检索结果-内蒙古大学图书馆

Preface:special topic on novel optoelectronic devices

National Science Open 2022年第3期1卷 139-141页

作者： Ming Li Xuhan Guo State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The research and development(R&D)in silicon or III/V photonics are booming and emerging as the mainstream platforms for large-scale photonic integration circuits,which offer the well-established advantages of scalable chip-wise integration with low cost at high volume and high yield,following the standard complementary metal oxide semiconductor fabrication processes in the microelectronics ***,the co-integration of electronics with photonics is critical for fully exploiting the high bandwidth,reducing power consumption,as well as achieving more compact footprint and lower *** devices with novel co-integration schemes and new materials with further improved functionalities are urgently needed to push beyond the limitations posed by the intrinsic material capabilities and speed restrictions at the electro-optical ***,considerable breakthroughs revived our understanding of these fields,providing both opportunities and challenges in this exciting area.

关键词： optoelectronic integration breakthrough

来源：评论

学校读者我要写书评

暂无评论

Simultaneous Generation of Quantum Frequency Combs across Distinct Modal Families in a Single Silicon Nitride Whispering Gallery Mode Resonator

arXiv

引用

arXiv 2024年

作者： Ji, Bo Yang, Yongjun Wu, Tengfei Li, Nianqin He, Guangqiang State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology Measurement Aviation Industry Corporation of China Beijing100095 China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai200062 China

Quantum frequency combs (QFCs) are versatile resources for multi-mode entanglement, such as cluster states, crucial for quantum communication and computation. On-chip whispering gallery mode resonators (WGMRs) can generate these states at ultra-low threshold power. This work demonstrates the simultaneous generation of multiple QFCs using a single on-chip silicon nitride WGMR across distinct modal families. It presents a micro-ring resonator with a radius of 240 µm, capable of supporting four modal families within the 130 to 260 THz frequency range for consistency regulation. The results indicate that, by carefully designing the structure of silicon nitride WGMRs, it is possible to generate quantum entangled frequency combs across distinct modal families simultaneously using monochromatic pump light. It is achieved by modulating the pump mode profiles with a spatial light modulator (SLM) or an on-chip inverse-designed mode converter. This approach offers a simple and low-cost method to achieve higher-density entanglement integration on-chip. Copyright © 2024, The Authors. All rights reserved.

关键词： Silicon nitride

来源：评论

学校读者我要写书评

暂无评论

Atomic transport dynamics in crossed optical dipole trap

arXiv

引用

arXiv 2024年

作者： Peng, Peng Zhang, Zhengxi Fan, Yaoyuan Yin, Guoling Mao, Dekai Chen, Xuzong Xiong, Wei Zhou, Xiaoji State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Peking University Beijing100871 China Institute of Carbon-based Thin Film Electronics Peking University Taiyuan Shanxi030012 China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-Electronics Shanxi University Taiyuan030006 China

We study the dynamical evolution of cold atoms in crossed optical dipole trap theoretically and experimentally. The atomic transport process is accompanied by two competitive kinds of physical mechanics, atomic loading and atomic loss. The loading process normally is negligible in the evaporative cooling experiment on the ground, while it is significant in the preparation of ultra-cold atoms in the space station. Normally, the atomic loading process is much weaker than the atomic loss process, and the atomic number in the center region of the trap decreases monotonically, as reported in previous research. However, when the atomic loading process is comparable to the atomic loss process, the atomic number in the center region of the trap will initially increase to a maximum value and then slowly decrease, and we have observed the phenomenon first. The increase of atomic number in the center region of the trap shows the presence of the loading process, and this will be significant especially under microgravity conditions. We build a theoretical model to analyze the competitive relationship, which coincides with the experimental results well. Furthermore, we have also given the predicted evolutionary behaviors under different conditions. This research provides a solid foundation for further understanding of the atomic transport process in traps. The analysis of loading process is of significant importance for the preparation of ultra-cold atoms in a crossed optical dipole trap under microgravity conditions. © 2024, CC BY.

