2024
2024
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Record 373 of
Title:A Three-State Space Modeling Method for Aircraft System Reliability Design
Author Full Names:Wang, Yao; Wang, Fengtao; Feng, Yue; Cao, ShanchengSource Title:MACHINESLanguage:EnglishDocument Type:ArticleKeywords Plus:FAULT-TREEAbstract:Reliability is an inherent attribute of a system through optimal system design. However, during the aircraft system development process, the reliability evaluation and system function design efforts are often disconnected, leading to a divide between reliability experts and system designers in their work schedule. This disconnect results in an inefficient aircraft system reliability optimization process, known as the two-skin phenomenon. To address this issue, a three-state space model is proposed. Firstly, an analysis was conducted on the relationship between the system function architecture developed by the system designers and the reliability evaluation performed by the reliability experts. Secondly, based on the principle of function flow, the state of failure was categorized into physical failure and non-physical failure. Additionally, a new state of function loss was introduced as the third state for the system, in addition to the traditional states of normal and faulty. Thirdly, through the state of Function loss, an effective integration of system fault modes and function modes was achieved, leading to an optimized system reliability model. A three-state space modeling method was then developed by transforming the system function architecture into a system reliability model. Finally, this new model was applied to an aircraft's rudder and fly-by-wire control system. The results demonstrate that the function architecture at the design stage of the system can be accurately transformed into the new three-state space model. The structure aligns closely with the function architecture and can be effectively utilized in quantitative system reliability calculations. In this way, the process of ensuring system reliability can be seamlessly integrated into the system optimization design process. This integration alleviates the issue of disjointed work between reliability experts and system designers, leading to a more streamlined and efficient aircraft system optimization process.Addresses:[Wang, Yao; Feng, Yue] Xian Univ Technol, Sch Mech & Precis Instrument Engn, Xian 710048, Peoples R China; [Wang, Fengtao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Cao, Shancheng] Northwestern Polytech Univ, Sch Aeronaut, Xian 710072, Peoples R ChinaAffiliations:Xi'an University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Northwestern Polytechnical UniversityPublication Year:2024Volume:12Issue:1Article Number:13DOI Link:http://dx.doi.org/10.3390/machines12010013数据库ID（收录号）:WOS:001151577800001 -
Record 374 of
Title:Strengthened Residual Graph and Multiscale Gated Guided Convolutional Fusion Network for Hyperspectral Change Detection
Author Full Names:Xu, Shufang; Xia, Xiangfei; Li, Haiwei; Zhang, Yiyan; Sheng, Runhua; Gao, Hongmin; Zhang, BingSource Title:IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSINGLanguage:EnglishDocument Type:ArticleKeywords Plus:IMAGE; CLASSIFICATION; TENSORAbstract:Hyperspectral image (HSI) change detection (CD) focuses on identifying changes in the internal components of land cover and land use. Convolutional neural networks (CNNs) have made significant progress in HSI-CD. Concurrently, graph convolutional networks (GCNs) have gained considerable attention for their ability to utilize unlabeled data and explicitly exploit correlations between adjacent parcels. However, CNNs are constrained by fixed, small-size convolutional kernels, which severely limit their receptive field. On the other hand, GCNs use superpixels to reduce the number of nodes, which will lead to losing pixel-level features, resulting in partial feature representations from both networks. To leverage the strengths of both CNNs and GCNs, a model was proposed that incorporates two subnetworks: decomposed multiscale