检索结果-内蒙古大学图书馆

Temporal-spectral correlation dynamics of Raman random fiber laser

Science China(Information Sciences) 2025年第4期68卷 166-176页

作者： Longqun NI Yifei QI Xingyu BAO Jing ZHANG Pan WANG Han WU Zinan WANG Key Laboratory of Optical Fiber Sensing and Communications University of Electronic Science and Technology of China College of Electronics and Information Engineering Sichuan University

Raman random fiber laser(RRFL) possesses rich physical properties of spectral, temporal, and spatial domains due to its unique feedback mechanism and complex nonlinear effects. Characterizing and controlling the microscopic evolution dynamics of RRFL are crucial to driving breakthrough advances in fields such as inertial confinement fusion and fundamental physics. In this work, a novel experimental and theoretical analysis of the evolution of the temporal spectral correlations of the RRFL in the transition and steady states is conducted. In the transitional state, the microscopic dynamics of the RRFL excitation process is revealed comprehensively: the temporal-correlation growth curve contrasts with that of resonant-cavity lasers, and the formation and degradation of spectral correlation are observed. In the steady state, the overall spectrum is characterized by partial correlation, and the correlation characteristics of RRFL mainly originate from the spectral random spikes, which offers a novel dimension for the precise control of RRFL correlation. This work provides new insights into underlying physical properties of continuous broadband lasers, offering key guidance for laser design, control, and applications.

关键词： random fiber laser microscopic characteristics temporal-spectral correlation random spikes nonlinear optics

来源：评论

学校读者我要写书评

暂无评论

Quantum attack on RSA by D-Wave Advantage:a first break of 80-bit RSA

引用

Science China(Information Sciences) 2025年第2期68卷 397-398页

作者： Chunlei HONG Zhi PEI Qidi WANG Shuxiao YANG Jingjing YU Chao WANG School of Communication and Information Engineering Shanghai University Key Laboratory of Specialty Fiber Optics and Optical Access Networks

RSA [1], a cryptographic system essential for securing network communications, relies on the difficulty of factorizing an integer into two primes(factorizing an integer N = P ×Q,where P and Q are prime numbers). In theory, quantum computers can factorize RSA integers in polynomial ***, under the current limitations of quantum hardware, the practical ability of quantum algorithms to attack RSA remains unsatisfactory. In this study, we combine the advantages of quantum and classical computing, employing a hybrid architecture of quantum computing and classical algorithms to attack RSA.

关键词： Factorization

来源：评论

学校读者我要写书评

暂无评论

Generalized snapshot spectral imaging across different illuminants with wavelength-phase joint coding

引用

Optics Express 2025年第6期33卷 13695-13708页

作者： Zhuge, Zhengyue Xu, Hao Xu, Jiahui Xu, Zhihai Li, Qi Chen, Yueting State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and Engineering Zhejiang University China

Snapshot spectral imaging has been an active area of research and has attracted significant attention. However, few studies have considered the diversity of light sources, leading to overfitting on specific types of illuminants. In this paper, we propose an illuminant augmentation method to improve the generalization ability. The color filter arrays (CFAs) of RGB cameras can encode wavelength information to colors but meet metamerism. To tackle this issue, we further optimize a diffractive optics element (DOE) for phase coding in an end-to-end manner. We build a phase-wavelength joint coding compressive imaging system that shows better generalization ability than a conventional RGB camera. To enhance the spectral reconstruction performance, we introduce a novel mamba-based network, snapshot spectral compressive imaging mamba (SSCIM). Additionally, we have collected a well-calibrated hyperspectral dataset of relative reflectance for testing. Experimental results demonstrate that our method achieves state-of-the-art performance in hyperspectral reconstruction and illuminant generalization. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Image coding

来源：评论

学校读者我要写书评

暂无评论

Enhancement Methods for Chiral optical Signals by Tailoring optical Fields and Nanostructures

引用

engineering 2025年第2期45卷 25-43页

作者： Hanqing Cai Liangliang Gu Haifeng Hu Qiwen Zhan School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Zhangjiang Laboratory Shanghai 201204China Shanghai Key Laboratory of Modern Optical System University of Shanghai for Science and TechnologyShanghai 200093China

The unique property of chirality is widely used in various *** the past few decades,a great deal of research has been conducted on the interactions between light and matter,resulting in significant technical advancements in the precise manipulation of light field *** this review,which focuses on current chiral optics research,we introduce the fundamental theory of chirality and highlight the latest achievements in enhancing chiral signals through artificial nano-manufacturing technology,with a particular focus on mechanisms such as light scattering and Mie resonance used to amplify chiral *** providing an overview of enhanced chiral signals,this review aims to provide researchers with an indepth understanding of chiral phenomena and its versatile applications in various domains.

