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2 μm超窄线宽光纤激光实现1.kW近衍射极限输出

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强激光与粒子束 2024年第7期36卷 1-3页

作者：刘航王宏宇王佳伟于洋张骞文冯昱骏孙殷宏徐善辉鲁燕华唐淳中国工程物理研究院应用电子学研究所四川绵阳621900 先进激光与高功率微波全国重点实验室四川绵阳621900 华南理工大学光通信材料研究所广州510600 军事航天部队装备部军事代表局驻绵阳地区军事代表室四川绵阳621000 中国工程物理研究院研究生部北京100088

2 μm波段光纤激光广泛应用于生物医学、环境监测、非线性频率转换,以及激光雷达和激光通信领域,备受研究人员关注。然而,该波段的激光器功率提升面临着低量子效率、高热负载和部分非线性效应的限制。基于反转概率调谐序列的高阶相位调... 详细信息

2 μm波段光纤激光广泛应用于生物医学、环境监测、非线性频率转换,以及激光雷达和激光通信领域,备受研究人员关注。然而,该波段的激光器功率提升面临着低量子效率、高热负载和部分非线性效应的限制。基于反转概率调谐序列的高阶相位调制技术以抑制SBS效应、多级链路自动反馈的信号激光时域稳定控制技术以提升SRS阈值,以及光纤基横模纯化技术以控制光束质量,采用两级主放大结构,在1.950 nm波长实现了1.kW窄线宽近衍射极限输出,光光转换效率达55.6%,线宽3.8 GHz,光束质量M~2约1.2,在最高功率时无横向模式不稳定效应。

关键词：光纤激光 MOPA放大掺铥光纤激光器模式不稳定量子亏损

Elastic scattering of ^(1.)C and ^(1.)C isotopes on a ^(208)Pb target at energies of approximately five times the Coulomb barriers

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Chinese physics C 2024年第3期48卷 65-71页

作者：杨过段芳芳王康杨彦云孙志宇 Valdir Guimarães 庞丹阳陈文棣金磊许世伟马军兵马朋白真汪凌昊刘泉王惠仁吕冰锋郭松 Mukhi Kumar Raju 王秀华李荣华张玉虎周小红胡正国徐瑚珊 CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100080China Instituto de Física Universidade de São PauloRua do Matão1371São Paulo 05508-090SPBrazil School of physics and Beijing Key Laboratory of Advanced Nuclear Materials and physics Beihang UniversityBeijing 100191China School of physics Science and Engineering Tongji UniversityShanghai 200092China School of physics and Optoelectronic Engineering Anhui UniversityHefei 230601China Department of physics GITAM School of ScienceGITAM UniversityVisakhapatnam 530045India

The elastic scattering angular distributions of ^(1.)C at 340 MeV and ^(1.)C at 294 MeV and 342 MeV on a ^(208)Pb target,which correspond to approximately five times the Coulomb barriers,were measured at the Radioactive Ion Beam Line in *** data were analyzed within the optical model and continuum-discretized coupled-channels(CDCC)framework,and the results of both calculations could effectively account for the experimental *** differential cross sections of elastic scattering revealed no particular suppression at the Coulomb nuclear interference peak angles,suggesting that the breakup coupling effects on the elastic scattering angular distributions were negligibly small in this incident energy *** contributions from the couplings with inelastic states to the elastic cross sections were of minor importance within the angular range covered by these experiments.

关键词： elastic scattering radioactive ion beam angular distribution optical model coupling effects

Reinforced polysulfide barrier by g-C_(3)N_(4)/CNT composite towards superior lithium-sulfur batteries

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Journal of Energy Chemistry 2021年第2期30卷 234-240,I0008页

作者： Xiangliang Wang Gaoran Li Minjie Li Ruiping liu Haibo Li Tengyu Li Mingzhu {1. Yirui Deng Ming feng Zhongwei Chen Department of Materials Science and Engineering China University of Mining Technology(Beijing)Beijing 100083China Departmenf of Chemical Engineering University of WaterlaoWaterloo N2L 3G1.ON.Canada Key Laboratory of Functional Materials physics and Chemistry of the Ministry of Education.Jilin Normal {1. Changchun 130103JilinChina

