评论

学校读者我要写书评

暂无评论

Validating the First-Order Topological Charge of Vortex Smith-Purcell Radiation 15

Validating the First-Order Topological Charge of Vortex Smit...

引用

15th International Conference on Microwave and Millimeter Wave Technology, ICMMT 2023

作者： Zhang, Zi-Wen Du, Chao-Hai Lei, Yu-Lu Zhu, Juan-Feng Zhu, Yu Li, Fan-Hong Shi-Pan Peking University Center for Carbon-Based Electronics State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics China

ISBN: (纸本)9798350338874

The vortex Smith-Purcell radiation with topological charge (TC) of 0 and -2 is proposed based on spoof surface plasmons (SSPs) carrying orbital angular momentums (OAMs) in this work. Due to the chirality of the helical grating, their eigenmodes are a series of SSPs carrying OAMs concerning the harmonic order. By customizing the slot depths over two propagation periods, these SSPs are exposed to the light cone. When the swift electrons skim over the grating and the wavenumber-matching conditions are met between the electron and SSPs carry ±1h, the vortex beams with TCs = 0 and -2 are emitted into the free space with broadband tunability. The proposed method and validation may prompt the development of mode-division multiplexed communications and chiral detections based on vortex beams. © 2023 IEEE.

关键词： Vortex flow

来源：评论

学校读者我要写书评

暂无评论

A Random Amplitude Modulated Continuous Wave Lidar system Based on Lens-assisted Beam Steering for Ranging and Velocimetry

A Random Amplitude Modulated Continuous Wave Lidar System Ba...

引用

2023 Opto-Electronics and Communications Conference, OECC 2023

作者： Cao, Xianyi Long, Jiaxuan Wu, Kan Li, Tianyi Chen, Jianping Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai China

A non-coaxial Lidar system based on lens-assisted beam-steering technology is demonstrated. A coherent random amplitude modulated continuous wave detection method is applied in the Lidar system to enable the capabilit... 详细信息

ISBN: (纸本)9781665462136

关键词： optical radar

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：