关键词： Mie scattering optical chirality Circular dichroism Orbital angular momentum Bound states in the continuum Nonlinear optics

来源：评论

学校读者我要写书评

暂无评论

Interfacial coupling enables high carrier mobility in PbS colloidal quantum dot photodetectors

引用

Nano Research 2025年第3期18卷 619-630页

作者： Qing Li Lier Deng Yuxuan Du Shasha Chang Shuai Wen Rui Qin Jiuhong Wang Wenzhi Feng Boao Gu Huan Liu Key Laboratory of the Ministry of Education&Thin Film and Optical Manufacturing Technology School of Opto-Electronic EngineeringXi'an Technological UniversityXi'an 710021China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China

Carrier transport in colloidal quantum dot(CQD)films is strongly influenced by the interfacial coupling between ***,the shape of PbS CQDs synthesized using traditional methods results in random orientation relationships between the crystal facets in CQD films,limiting the coupling strength and the final performance of optoelectronic *** this study,post-synthesis surface treatment of PbS CQDs was employed to achieve facet control during secondary growth,manipulating the facets of PbS CQDs at the nanoscale to enhance interfacial coupling within CQD ***,mixed ligands of PbX_(2)(X=Br,I)and anhydrous sodium acetate were used to passivate the PbS CQDs,ensuring sufficient *** method combines facet passivation with strong coupling through the(100)facets of CQDs,thereby enhancing carrier mobility and improving device *** results showed that,compared to standard PbS CQD films,the electron and hole mobilities of the PbS CQD films subjected to secondary growth were significantly improved,with hole mobility increased by 6 *** fabricated using these films achieved a quantum efficiency of 33%at 1500 nm under 0 V bias,a threefold improvement compared to standard devices.

关键词： interfacial coupling carrier mobility liquid-phase atomic layer deposition liquid-phase ligand exchange PbS colloidal quantum dot photodetectors

来源：评论

学校读者我要写书评

暂无评论

In situ fiber-optic detection of photocorrosion in electrochemically grown CuO photocathodes

引用

Photonics Research 2025年第3期13卷 561-571页

作者： TIANSHENG HUANG TONGYU WU QI FANG GUANGZHENG LUO LI-PENG SUN BAI-OU GUAN Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications Institute of Photonics Technology Jinan University College of Physics & Optoelectronic Engineering Jinan University

Semiconductor metal oxides with narrow bandgap have emerged as a promising platform for photoelectrochemical reactions, yet their photoelectron-induced photocorrosion effect has been a limitation for their wider applications. Understanding the conversion processes concomitant with photoelectrochemical reaction at the electrode–electrolyte interface plays a crucial role in revealing the corrosion mechanisms and advancing the development of efficient photocathodes. However, accurately and in situ tracking these dynamic chemical events remains a great challenge due to the fact that reaction processes occur at nanoscale interfaces. Here, we track the electrochemical growth and conversion of copper nanostructures at interface by the evanescent field of the surface plasmon wave by using a gold-coated optical fiber as an electrochemical electrode and light sensing probe. The results exhibit correlation between redox processes of copper species and plasmonic resonances. Furthermore,in situ fiber-optic detection reveals the photocorrosion dynamics under photoelectrochemical reaction, including photoelectron-induced self-reduction of copper oxide and self-oxidation of cuprous oxide. These demonstrations facilitate not only the diagnosis for the health condition of photocathode nanomaterial, but also the understanding of the underlying reaction mechanism, and thus are potentially crucial for advancing the development of highly efficient photocathodes in future energy applications.

关键词： Absorption coefficient Indium tin oxide optical materials Scanning electron microscopy Silica fibers Surface waves

来源：评论

学校读者我要写书评

暂无评论

Flexible, Super-stable, and Multifunctional Capacitive Pressure Sensors with Tilted Micropillar Array by Inclined Laser Ablation and Demolding

引用

IEEE Sensors Journal 2025年第6期25卷 9367-9374页

作者： Xu, Tianlong Li, Kaixin Zhou, Yihao Zhang, Dawei Sheng, Bin College of Optical Electrical and Computer Engineering Unversity of Shanghai for Science and Technology Shanghai 200093 China. Shanghai Key Laboratory of Modern Optical Systems Engineering Research Center of Optical Instruments and System Shanghai 200093 China

Flexible capacitive pressure sensors have garnered considerable interest across diverse applications, including medical monitoring, electronic skin, and robotic tactile systems, owing to their straightforward fabrication process, low energy consumption, and robust stability. In this paper, we introduce a new inclined laser ablation (ILA) combined with demolding technique for the fabrication of flexible capacitive sensors featuring a microstructured dielectric layer composed of a tilted micropillar array (TMA). The design parameters of TMA were systematically optimized, including the tilt angle of the micropillars, array gap, aspect ratio, and bottom film thickness. The resulting capacitive pressure sensor, equipped with 75° tilted micropillar arrays (aspect ratio of 5:1), demonstrates exceptional sensitivity (1.12 kPa-1) within the low-pressure range (0-2 kPa), rapid response and recovery times, a low pressure detection limit of 0.25 Pa, and transient response stability factor as high as 243.9. The proposed capacitive pressure sensor was validated for the detection and recognition of human motions when attached to various body parts. Additionally, the sensors also demonstrated significant potential for diverse applications, including tactile sensing, and Morse code communication. © 2025 IEEE.