关键词： Space stations

来源：评论

学校读者我要写书评

暂无评论

A 15-user quantum secure direct communication network

引用

Light(Science & Applications) 2021年第12期10卷 2322-2329页

作者： Zhantong Qi Yuanhua Li Yiwen Huang Juan Feng Yuanlin Zheng Xianfeng Chen State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong University200240 ShanghaiChina Department of Physics Jiangxi Normal University330022 NanchangChina Shanghai Research Center for Quantum Sciences 201315 ShanghaiChina Collaborative Innovation Center of Light Manipulation and Applications Shandong Normal University250358 JinanChina

Quantum secure direct communication(QSDC)based on entanglement can directly transmit confidential ***,the inability to simultaneously distinguish the four sets of encoded entangled states limits its practical ***,we explore a QSDC network based on time–energy entanglement and sum-frequency *** total,15 users are in a fully connected QSDC network,and the fidelity of the entangled state shared by any two users is>97%.The results show that when any two users are performing QSDC over 40 km of optical fiber,the fidelity of the entangled state shared by them is still>95%,and the rate of information transmission can be maintained above 1 Kbp/*** result demonstrates the feasibility of a proposed QSDC network and hence lays the foundation for the realization of satellite-based long-distance and global QSDC in the future.

关键词： quantum hence realization

来源：评论

学校读者我要写书评

暂无评论

Scalable and Compact Silicon Mode Multiplexer via Tilt Waveguide Junctions with Shallow Etched Slots

Scalable and Compact Silicon Mode Multiplexer via Tilt Waveg...

引用

2021 Asia communications and Photonics Conference, ACP 2021

作者： Guo, Xiaoyuan Liu, Yingjie Zhong, Zhongqiu Du, Jiangbing Xu, Ke Dept. Electronic Information Engineering Harbin Institute of Technology Shenzhen518055 China State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China

A scalable mode (de)multiplexer is proposed using tilt waveguide junctions with shallow-etched slots. The designed four-mode (de)multiplexer with a 50×2 μm2 footprint has © Optica Publishing Group 2021

ISBN: (纸本)9781957171005

关键词： Multiplexing equipment

来源：评论

学校读者我要写书评

暂无评论

Ultra-Compact Multi-Mode Converter for optical Delay Line Application 19

Ultra-Compact Multi-Mode Converter for Optical Delay Line Ap...

引用

19th International Conference on optical communications and networks, ICOCN 2021

作者： Wang, Ningning Yang, Xing Wu, Di Lu, Liangjun Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China

ISBN: (纸本)9781665424462

optical delay lines (ODL) are one of the key components in integrated photonic circuits and systems. We propose a novel optical delay line structure based on multimode conversion. The silicon multi-mode converter is optimized via an inverse design method to simultaneously convert the TEi modes to TEi+1 modes (i =1, 2, and 3) at the wavelength of 1550 nm. It only occupies an area of 4 µm × 3 µm. Simulation results show that the insertion loss of the mode-order converter is less than 1.6 dB and the crosstalk is lower than −22 dB for all three modes. © 2021 IEEE.

关键词： Silicon photonics

来源：评论

学校读者我要写书评

暂无评论

Efficient frame synchronization using a weak coherent state for continuous-variable quantum key distribution

引用

Physical Review A 2022年第5期105卷 052407-052407页

作者： Jing Dong Tao Wang Lang Li Peng Huang 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 Shanghai Research Center for Quantum Sciences Shanghai 201315 China

Frame synchronization is a crucial step in quantum key distribution (QKD) and a prerequisite for secure key distillation. Due to the extremely low signal-to-noise ratio (SNR) and fast phase drift in the continuous-variable QKD system, efficient frame synchronization is highly demanded. In this paper, a frame-synchronization scheme based on weak coherent states is proposed. This scheme uses a train of coherent-state pulses encoded by a Zadoff-Chu sequence to achieve frame synchronization. The synchronization performance is analyzed under different transmission distances, transmit powers, frequency offsets, and phase drifts through Monte Carlo simulation. Its performance is also compared with other synchronization sequences, confirming its noise-tolerance capability. An optical experiment is conducted to verify the feasibility of the synchronization scheme under low SNR (as low as −20 dB), and the applicable SNR range can be further reduced by increasing the sequence length. Due to its efficiency and noise tolerance, this scheme can provide technical support for weak-coherent-state-based QKD and future quantum network construction.

