检索结果-内蒙古大学图书馆

4th International Computational Imaging Conference, CITA 2024

作者： Zhang, Beibei Li, Lang Xu, Yuehan Wang, Tao Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai200240 China

ISBN: (纸本)9781510688834

QRNGs, which leverage quantum mechanical principles to generate random numbers, are widely utilized in information security and cryptography. This paper reviews various QRNG systems and their evolution, with a particular focus on the simple and efficient CMOS-based QRNG system. However, while current random number generation methods ensure randomness, they do not guarantee the security of the generated random numbers, especially in encryption applications. The results demonstrate that an attacker can manipulate the light source to inject attack signals, leading to an increase in the entropy value calculated by legitimate users. This allows the attacker to extract additional entropy information. Notably, the compromised random numbers still pass the NIST randomness tests, indicating a fundamental breach of the system's security. This paper proposes strategies for identifying and defending against such potential attacks, with the aim of enhancing the reliability and security of QRNG systems. © 2025 SPIE.

关键词： CMOS integrated circuits

来源：评论

学校读者我要写书评

暂无评论

Performance assessment of octagonal layout based integrated photonic reservoir computing for optical channel equalization

引用

Optics Express 2025年第7期33卷 15814-15826页

作者： Zuo, Xiaoyan Pei, Li Bai, Bing Bai, Bowen Hu, Zhouyi Wang, Jianshuai Qu, Qi Dong, Fei Institute of Lightwave Technology Beijing Jiaotong University Ministry of Education Key Laboratory of All-Optical Networks and Modern Communication Networks Beijing100044 China Technology Co. Ltd. China State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Peking University Beijing100871 China Beijing Aerospace Institute for Metrology and Measurement Technology Beijing100076 China

Compared to electronic equalizers, the equalizers based on integrated photonic reservoir computing exhibit the advantages of large bandwidth, short latency, and low power consumption. The existing rectangular reservoir layout employs internal nodes as input and output nodes, leading to inadequate signal exchange and extra noise due to waveguide crossing. We proposed an optical channel equalizer based on an octagonal reservoir layout and verified its equalization ability. The system-level simulation of the proposed layout is conducted to investigate the impact of layout shape, node quantity, input and output port number, and weight algorithm on channel equalization performance in a 25Gbaud 4-level pulse amplitude modulation optical communication system. Results indicate that, within a transmission distance of 5-30 km, the bit error rate (BER) of the equalized signal in the proposed octagonal layout is lower than that of a rectangular layout with the same number of nodes. Specifically, at 5 km, the octagonal layout’s BER is 5 and 10 orders of magnitude lower than the rectangular layout and the feedforward equalizer, respectively. Meanwhile, the best readout algorithm, K-nearest neighbor regression, achieves an equalized BER of 7.012 × 10−14 © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse amplitude modulation

来源：评论

学校读者我要写书评

暂无评论

An adjustment-free laser resonator based on micron-scale corner cube array

引用

Chinese Physics B 2025年第3期34卷 382-387页

作者： Pengyuan Chang Xinrong Huang Caolei Fu Aiping Liu Duo Pan Zhiyang Wang Jingbiao Chen Institute of Quantum Information and Technology Nanjing University of Posts and TelecommunicationsNanjing 210003China State Key Laboratory of Advanced Optical Communication Systems and Networks Institute of Quantum ElectronicsSchool of ElectronicsPeking UniversityBeijing 100087China Hefei National Laboratory Hefei 230088China

The topic of improving the mechanical stability of external cavity diode lasers(ECDLs)has recently attracted widespread attention and *** use of corner-cube-array(CCA)-based resonators provides a potential solution for this purpose,although continuous oscillation at super large incident angle remains *** this work,we employ the CCA resonator to generate continuous oscillation within±20°angular misalignment of cavity mirror in *** the basis of retroreflection theory,the retroreflectivity of a CCA is analyzed by using optical simulation ***,the experiment verifies the advantage of using a CCA over a plane mirror in laser resonator,thereby providing a promising approach for *** threshold characteristic curves measured at different incident angles in the experiment verify that the CCA possesses an obvious anti-angle misalignment *** research introduces an alternative solution of using CCA resonator instead of parallel plane cavity,thereby realizing an adjustment-free ECDL with enhanced mechanical stability.