The notorious shuttle effect has long been obstructing lithium-sulfur(Li-S) batteries from yielding the expected high energy density and long ***,we develop a multifunctional polysulfide barrier reinforced by the graphitic carbon nitride/carbon nanotube(g-C_3 N_4/CNT) composite toward inhibited shuttling behavior and improved battery *** obtained g-C_3 N_4 delivers a unique spongelike architecture with massive ion transfer pathways and fully exposed active interfaces,while the abundant C-N heteroatomic structures impose strong chemical immobilization toward lithium *** with the highly conductive agent,the g-C_3 N_4/CNT reinforced separator is endowed with great capability of confining and reutilizing the active sulfur within the cathode,thus contributing to an efficient and stable sulfur *** from these synergistic attributes,Li-S cells based on g-C_3 N_4/CNT separator exhibit an excellent cyclability with a minimum decay rate of 0.03% per cycle over 500 cycles and decent rate capability up to 2 ***,a high areal capacity of 7.69 mAh cm^(-2)can be achieved under a raised sulfur loading up to 1..1.mg cm^(-2).demonstrating a facile and efficient pathway toward superior Li-S batteries.

关键词： Graphitic carbon nitride Reinforced separator Lithium sulfur battery Chemical interaction Synergistic effect

Influence of He ion irradiation on the microstructure and hardness of Ni-TiC_(NP)composites

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Nuclear Science and Techniques 2021年第11期32卷 32-41页

作者： Min liu Yong-{1. Yan Zhen-Bo Zhu Lin-{1. Ye Ren-Duo liu He-Fei Huang Sino-French institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Shanghai institute of Applied {1. Chinese Academy of SciencesShanghai 201800China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China

In the present study,samples of a titanium carbide nanoparticle-reinforced nickel alloy(Ni-TiC_(NP)composite)were irradiated with 1.MeV He ions at 700°*** evolution of He bubbles and nanohardness was characterized using transmission electron microscopy(TEM)and nanoindentation,*** images showed that the size and number density of He bubbles in the grains were affected by the He ion *** number density first increased significantly and then decreased with increasing ion dose,while the size exhibited an inverse ***,the swelling induced by He bubbles continuously increased with increasing ion *** bubbles also formed in the grain boundaries,interior of the TiC nanoparticles,and interfaces between the TiC nanoparticles and Ni *** measurements indicated a decrease in nanohardness after irradiation,which is attributed to the disappearance of intrinsic dislocation lines caused by He ion irradiation.

关键词： Ni–TiC_(NP)composites He bubbles Swelling Irradiation-induced softening

Status of aquatic organisms resources and their environments in Yangtze River system(201.-2021.⋆

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Aquaculture and Fisheries 2024年第5期9卷 833-850页