gated guided CNNs and strengthened residual graph convolution. The decomposed multiscale gated guided CNNs are designed to capture pixel-level features at various scales using different kernel sizes. A gated change information fusion (GCF) unit integrates these multiscale pixel-level features. Meanwhile, the strengthened residual graph convolution was used to aggregate change information, which can prevent node information from becoming homogeneous. Additionally, a feature fusion module (FFM) is employed to combine features from the two subnetworks. The proposed model effectively utilizes both multiscale convolution and graph features, facilitating the learning of multilevel contextual semantic features. The experimental results on three HSI datasets demonstrate that this model outperforms several state-of-the-art methods. The code is available at https://github.com/zhangyiyan001/srgmgn.Addresses:[Xu, Shufang; Xia, Xiangfei; Sheng, Runhua; Gao, Hongmin] Hohai Univ, Coll Comp Sci & Software Engn, Nanjing 211100, Peoples R China; [Xu, Shufang] Shaanxi Key Lab Opt Remote Sensing & Intelligent I, Xian 710119, Peoples R China; [Li, Haiwei] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol CAS, Xian 710119, Peoples R China; [Zhang, Yiyan] Hohai Univ, Coll Informat Sci & Engn, Changzhou 213200, Peoples R China; [Zhang, Bing] Chinese Acad Sci, Aerosp Informat Res Inst, Beijing 100094, Peoples R ChinaAffiliations:Hohai University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Hohai University; Chinese Academy of Sciences; Aerospace Information Research Institute, CASPublication Year:2024Volume:62Article Number:5540014DOI Link:http://dx.doi.org/10.1109/TGRS.2024.3508063数据库ID（收录号）:WOS:001375996400009 -
Record 375 of
Title:Airborne Small Target Detection Method Based on Multimodal and Adaptive Feature Fusion
Author Full Names:Xu, Shufang; Chen, Xu; Li, Haiwei; Liu, Tianci; Chen, Zhonghao; Gao, Hongmin; Zhang, YiyanSource Title:IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSINGLanguage:EnglishDocument Type:ArticleKeywords Plus:IMAGE FUSIONAbstract:The detection of airborne small targets amidst cluttered environments poses significant challenges. Factors such as the susceptibility of a single RGB image to interference from the environment in target detection and the difficulty of retaining small target information in detection necessitate the development of a new method to improve the accuracy and robustness of airborne small target detection. This article proposes a novel approach to achieve this goal by fusing RGB and infrared (IR) images, which is based on the existing fusion strategy with the addition of an attention mechanism. The proposed method employs the YOLO-SA network, which integrates a YOLO model optimized for the downsampling step with an enhanced image set. The fusion strategy employs an early fusion method to retain as much target information as possible for small target detection. To refine the feature extraction process, we introduce the self-adaptive characteristic aggregation fusion (SACAF) module, leveraging spatial and channel attention mechanisms synergistically to focus on crucial feature information. Adaptive weighting ensures effective enhancement of valid features while suppressing irrelevant ones. Experimental results indicate 1.8% and 3.5% improvements in mean average precision (mAP) over the LRAF-Net model and Infusion-Net detection network, respectively. Additionally, ablation studies validate the efficacy of the proposed algorithm's network structure.Addresses:[Xu, Shufang; Chen, Xu; Chen, Zhonghao; Gao, Hongmin; Zhang, Yiyan] Hohai Univ, Coll Informat Sci & Engn, Changzhou 213200, Peoples R China; [Xu, Shufang] Shaanxi Key Lab Opt Remote Sensing & Intelligent I, Xian 710119, Peoples R China; [Li, Haiwei] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol CAS, Xian 710119, Peoples R China; [Liu, Tianci] Hohai Univ, Coll Comp Sci & Software Engn, Nanjing 211100, Peoples R ChinaAffiliations:Hohai University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Hohai UniversityPublication Year:2024Volume:62Article Number:5637215DOI Link:http://dx.doi.org/10.1109/TGRS.2024.3443856数据库ID（收录号）:WOS:001303543600007 -