关键词： laser resonant cavity corner cube array external cavity diode laser threshold curve

来源：评论

学校读者我要写书评

暂无评论

273.6 Tbit/s real-time S + C + L-band same-wavelength bidirectional wavelength division multiplexing transmission in anti-resonant hollow-core fiber

引用

Optics Letters 2025年第3期50卷 884-887页

作者： Zhang, Xu Wang, Yaqin Wu, Yan Luo, Ming He, Qingyu Qiu, Ying Luan, Yancai Yu, Wenhai Du, Ping Li, Chao He, Zhixue Ding, Wei Xiao, Xi Li, Hanbing Yu, Shaohua State Key Laboratory of Optical Communication Technologies and Networks China Information Communication Technologies Group Corporation Wuhan430074 China Pengcheng Laboratory Shenzhen518000 China Fiberhome Telecommunication Technologies Co. Ltd. Wuhan430074 China College of Physics & Optoelectronic Engineering Jinan University Guangzhou510632 China National Optoelectronics Innovation Center Hubei Wuhan430074 China

Based on its ultra-low backscattering characteristic, anti-resonant hollow-core fiber is a good medium for bidirectional transmission, which means that the wavelengths of the transmission channels are the same in both directions. In this Letter, we present the first, to the best of our knowledge, demonstration of S + C + L-band same-wavelength bidirectional transmission in an anti-resonant hollow-core fiber. By using a commercial real-time coherent optical transceivers and amplified spontaneous emission (ASE) source, a total net throughput of 273.6 Tbit/s is achieved over 1.4 km nested anti-resonant nodeless fiber (NANF) with 19.65 THz bandwidth and bidirectional wavelength division multiplexing (WDM) transmission. Commercial 400 G, 1 T, and 800 G optical modules are employed in the S-band, C-band, and L-band, respectively. We experimentally evaluate the same-wavelength bidirectional WDM transmission performance by verifying 2 × 102 channels of 68 Gbaud probabilistically constellation-shaped (PCS) 16 quadrature amplitude modulation (QAM) in the S-band with 75 GHz grid, 2 × 48 channels of 118 Gbaud PCS-64QAM in a C-band with 125 GHz grid and 2 × 60 channels of 91.6 Gbaud PCS-64QAM in the L-band with 100 GHz grid. All 420 test channels could satisfy the bit error ratio (BER) requirements. The result shows great potential for same-wavelength bidirectional WDM transmission in an anti-resonant hollow-core fiber. © 2025 Optica Publishing Group. All rights.

关键词： Quadrature amplitude modulation

来源：评论

学校读者我要写书评

暂无评论

Electromagnetic metamaterial agent

引用

Light(Science & Applications) 2025年第1期14卷 118-130页

作者： Shengguo Hu Mingyi Li Jiawen Xu Hongrui Zhang Shanghang Zhang Tie Jun Cui Philipp del Hougne Lianlin Li State Key Laboratory of Advanced Optical Communication Systems and Networks School of ElectronicsPeking UniversityBeijing100871China National Key Laboratory for Multimedia Information Processing School of Computer SciencePeking UniversityBeijing100871China State Key Laboratory of Millimeter Waves Southeast UniversityNanjing210096China Pazhou Laboratory(Huangpu) GuangzhouGuangdong510555China Univ Rennes CNRSIETR-UMR 6164F-35000RennesFrance