关键词： Aspect ratio

来源：评论

学校读者我要写书评

暂无评论

Successive Optimization of Optics and Post-processing with Differentiable Coherent PSF Operator and Field Information

IEEE Transactions on Computational Imaging

引用

IEEE Transactions on Computational Imaging 2025年 11卷 599-608页

作者： Ren, Zheng Zhou, Jingwen Zhang, Wenguan Yan, Jiapu Chen, Bingkun Feng, Huajun Chen, Shiqi Zhejiang University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and Engineering Hangzhou310027 China

Recently, the joint design of optical systems and downstream algorithms is showing significant potential. However, existing rays-described methods are limited to optimizing geometric degradation, making it difficult to fully represent the optical characteristics of complex, miniaturized lenses constrained by wavefront aberration or diffraction effects. In this work, we introduce a precise optical simulation model, and every operation in pipeline is differentiable. This model employs a novel initial value strategy to enhance the reliability of intersection calculation on high aspherics. Moreover, it utilizes a differential operator to reduce memory consumption during coherent point spread function calculations. To efficiently address various degradation, we design a joint optimization procedure that leverages field information. Guided by a general restoration network, the proposed method not only enhances the image quality, but also successively improves the optical performance across multiple lenses that are already in professional level. This joint optimization pipeline offers innovative insights into the practical design of sophisticated optical systems and post-processing algorithms. © 2015 IEEE.

关键词： optical transfer function

来源：评论

学校读者我要写书评

暂无评论

Fast sensitivity control method with differentiable optics

引用

Optics Express 2025年第6期33卷 14404-14418页

作者： Ren, Zheng Zhang, Wenguan Jiang, Tingting Li, Shuyi Feng, Huajun State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and Engineering Zhejiang University Hangzhou310027 China

Differentiable optics integrates optical design with image processing, enabling joint optimization of optical systems and neural networks through task-specific evaluation metrics. However, controlling lens tolerance sensitivity during optimization remains an unresolved challenge, often resulting in significant performance degradation due to manufacturing and assembly tolerances. In this work, we propose a fast sensitivity control method tailored for different optical models. Our approach addresses sensitivity from three key aspects: tolerance sensitivity, uniformity of tolerance degradation, and symmetry of tolerance boundaries. Using the wavefront-focusing method, we enhance optimization stability by compensating for defocus and focusing the evaluation on the optimal image plane. Additionally, the optical path differential method eliminates the need for repeated ray tracing of perturbed systems, significantly reducing computational costs. Experimental results with two advanced smartphone lenses, a wide-angle and a telephoto lens, validate the effectiveness of our method. This work provides a practical solution for desensitization optimization in differentiable optics, offering new possibilities for optical desensitization and joint design in computational imaging tasks. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Ray tracing

来源：评论

学校读者我要写书评

暂无评论

An error-based observer improved by the repetitive control strategy for electro-optical tracking systems

引用

Frontiers of Information Technology & Electronic engineering 2025年第3期26卷 441-455页

作者： Mai TANG Wenqiang XIA Jiuqiang DENG Yao MAO National Key Laboratory of Optical Field Manipulation Science and Technology Chinese Academy of SciencesChengdu 610209China Key Laboratory of Optical Engineering Chinese Academy of SciencesChengdu 610209China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China University of Chinese Academy of Sciences Beijing 101408China

Electro-optical tracking systems have been widely used in the cutting-edge domains of free space environment detection and communication owing to their exceptional ***,external disturbances often significantly impact the working accuracy of these *** their scope of application continues to broaden,increasingly complex operating conditions introduce more intricate environments and *** paper introduces a composite control structure of an enhanced error-based observer,rooted in the repetitive control strategy,tailored for two types of complex disturbances:periodic harmonic disturbance and narrow-band peak periodic *** structure not only ensures the system's stability,but also suppresses periodic disturbances across multiple frequencies,effectively addressing the challenge that current disturbance suppression methods face in mitigating complex periodic ***,necessary proofs are provided and an experimental platform is established for the electro-optical system,demonstrating the efficacy and reliability of the proposed control methods under various conditions.

关键词： Disturbance suppression Error-based observer Repetitive control Electro-optical tracking system Specific frequency point

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：