Record 376 of
Title:An Iterative High-Precision Algorithm for Multi-Beam Array Stitching Method Based on Scanning Hartmann
Author Full Names:Yan, Xiangyu; Li, Dahai; Kewei, E.; Feng, Fang; Wang, Tao; Xue, Xun; Zhang, Zekun; Lu, KaiSource Title:APPLIED SCIENCES-BASELLanguage:EnglishDocument Type:ArticleAbstract:The multi-beam array stitching test system (MASTS) based on the Hartmann principle is employed to measure the aberrations in large-aperture optical systems. As each small-aperture and ideal parallel beam traverses the optical system, it is converged into a spot at the focal plane of the optical system. The centroid position of the spot contains the information about the wavefront slope of the sub-aperture at that specific location in the optical system. Scanning the optical system with this small-aperture beam across the entire aperture of the optical system, we can yield the aberration information to be tested. To mitigate pointing errors induced by scanning motion and accurately obtain the aberration signals of the optical system, nine beams are integrated into a 3 x 3 multi-beam array system, and their directions are aligned to be identical. However, achieving complete alignment in the same direction for all nine beams is a challenging task, resulting in errors due to their pointing differences within the array. This paper introduces an iterative algorithm designed to obtain high-precision multi-beam pointing errors and to reconstruct the wavefront of the optical system under test. This enables a more accurate measurement of wavefront aberrations in the optical system to be tested. Firstly, simulation models were implemented to validate the algorithm's feasibility. Additionally, a scanning optical measurement system with a multi-beam array was developed in our lab, and the iterative algorithm was applied to process our experimental data. The results were then compared with interferometer data, demonstrating that our algorithm is feasible for MASTS to measure aberrations in large-aperture optical systems with high accuracy.Addresses:[Yan, Xiangyu; Li, Dahai; Zhang, Zekun; Lu, Kai] Sichuan Univ, Sch Elect & Informat Engn, Chengdu 610065, Peoples R China; [Kewei, E.; Feng, Fang; Wang, Tao; Xue, Xun] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R ChinaAffiliations:Sichuan University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:14Issue:2Article Number:794DOI Link:http://dx.doi.org/10.3390/app14020794数据库ID（收录号）:WOS:001148903900001 -
Record 377 of
Title:Electron vortices generation of photoelectron of H2+ by counter-rotating circularly polarized attosecond pulses
Author Full Names:Yang, Haojing; Liu, Xiaoyu; Zhu, Fengzheng; Jiao, Liguang; Liu, AihuaSource Title:CHINESE PHYSICS BLanguage:EnglishDocument Type:ArticleKeywords Plus:MOMENTUMAbstract:Molecular-frame photoelectron momentum distributions (MF-PMDs) of an H-2(+) molecule ion in the presence of a pair of counter-rotating circularly polarized attosecond extreme ultraviolet laser pulses is studied by numerically solving the two-dimensional time-dependent Schrodinger equation within the frozen-nuclei approximation. At small time delay, our simulations show that the electron vortex structure is sensitive to the time delay and relative phase between the counter-rotating pulses when they are partially overlapped. By adjusting time delay and relative phase, we have the ability to manipulate the MF-PMDs and the appearance of spiral arms. We further show that the internuclear distance can affect the spiral vortices due to its different transition cross sections in the parallel and perpendicular geometries. The lowest-order perturbation theory is employed to interpret these phenomena qualitatively. It is concluded that the internuclear distance-dependent transition cross sections and the confinement effect in diatomic molecules are responsible for the variation of vortex structures in the