Metamaterials have revolutionized wave control;in the last two decades,they evolved from passive devices via programmable devices to sensor-endowed self-adaptive devices realizing a user-specified *** deep-learning techniques play an increasingly important role in metamaterial inverse design,measurement post-processing and end-to-end optimization,their role is ultimately still limited to approximating specific mathematical relations;the metamaterial is still limited to serving as proxy of a human operator,realizing a predefined ***,we propose and experimentally prototype a paradigm shift toward a metamaterial agent(coined metaAgent)endowed with reasoning and cognitive capabilities enabling the autonomous planning and successful execution of diverse long-horizon tasks,including electromagnetic(EM)field manipulations and interactions with robots and *** recently released foundation models,metaAgent reasons in high-level natural language,acting upon diverse prompts from an evolving complex ***,metaAgent's cerebrum performs high-level task planning in natural language via a multi-agent discussion mechanism,where agents are domain experts in sensing,planning,grounding,and *** response to live environmental feedback within a real-world setting emulating an ambient-assisted living context(including human requests in natural language),our metaAgent prototype self-organizes a hierarchy of EM manipulation tasks in conjunction with commanding a *** masters foundational EM manipulation skills related to wireless communications and sensing,and it memorizes and learns from past experience based on human feedback.

关键词： agent prompt reasoning

来源：评论

学校读者我要写书评

暂无评论

Chip-scale integrated optical gyroscope based on a multi-mode co-detection technique

引用

Photonics Research 2025年第2期13卷 319-329页

作者： SHUANG LIU JUNYI HU BINJIE LI BOYI XUE WENJIE WAN HUILIAN MA ZUYUAN HE School of Aeronautics and Astronautics Zhejiang University State Key Laboratory of Advanced Optical Communication Systems and Networks University of Michigan-Shanghai Jiao Tong University Joint InstituteShanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

Gyroscopes are crucial components of inertial navigation systems, with ongoing development emphasizing miniaturization and enhanced accuracy. The recent advances in chip-scale optical gyroscopes utilizing integrated optics have attracted considerable attention, demonstrating significant advantages in achieving tactical-grade *** this paper, a new, to our knowledge, integrated optical gyroscope scheme based on the multi-mode co-detection technology is proposed, which takes the high-Q microcavity as its core sensitive element and uses the multi-mode characteristics of the microcavity to achieve the measurement of rotational angular velocity. This detection scheme breaks the tradition of optical gyroscopes based on a single mode within the sensitive ring to detect the angular rotation rate, which not only greatly simplifies the optical and electrical system of the optical gyroscope, but also has a higher detection accuracy. The gyroscope based on this detection scheme has successfully detected the Earth's rotation on a 9.2 mm diameter microcavity with a bias instability as low as 1 deg/h, which is the best performance among the chip-scale integrated optical gyroscopes known to us.

关键词： Effective refractive index Fiber optic gyroscopes Integrated optics Kerr effect optical systems Phase shift

来源：评论

学校读者我要写书评

暂无评论

Imaging through Scattering Media via Optronic Convolutional Neural Network 4

Imaging through Scattering Media via Optronic Convolutional ...

引用

4th International Computational Imaging Conference, CITA 2024

作者： Tu, Luofei Huang, Zicheng Ma, Jiahui Guo, Zhishun Gao, Yesheng State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China

ISBN: (纸本)9781510688834

With the growing influence of machine learning, it brings benefits to the inverse problem of imaging through scattering media in computational imaging. This study introduces an innovative opto-electronic fully convolutional neural network (OP-FCNN) designed to enhance speckle reconstruction with reduced computational complexity. By integrating lens groups and spatial light modulators, the OP-FCNN performs essential functions like convolution and sampling in the optical domain, drastically lowering the computational demands compared to traditional digital methods. This approach not only improves imaging performance but also offers scalability and adaptability for various datasets. The findings indicate that the OP-FCNN represents a promising advancement toward efficient all-optical imaging systems through scattering media. © 2025 SPIE.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

TCN-based end-to-end optimization for IM-DD optical communication system 4

TCN-based end-to-end optimization for IM-DD optical communic...