作者： Haile Yang Li Shen Yongfeng He Huiwu Tian Lei Gao Jinming Wu Zhigang Mei Nian Wei Lin Wang Tingbing Zhu Feifei Hu Jinling Gong Hongchun Du Xinbin Duan Huatang Deng Daoqun Wang fengyue Zhu Yunfeng Li Fan Wu Huijun Ru Yan Zhang Junyi Li Junlin Yang Yuntao Zhou Dongdong Fang Yinping Wang Danqing Lin Yanping Yang Peijie Li Silei liu Jian Yang Ping Zhuang Sikai Wang Tao Zhang Gang Yang Wenbo Yang Lilai Yuan Kun Cao Shuo Xu Huiyuan liu Zhiqiang Liang Chongrui Wang Hong Li Xiping Yuan Xin Yang Yilong Fu Yanping Zhang Haixin Zhang Zhiying Tao Sheng Wang Xiaoping Gao Binsong Jin Kemao Li Guojie Wang Shenglong Jian Yingqin Li Chenjiang Xue Chunyun Lei Shaowei Xue Yi sun Bin Zhu Ke Shao Xingkun Hu Meihua Xiong Jun Du Bin He Tao Yan Yingying Huang Yuanchao Zou Biwen Xie Yongming Wang Bin Li Fei liu Yaoyao Zhang Fei Fan Zhijian Wang Jing Huang haoran Gu Hailong Ge Yan Dan Yan Li Shuqiao Wang Chuang Zhang Lu Zhou Xue Wang Sheng Zeng Yan Xiang Xugang He Jianhui Qin Chengxing Xia Jie Hou Yifu Shi Lifang Gao Zhiqiang Zhu Hongbao Shen Yun Du Xuejun Duan Jiawu Xiong Deguo Yang Shaoping liu Zhaohui Ni Hui Zhang Kai liu feng Zhao Yingren Li Jianwei Wang Qiwei Wei Yangtze River Fisheries Research institute Chinese Academy of Fishery SciencesWuhan430223China institute of Hydrobiology Chinese Academy of SciencesWuhan430072China Fishery Resource and Environment Research Center Chinese Academy of Fishery SciencesBeijing100141China Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization Ministry of Agriculture and Rural AffairsFreshwater Fisheries Research CenterChinese Academy of Fishery SciencesWuxi214081China East china Sea Fisheries Research {1. Chinese Academy of Fishery SciencesShanghai200090China institute of Fisheries Engineering Chinese Academy of Fishery SciencesBeijing100141China Hunan Fisheries Science institute Changsha410153China Jiangxi Fisheries Research institute Nanchang330039China Jiujiang Academy of Fishery Sciences Jiujiang332000China School of Life Sciences Nanchang UniversityNanchang330031China Qinghai Provincial Fishery Technology Extension Center Xining810012China Yunnan Academy of Fishery Sciences Kunming650111China institute of Hydroecology Ministry of Water Resources and Chinese Academy of SciencesWuhan430079China Fisheries institute Sichuan Academy of Agricultural SciencesChengdu611731China School of Life Sciences Neijiang Normal UniversityNeijiang641100China School of Life Sciences Southwest UniversityChongqing400715China Chongqing Fishery Sciences Research institute Chongqing401120China Guizhou Fisheries Research institute Guiyang550025China College of Fisheries Huazhong Agricultural UniversityWuhan430072China Hubei Fisheries Science Research institute Wuhan430070China Shaanxi Fisheries Research institute Xi’an710086China Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China Nanjing institute of Geography and Limnology Chinese Academy of SciencesNanjing210008China Central South Inventory and Planning institute of State Forestry and Grassland Administration Changsha410014China

The Yangtze River is the mother river of *** promote the aquatic ecosystem protection of the great river,the Project of Yangtze Fisheries Resources and Environment Investigation(201.-2021.supported by the Ministry of Agriculture and Rural Affairs,*** carried out by 24 institutes and universities that located in the Yangtze River basin surveys the status of(1.fish species composition and spatial distribution,(2)current fish abundance,(3)endangered fishes,(4)Yangtze finless porpoise,(5)aquatic eco-environments,(6)water-level fluctuation areas,(7)capture fisheries and recreational fisheries of the Yangtze River mainstream and 1. of its main tributaries,including Yalong River,Heng River,Min River(including Dadu River),Chishui River,Tuo River,Jialing River,Wu River,Han River,Dongting Lake and Poyang *** results showed that there were 443 fish species(belonging to 1.3 genus,37 families,and 1. orders)before 201.,but only 323 fish species(including 1. new recorded exotic species)were recorded in the project of *** them,Cyprinus carpio,Carassius auratus,Hypophthalmichthys molitrix,Pelteobagrus fulvidraco,Coilia brachygnathus,Silurus asotus,Saurogobio dabryi,Ctenopharyngodon idellus,Pelteobagrus nitidus,Hemiculter leucisculus,Siniperca chuatsi,Coreius heterodon,Culter alburnus,Parabramis pekinensis,and Aristichthys nobilis were the dominant species across the whole Yangtze River *** is estimated that there were 886 million individuals weighing 1.4.8 million kg,merely equivalent to 27.3%of the resources in 1.50s,30.9%of the resources in 1.60s,or 58.7%of the resources in *** the new list of protected fishes that recorded in the Yangtze River system,only 1. of 29 were collected in this project of *** gladius has been affirmed to be Extinct by International Union for Conservation of Nature(IUCN).The wild individuals of Tenualosa reevesii and Luciobrama macrocephalus have disappeared for many years and maybe have been extinct