MF-PMDs.Addresses:[Yang, Haojing; Liu, Xiaoyu; Liu, Aihua] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China; [Zhu, Fengzheng] Hubei Polytech Univ, Sch Math & Phys, Huangshi 435003, Hubei, Peoples R China; [Jiao, Liguang] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China; [Jiao, Liguang] Helmholtz Inst Jena, D-07743 Jena, Germany; [Liu, Aihua] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R ChinaAffiliations:Jilin University; Hubei Polytechnic University; Jilin University; Chinese Academy of Sciences; State Key Laboratory of Transient Optics & PhotonicsPublication Year:2024Volume:33Issue:1Article Number:13303DOI Link:http://dx.doi.org/10.1088/1674-1056/ad011a数据库ID（收录号）:WOS:001147275600001 -
Record 378 of
Title:Hyperspectral Image Reconstruction of SD-CASSI Based on Nonlocal Low-Rank Tensor Prior
Author Full Names:Yin, Xiaorui; Su, Lijuan; Chen, Xin; Liu, Hejian; Yan, Qiangqiang; Yuan, YanSource Title:IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSINGLanguage:EnglishDocument Type:ArticleKeywords Plus:ALGORITHMS; DESIGNAbstract:In single disperser coded aperture snapshot spectral imaging (SD-CASSI) systems, many methods have been developed to reconstruct hyperspectral images (HSIs) from compressed measurements. Among these, deep learning (DL)-based methods have stood out, relying on powerful DL networks. However, the solidified structure of DL-based methods limits their adaptability. Moreover, they are often based on a model that neglects the dispersion process and instead emphasizes the encoding-compression process. Furthermore, research on optimization-based methods designed especially for SD-CASSI is lacking. In this article, we propose a comprehensive two-step projection imaging model for SD-CASSI that includes both spectral shearing projection and encoding-compression projection. Based on this model, we derive a tensor-based optimization framework that incorporates with the nonlocal low-rank tensor (NLRT) prior. In particular, NLRT extracts inherent spatial structural information from the measurements and employs it to guide the clustering of spatial-spectral similar HSI blocks. A CANDECOMP/PARAFAC (CP) low-rank regularizer is introduced to constrain the low-rank property of HSI block clusters. After that, we develop a solution framework based on the alternating direction method of multiplier (ADMM) approach. Comprehensive experiments demonstrate that our NLRT method outperforms state-of-the-art methods in terms of flexibility and performance. The source code and data of this article are publicly available at https://github.com/sdnjyxr/NLRT.Addresses:[Yin, Xiaorui; Su, Lijuan; Liu, Hejian; Yan, Qiangqiang; Yuan, Yan] Beihang Univ, Sch Instrumentat & Optoelect Engn, Beijing 100191, Peoples R China; [Chen, Xin] Beihang Univ, Sch Math Sci, Beijing 100191, Peoples R China; [Yan, Qiangqiang] Chinese Acad Sci, Xian Inst Opt & Precis Mech, CAS Key Lab Spectral Imaging Technol, Xian 710119, Peoples R ChinaAffiliations:Beihang University; Beihang University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:62Article Number:5518015DOI Link:http://dx.doi.org/10.1109/TGRS.2024.3398299数据库ID（收录号）:WOS:001227320500013 -
Record 379 of
Title:Electron vortex generations in photoionization of hydrogen atoms by circularly-polarized chirped attosecond pulses
Author Full Names:Zhang, Bingshuang; Liu, Xiaoyu; Zhu, Fengzheng; Jiao, Liguang; Liu, AihuaSource Title:COMMUNICATIONS IN THEORETICAL PHYSICSLanguage:EnglishDocument Type:ArticleKeywords Plus:MOMENTUM; DYNAMICSAbstract:By numerically solving the time-dependent Schrodinger equation and employing the analytical perturbative model, we investigated the chirp-induced electron vortex in the photoionization of hydrogen atoms by a pair of counter-rotating circularly polarized chirped attosecond extremely ultraviolet pulses. We demonstrated that single-photon ionization of hydrogen atoms generates photoelectron momentum distributions (PMDs) with distinct helical vortex structures either with or without a time delay between two counter-rotating circularly polarized laser pulses. These structures are highly