引用

4th International Computational Imaging Conference, CITA 2024

作者： Zhang, Tianqian Liu, Wu Zhong, Zhiyi Li, Han Luo, Ming Liu, Shouyin National Key Laboratory of Optical Communication Technologies and Networks China Information and Communication Technologies Group Corporation Wuhan430200 China College of Physical Science and Technology Central China Normal University Wuhan430070 China

ISBN: (纸本)9781510688834

In recent years, machine learning has greatly impacted optical communication systems, with end-to-end learning becoming a key focus. Originating from wireless communications, this approach treats the transmitter, channel, and receiver as a single neural network, forming an auto-encoder for global optimization. In this study, we propose a Temporal Convolutional Network (TCN)-based end-to-end framework for intensity-modulation and direct-detection (IM-DD) optical communication systems, targeting the efficient transmission of 32 Gbaud PAM4 signals. The TCN captures the temporal dependencies of the optical channel, while a one-dimensional convolutional neural network (1D-CNN) optimizes signal encoding at the transmitter. At the receiver, a residual CNN (Res-CNN) mitigates noise and distortion. Our approach improves receiver sensitivity by 1.4 dB and 0.88 dB compared to the Volterra-DFE and feed-forward equalization (FFE) at the receiver coupled with 1D-CNN transmitter, demonstrating its potential for future robust optical communications. © 2025 SPIE.

关键词： Convolutional neural networks

来源：评论

学校读者我要写书评

暂无评论

Silicon 3D-integrated 2 × 2 × 106.25 Gbps parallel multimode transmitter

引用

Optics Letters 2025年第9期50卷 2888-2891页

作者： Ran, Shihuan Sun, Yao Miao, Ting Chu, Bohan Li, Yu Chen, Jianping Zhou, Linjie State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China

Mode division multiplexing (MDM) has garnered significant attention for its potential to enhance communication capacity. In this paper, we present for the first time, to the best of our knowledge, a 3D-integrated parallel multimode transmitter, featuring two multimode fibers, with both TE0 and TE1 modes transmitted for data multiplexing. Each channel exhibits an electro-optic (EO) bandwidth of ∼45 GHz, enabling a total transmission of 2 × 2 × 106.25 Gbps upon four-level pulse amplitude modulation (PAM-4). © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Fabrication-Tolerant High-Speed 5-Bit Silicon optical True Time Delay Line in the O-Band

引用

Journal of Lightwave Technology 2025年第9期43卷 4358-4366页

作者： Ni, Ziheng Lu, Liangjun Wang, Yixuan Liu, Yuanbin Chen, Jianping Zhou, Linjie Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Institute for Advanced Communication and Data Science Department of Electronic Engineering Shanghai Key Lab of Navigation and Location Services Shanghai200240 China SJTU-Pinghu Institute of Intelligent Optoelectronics Pinghu314200 China

Fast reconfiguration time on the order of nanoseconds is crucial for microwave photonic beamformers, particularly in 5G/6G wireless communication systems. Most previously reported integrated optical true time delay lines (OTTDLs) exhibit a slow response time of tens of microseconds. In this study, we demonstrate an O-band high-speed 5-bit silicon OTTDL based on fabrication-tolerant electro-optic push-pull optical switches, which exhibit lower phase deviation and reduced insertion loss compared to conventional designs. The rising and falling times are 9 ns and 11 ns for the electro-optic switching, respectively. The insertion loss and crosstalk of our fabrication-tolerant high-speed switch element are 0.66 dB (0.74 dB) and −25.09 dB (−27.41 dB) at the bar (cross) state, respectively, at the wavelength of 1310 nm. For the 5-bit OTTDL, the initial phase variation is only ∼0.10π, which is one-sixth of that observed in the conventional design. Additionally, our proposed OTTDL features a low fiber-to-fiber insertion loss of 8.72 dB and a delay tuning range of 0-313.9 ps. The high-performance, fabrication-tolerant OTTDLs hold significant promise for future applications in fast beamforming. © 1983-2012 IEEE.

关键词： Fiber to the x

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：