关键词： Fishes Yangtze finless porpoise Resources Aquatic ecosystem Fisheries Background investigation Yangtze river system

Superior high-temperature wear resistance of an Ir-Ta-Ni-Nb bulk metallic glass

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Journal of Materials Science & Technology 2023年第27期158卷 121-132页

作者： Fei sun Shengtao Deng Jianan Fu Jiahua Zhu Dandan Liang Pengfei Wang Hang Z{1. feng Gong Jiang Ma Yanhui liu Jun Shen Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics Southern university of Science and Technology Shenzhen 518055China Shanghai Engineering Research Center of Physical Vapor Deposition(PVD)Superhard Coating and Equipment Shanghai Institute of TechnologyShanghai 201418China institute of {1. Chinese Academy of SciencesBeijing 100190China

Wear resistance is a critical consideration in engineering *** this study,we demonstrated an Ir-Ta-Ni-Nb bulk metallic glass(BMG)with outstanding high-temperature wear resistance and revealed its promising applications in extreme *** wear behavior and mechanism were systemati-cally investigated from room temperature(RT)to 750℃.The results show that the wear rate increases from∼2.65×1.^(-6)mm^(3)N^(-1.m^(-1.to∼1..56×1.^(-6)mm^(3)N^(-1.m^(-1.in the temperature span RT to 400℃,following abrasive wear and flash temperature-induced oxidative wear during the ***,at the higher temperature of 600℃,further heating due to frictional heat leads to a softening of the wear surface,resulting in a maximum wear rate of∼20.99×1.^(-6)mm^(3)N^(-1.m^(-1.under softness-driven abrasive wear as well as oxidative ***,the wear resistance at an even higher temperature of 750℃shows a paradoxical improvement of∼7.08×1.^(-6)mm^(3)N^(-1.m^(-1.,which is attributed to the formation of an oxide layer with a thickness of several microns,avoiding violent wear of *** re-sults demonstrate the unreported outstanding high-temperature wear resistance of the Ir-Ta-Ni-Nb BMG,especially its excellent capability to resist wear at 750℃,leading to the promising applications of BMG in the fields of aerospace,metallurgy,and nuclear industries.

关键词： High-temperature alloy Superior wear resistance Wear mechanisms Bulk metallic glass

The Modified Weak Galerkin Finite Element Method for Solving Brinkman Equations

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Journal of Mathematical Research with Applications 2019年第6期39卷 657-676页

作者： Li-na sun Yue {1. Yuanyuan liu Ran ZHANG Department of Mathematics Jilin University Laboratory of Computational physics Institute of Applied Physics and Computational Mathematics

A modified weak Galerkin(MWG) finite element method is introduced for the Brinkman equations in this paper. We approximate the model by the variational formulation based on two discrete weak gradient operators. In the MWG finite element method, discontinuous piecewise polynomials of degree k and k-1.are used to approximate the velocity u and the pressure p, respectively. The main idea of the MWG finite element method is to replace the boundary functions by the average of the interior functions. Therefore, the MWG finite element method has fewer degrees of freedom than the WG finite element method without loss of accuracy. The MWG finite element method satisfies the stability conditions for any polynomial with degree no more than k-1. The MWG finite element method is highly flexible by allowing the use of discontinuous functions on arbitrary polygons or polyhedra with certain shape *** order error estimates are established for the velocity and pressure approximations in H~1.and L~2 norms. Some numerical examples are presented to demonstrate the accuracy, convergence and stability of the method.

关键词： the Brinkman equations the modified weak Galerkin finite element method discrete weak gradient

Measurement of the neutron total cross section of^(9)Be at the Back-n white neutron source of CSNS

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Chinese physics C 2024年第8期48卷 140-152页