sensitive to both the time delay between the pulses and their chirp parameters. Our analytical model reveals that the splitting of vortex spirals is caused by the sign changing of the chirp-induced frequency-dependent time delay. We showed that to obtain the counterpart of the PMD under a pair of counter-rotating circularly polarized chirped pulses, both chirp parameters and ordering of pulses need to be reversed.Addresses:[Zhang, Bingshuang; Liu, Xiaoyu; Liu, Aihua] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China; [Zhu, Fengzheng] Hubei Polytech Univ, Sch Math & Phys, Huangshi 435003, Peoples R China; [Jiao, Liguang] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China; [Jiao, Liguang] Helmholtz Inst Jena, D-07743 Jena, Germany; [Liu, Aihua] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R ChinaAffiliations:Jilin University; Hubei Polytechnic University; Jilin University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of SciencesPublication Year:2024Volume:76Issue:1Article Number:15502DOI Link:http://dx.doi.org/10.1088/1572-9494/ad1587数据库ID（收录号）:WOS:001146988000001 -
Record 380 of
Title:Display method for high dynamic range infrared image based on gradient domain guided image filter
Author Full Names:Zhang, Feifei; Dai, Yimian; Chen, Yaohong; Peng, Xuedian; Zhu, Xiongyong; Zhou, Ruqi; Wu, Yinlin; Peng, JunfengSource Title:OPTICAL ENGINEERINGLanguage:EnglishDocument Type:ArticleKeywords Plus:DETAIL ENHANCEMENT; ALGORITHMAbstract:With the aim of handling the characteristics of infrared images, including their high dynamic range (HDR), low contrast, and blurry edges, this paper proposes an approach for displaying infrared images with gradient domain guided image filter (GIF). First, the original image is decomposed into base layer and detail layer by gradient domain GIF and Gaussian filter. Second, the adaptive double plateau histogram equalization method is used to compress the dynamic range and enhance the overall brightness of the base layer. Third, a detail gain factor is constructed to gain the detail layer, and then a display method for the detail layer is designed by considering the 3 sigma rule in Gaussian distributions. Finally, the processed base layer and detail layer are linearly fused to obtain the result image. The proposed method and five mainstream infrared image display methods are used to process infrared images collected in four different scenes. Subjective and objective evaluation methods are used to demonstrate that the proposed method is capable of compressing the dynamic range, improving the overall brightness and enhancing the local details, as well as displaying HDR infrared images with a high degree of fidelity.Addresses:[Zhang, Feifei; Zhu, Xiongyong; Zhou, Ruqi; Wu, Yinlin; Peng, Junfeng] Guangdong Univ Educ, Sch Comp Sci, Guangzhou, Peoples R China; [Dai, Yimian] Nanjing Univ Sci & Technol, Sch Comp Sci & Engn, Nanjing, Peoples R China; [Chen, Yaohong] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian, Peoples R China; [Peng, Xuedian] South China Normal Univ, Sch Comp Sci, Guangzhou, Peoples R ChinaAffiliations:Guangdong University of Education; Nanjing University of Science & Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; South China Normal UniversityPublication Year:2024Volume:63Issue:1DOI Link:http://dx.doi.org/10.1117/1.OE.63.1.013105数据库ID（收录号）:WOS:001156120200014 -
Record 381 of
Title:A Novel Computational Imaging Algorithm for Electrical Capacitance Tomography