关键词： Quantum communication Quantum cryptography Quantum information processing with continuous variables

来源：评论

学校读者我要写书评

暂无评论

320Gb/s Nyquist-shaped Twin SSB 16-QAM Signal Transmission over 80km SSMF with a Silicon IQ Modulator

320Gb/s Nyquist-shaped Twin SSB 16-QAM Signal Transmission o...

引用

optical Fiber communication (OFC) Conference

作者： Fan Yang Lei Zhang Xinyu Chen Xiansong Fang Chenjia Li Fan Zhang State Key Laboratory of Advanced Optical Communication System and Networks Frontiers Science Center for Nano-Optoelectronics Peking University Beijing

We experimentally demonstrate ultrahigh speed metro-haul optical transmission of twin SSB 16-QAM signal with a Silicon IQ modulator. A 320Gb/s data rate over 80km SSMF is achieved with a BER below the 20% SD-FEC thres... 详细信息

ISBN: (纸本)9781943580866

关键词： optical fibers Wavelength measurement Amplitude modulation Silicon optical fiber communication optical modulation Next generation networking

来源：评论

学校读者我要写书评

暂无评论

A Low Self-Noise Fiber Optic Gyroscope Based on Dual-polarization Configuration for Geophysical Rotation Sensing

A Low Self-Noise Fiber Optic Gyroscope Based on Dual-polariz...

引用

2021 Asia communications and Photonics Conference, ACP 2021

作者： Chen, Yanjun Cao, Yuwen Wang, Wenbo He, Yan Zhou, Tong Li, Zhengbin State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Beijing100871 China School of Software and Microelectronics Peking University Beijing102600 China

A fiber optic gyroscope based on dual-polarization configuration_is designed and realized. The 24-hour stability test shows aself-noise level of 3 × 10−9 rad/s/√Hz within the frequency range of 0.001Hz to 1Hz. &... 详细信息

ISBN: (纸本)9781957171005

关键词： Gyroscopes

来源：评论

学校读者我要写书评

暂无评论

WiFi-Diffusion: Achieving Fine-Grained WiFi Radio Map Estimation with Ultra-Low Sampling Rate by Diffusion Models

arXiv

引用

arXiv 2025年

作者： Liu, Zhiyuan Zhang, Shuhang Liu, Qingyu Zhang, Hongliang Song, Lingyang School of Electronic and Computer Engineering Peking University Shenzhen Graduate School Shenzhen518055 China Pengcheng Laboratory Shenzhen518055 China Department of Electronics Peking University Beijing100871 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China

Fine-grained radio map presents communication parameters of interest, e.g., received signal strength, at every point across a large geographical region. It can be leveraged to improve the efficiency of spectrum utilization for a large area, particularly critical for the unlicensed WiFi spectrum. The problem of fine-grained radio map estimation is to utilize radio samples collected by sparsely distributed sensors to infer the map. This problem is challenging due to the ultra-low sampling rate, where the number of available samples is far less than the fine-grained resolution required for radio map estimation. We propose WiFi-Diffusion – a novel generative framework for achieving fine-grained WiFi radio map estimation using diffusion models. WiFi-Diffusion employs the creative power of generative AI to address the ultra-low sampling rate challenge and consists of three blocks: 1) a boost block, using prior information such as the layout of obstacles to optimize the diffusion model;2) a generation block, leveraging the diffusion model to generate a candidate set of radio maps;and 3) an election block, utilizing the radio propagation model as a guide to find the best radio map from the candidate set. Extensive simulations demonstrate that 1) the fine-grained radio map generated by WiFi-Diffusion is ten times better than those produced by state-of-the-art (SOTA) when they use the same ultra-low sampling rate;and 2) WiFi-Diffusion achieves comparable fine-grained radio map quality with only one-fifth of the sampling rate required by SOTA. Copyright © 2025, The Authors. All rights reserved.

关键词： Wi-Fi

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：