作者： Jiangbo Bai Jingyu Tang Liqun Shi Yonghao Chen Han Yi Jie Bao Yu Bao Ping Cao haolei Chen Zhen Chen Zengqi Cui Ruirui Fan Changqing feng Keqing Gao Xiaolong Gao Minhao Gu Changcai Han Guozhu He Yongcheng He Yang Hong Yiwei Hu Hanxiong Huang Xiru Huang haoyu Jiang Wei Jiang Zhijie Jiang Hantao Jing Ling Kang Bo Li Chao Li Jiawen Li Qiang Li Xiao Li Yang Li Jie liu Shubin liu Ze Long Guangyuan Luan Changjun Ning Mengchen Niu Binbin Qi Jie Ren Xichao Ruan Zhaohui Song Kang sun Zhijia sun Zhixin Tan Xinyi Tang Binbin Tian Lijiao Wang Pengcheng Wang Zhaohui Wang Xiaoguang Wu Xuan Wu Likun Xie Xiaoyun Yang Li Yu Tao Yu Yongji Yu Guohui Zhang Linhao Zhang Qiwei Zhang Xianpeng Zhang Yuliang Zhang Zhiyong Zhang Luping Zhou Zhihao Zhou Kejun Zhu institute of Modern {1. Fudan UniversityShanghai 200433China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Sate Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China institute of High Energy {1. Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Department of Modern physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Northwest institute of Nuclear Technology Xi’an 710024China university of Chinese Academy of Sciences Beijing 100049China

The neutron total cross section data of^(9)Be are essential in the nuclear structure model research of light nuclei and nuclear power *** neutron total cross section of^(9)Be in the 0.3 eV−1.0 MeV energy region has been measured using time-of-flight and transmission methods with the Neutron Total Cross Sectional Spectrometer(NTOX)based on the multi-cell fast fission chamber at the china Spallation Neutron Source(CSNS)-Back-n white neutron source(Back-n).The fission count-neutron energy distributions of ^(235)U and ^(238)U without samples and with Be samples with three thicknesses were measured in the double-bunch operation mode for a beam power of 1.0 *** Bayesian method was used to eliminate the influence of the double-bunch problem on neutron measurement in the energy region above 1. *** neutron total cross section of^(9)Be results was consistent with ENDF/B-VIII.0 evaluation library data in the 0.3 eV−20 MeV energy *** the energy ranges of 0.3 eV to 1. keV and 0.01.to 20 MeV,the deviations between our results and the evaluation results of ENDF/B-VIII.0 were within 2.5%and 1.%,*** the resonance energy region,the measured resonance energies in our experiment were 0.63,0.82,and 2.8 MeV,*** results showed that the total cross section uncertainties of three Be samples were within 2.2%in the energy region below 1.*** total cross section uncertainty of 30 mm Be from ^(235)U was the smallest and less than 5%in the energy region of 0.3 eV−1.0 *** results of this experiment can provide technical support for further data analysis and related nuclear data evaluation.

关键词： ^(9)Be neutron total cross section CSNS Back-n time-of-flight method transmission method multi-cell fast fission chamber

Empowering magnetic strong coupling and its application for nonlinear refractive index sensing

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Nano Research 2022年第8期15卷 7604-7613页

作者： Song sun Dong Li Dacheng Wang Zheng {1. Wei Tan Lin Wu Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore institute of High Performance Computing A*STAR(Agency for ScienceTechnology and Research)1 Fusionopolis Way#16-16 ConnexisSingapore 138632Singapore

In the context of quantum strong coupling,the magnetic dipole(MD)emitters are largely overlooked due to the rarity of MD source and the non-magnetic nature of matters at high *** on a semi-classic model,we theoretically demonstrate magnetic strong coupling between an MD cluster(Er^(3+):4 I1./2→4 I1./2 transition at 1.550 nm)and an antenna-in-cavity *** is found that placing the plasmonic diabolo/s-diabolo nanoantenna,which supports strong electric/magnetic dipole mode,inside a dielectric cavity could largely improve the strong coupling coefficient while suppressing the cavity loss rate compared to the bare nanoantenna counterparts,empowering the magnetic quantum strong coupling at a level of 1.4 emitters,which is remarkable considering the weak MD dipole momentum and small hotspot region at high ***,the two Rabi resonance branches undergo highly asymmetrical changes upon a small variation on the environmental refractive index,which leads to an exotic exponential sensitivity profile by tracing the ratio between the two resonances *** proposed magnetic strong coupling for nonlinear refractive index sensing may add a new category to quantum plasmonic sensors.

关键词： nanoplasmonic cavity magnetic dipole emitter strong coupling Rabi-splitting sensing