Author Full Names:Zhao, Qing; Liu, Shi; Chen, WeiningSource Title:APPLIED SCIENCES-BASELLanguage:EnglishDocument Type:ArticleKeywords Plus:EXTREME LEARNING-MACHINE; RECONSTRUCTION ALGORITHM; ITERATION ALGORITHM; OPTIMIZATIONAbstract:High-precision images enable electrical capacitance tomography (ECT) to obtain more reliable measurement results, meaning that the reconstruction algorithm is particularly important. Some excellent numerical algorithms have successfully solved the inverse problem for ECT imaging, but their imaging quality is relatively low. To solve this problem, this paper proposes a new reconstruction algorithm based on regularized extreme learning machines (RELMs). The implementation of the algorithm is mainly divided into two steps: (1) according to a large number of training samples, the RELM model can be obtained by the iterative split Bregman (ISB) algorithm, which can describe the mapping relationship between the capacitance correlation coefficient and the imaging target well, and (2) the capacitance correlation coefficient is calculated, which is then used as input to the RELM model to predict the final imaging. Both simulation and experimental results show that the RELM algorithm achieves greater improvement in imaging quality and robustness, and provides new development ideas for the ECT.Addresses:[Zhao, Qing; Chen, Weining] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Aircraft Opt Imaging Monitoring & Measurement Tech, Xian 710119, Peoples R China; [Liu, Shi] North China Elect Power Univ, Sch Control & Comp Engn, Beijing 102206, Peoples R ChinaAffiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; North China Electric Power UniversityPublication Year:2024Volume:14Issue:2Article Number:587DOI Link:http://dx.doi.org/10.3390/app14020587数据库ID（收录号）:WOS:001149023800001 -
Record 382 of
Title:Heterostructure nanocluster MOF-derived Ag-CuO: An emerging material for harmonic soliton pulses generation
Author Full Names:Luo, Wenfeng; Sun, Penghuan; Wu, Ziyan; Ban, Xiaoqiang; Zhang, Tingting; Zhao, Yang; Li, Xiaohui; Yu, Xuechao; Shan, Guangcun; Zhao, XiaoxiaSource Title:INFRARED PHYSICS & TECHNOLOGYLanguage:EnglishDocument Type:ArticleKeywords Plus:MODE-LOCKING; SATURABLE ABSORBER; FIBERAbstract:In recent years, metal-organic framework (MOF) and their derivatives have attracted many researchers due to excellent characteristics, such as good stability, high capacity, and a modest third order nonlinear optical response. Compared with conventional optical materials, MOF-oxide are easier to benefit photonic research. However, for nonlinear optics and ultrafast photonics, research on MOFs-Transition metal oxide is still in its infancy. In this work, MOF-derived Ag-CuO was prepared by hydrothermal method and applied in passively mode-locked fiber laser. Experimental results show that MOF-derived Ag-CuO possesses excellent optical absorption, functioning as a saturable absorber (SA). The laser based on MOF-derived Ag-CuO SA realizes three different mode-locking states, including traditional soliton with the pulse width of 1.04 ps, 32nd order harmonic soliton molecule, and soliton rain pulse, with the signal-to-noise ratio (SNR) of 73 dB. This work lays the foundation of its application in ultrashort photonics and optical communication, broadening the future of MOFderived Ag-CuO.Addresses:[Luo, Wenfeng; Wu, Ziyan; Zhang, Tingting] Xian Univ Posts & Telecommun, Sch Elect Engn, Xian 710121, Shaanxi, Peoples R China; [Sun, Penghuan; Zhao, Yang; Li, Xiaohui] Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China; [Ban, Xiaoqiang] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Ban, Xiaoqiang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yu, Xuechao] Chinese Acad Sci, Suzhou Inst Nanotech & Nanobion, Suzhou 215123, Peoples R China; [Shan, Guangcun] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China; [Zhao, Xiaoxia] Xian Univ, Sch Mech & Mat Engn, Xian 710065, Shaanxi, Peoples R ChinaAffiliations:Xi'an University of Posts & Telecommunications; Shaanxi Normal University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Suzhou Institute of Nano-Tech & Nano-Bionics, CAS; Beihang University; Xi'an UniversityPublication Year:2024Volume:136Article Number:105052DOI Link:http://dx.doi.org/10.1016/j.infrared.2023.105052数据库ID（收录号）:WOS:001164838900001 -
Record 383 of
Title:All-polarization-maintaining mode-locked Holmium-doped fiber laser based upon nonlinear polarization evolution
Author Full Names:Tu, Lisha; Tang, Ziya; Li, Keyi; Wang, Jiachen; Lin, Hua; Zhang, Wenfei; Lue, Qitao; Guo, Chunyu; Ruan, ShuangchenSource Title:INFRARED PHYSICS & TECHNOLOGYLanguage:EnglishDocument Type:ArticleKeywords Plus:DISSIPATIVE SOLITON RESONANCES; NOISE-LIKE PULSE; 2.1 MU-M; OSCILLATOR; GENERATION; AMPLIFIER; NPE; FSAbstract:An all-polarization-maintaining, all-fiberized holmium (Ho) doped fiber laser mode-locked by nonlinear polarization evolution (NPE) is experimentally demonstrated for the first time. The NPE mechanism is realized via the combination of a polarizer and the cross-fusion of three sections of polarization maintaining (PM) fibers. With the appropriate manipulation of the splicing angles between the birefringent axes of the PM fibers, a highly stable mode locked operation is realized. The laser delivers stable dissipative-soliton resonance (DSR) pulses with a repetition rate of 10.34 MHz and an average power of 223.95 mW, corresponding to a pulse energy of 21.64 nJ and a peak power of 11 W. Furthermore, the output power test over 2 h implies superior stability of this design. The oscillator, performing the characteristics of self-starting, high pulse energy, and good stability, is attractive and promising for various practical application.Addresses:[Tu, Lisha; Tang, Ziya; Li, Keyi; Wang, Jiachen; Zhang, Wenfei; Guo, Chunyu] Shenzhen Univ, Key Lab Optoelect Devices & Syst,Coll Phys & Optoe, Shenzhen Key Lab Laser Engn,Guangdong Prov Key Lab, Coll Optoelect Engn,Minist Educ & Guangdong Prov, Shenzhen 518060, Peoples R China; [Tu, Lisha; Ruan, Shuangchen] Shenzhen Technol Univ, Key Lab Adv Opt Precis Mfg Technol, Guangdong Higher Educ Inst, Shenzhen 518118, Peoples R China; [Lin, Hua] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Lue, Qitao] Hans Laser Technol Ind Grp Co Ltd, Shenzhen 518057, Peoples R ChinaAffiliations:Shenzhen University; Shenzhen Technology University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CASPublication Year:2024Volume:136Article Number:105054DOI Link:http://dx.doi.org/10.1016/j.infrared.2023.105054数据库ID（收录号）:WOS:001164780000001 -
Record 384 of
Title:Bi2O2S topological transformation and in-situ regrowth of [hk1]-oriented SbBiS3-xSex 2D skeleton structure for construction of efficient quasi-two-dimensional Sb2S3-xSex-based heterojunction photoanodes
Author Full Names:Zhang, Liyuan; Liu, Xinyang; Liu, Dekang; Cheng, Yufei; Li, Qiujie; Wang, Yishan; Hu, Xiaoyun; Miao, HuiSource Title:SEPARATION AND PURIFICATION TECHNOLOGYLanguage:EnglishDocument Type:ArticleAbstract:Antimony chalcogenides (Sb2S3-xSex), as one of the promising light-absorbing materials in optoelectronic energy storage devices, has attracted widespread attention in recent years. Of particular note, its crystal structure consists of the one-dimensional [Sb4S(Se)6]n ribbons with efficient carrier transport efficiency along the [hk1] direction. In this paper, with the aid of the topological transformation of the layered material Bi2O2S, the SbBiS3-xSex bimetallic alloy with 2D skeleton structure was induced to grow in situ, and the conversion of Sb2S3-xSex preferred orientation from [hk0] to [hk1] was realized. The corresponding results showed that 2D skeleton structure was conducive to the construction of photo traps and the increase of electrochemical specific surface area. In addition, Bi2O2S acted as an electron transport layer (ETL) to further promote the migration of photo-generated carriers. At 1.23 V vs. RHE, the photocurrent density of quasi-two-dimensional Bi2O2S/SbBiS3-xSex nanosheet photoanode was as high as 6.41 mA cm-2, which was 7.5 times that of pure Sb2S3-xSex, and the peak value of IPCE could reach 40.93%. This work undoubtedly opens up a new avenue for the designing high-efficiency antimony chalcogenides photoelectrodes.Addresses:[Zhang, Liyuan; Liu, Xinyang; Liu, Dekang; Cheng, Yufei; Li, Qiujie; Hu, Xiaoyun; Miao, Hui] Northwest Univ, Sch Phys, Xian 710127, Peoples R China; [Wang, Yishan] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R ChinaAffiliations:Northwest University Xi'an; Chinese Academy of Sciences; State Key Laboratory of Transient Optics & PhotonicsPublication Year:2024Volume:334Article Number:125983DOI Link:http://dx.doi.org/10.1016/j.seppur.2023.125983数据库ID（收录号）:WOS:001143160800001