检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

倍半氧化物激光陶瓷的研究进展

硅酸盐学报 2024年第3期52卷 1006-1022页

作者：李晴王俊马杰刘鹏沈德元章健于浩海张怀金唐定远山东大学晶体材料国家重点实验室济南250100 江苏师范大学江苏省先进激光材料与器件重点实验室江苏徐州221116 中国科学院上海硅酸盐研究所上海201899 深圳技术大学聚龙学院广东深圳518118

倍半氧化物透明陶瓷具有声子能量低、热膨胀系数低、损伤阈值高、热导率高等优势,在固体激光领域有着极大的应用前景。提出了研制高质量倍半氧化物透明陶瓷亟需解决的瓶颈问题,阐述了在倍半氧化物陶瓷制备过程中提高光学质量、减少晶格... 详细信息

倍半氧化物透明陶瓷具有声子能量低、热膨胀系数低、损伤阈值高、热导率高等优势,在固体激光领域有着极大的应用前景。提出了研制高质量倍半氧化物透明陶瓷亟需解决的瓶颈问题,阐述了在倍半氧化物陶瓷制备过程中提高光学质量、减少晶格缺陷的关键措施,总结了稀土离子掺杂倍半氧化物陶瓷在1~3μm波段固体激光器应用中的代表性成果,并对倍半氧化物激光陶瓷的未来发展进行了展望。

关键词：倍半氧化物透明陶瓷稀土离子激光陶瓷固体激光

Fabrication and comprehensive structural and spectroscopic properties of Er:Y_(2)O_(3)transparent ceramics

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2022年第12期40卷 1913-1919,I0004页

作者： Yan Ling Xue Feng Zhu Jun Wang Shiyu Sun Lili Hu dingyuan tang School of Communication and Electronics Engineering East China Normal UniversityShanghai 200241China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China Shanghai Research Center for Quantum Sciences Shanghai 201315China School of Electrical and Electronic Engineering Nanyang Technological University639798Singapore Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China

Transparent Er:Y_(2)O_(3)ceramics with sub-micron grain size(<1μm)were fabricated by using one-step vacuum sintering followed by hot isostatic pressing(HIPing)*** transmission of the undoped Y_(2)O_(3)reaches 83%.The structural characteristics including the phonon energy were investigated through X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)analysis and scanning electron microscopy(SEM)*** overall spectroscopic properties of transmission,fluorescence emission up to 3000 nm,lifetime,up-conversion luminescence,and refractive index were systematically studied for both 0.25 at%and 7.0 at%Er:Y_(2)O_(3)ceramics with different *** comparison of the spectra of the fluorescence emission and up-conversion luminescence under both 976 and 808 nm laser excitation was *** multiple high-energy-state transitional processes after the excited state absorption(ESA)processes involved in the up-conversion are discriminated between the multi-phonon non-radiative transitions and the radiative transitions according to the measured maximum phonon vibrational *** calculation was performed based on the Judd-Ofelt theory.

关键词： Erbium Sesquioxides Vibrational energy Red-shift Up-conversion Judd-Ofelt theory

GROWTH OF BETA-BARIUM METABORATE SINGLE CRYSTAL FIBERS ALONG THE PHASE MATCHING DIRECTION

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1990年第12期7卷 568-571页

作者： HOU Jianguo tang dingyuan CHEN Chuangtian YE Linghua CHEN Jiqin DING Zuchang Fujian Institute of Research on the Structure of Matter Academia SinicaFuzhou 350002 Graduate School Zhejiang UniversityHangzhou 310027

High optical quality single crystal fibers of β-BaB_(2)O_(4)(BBO),an important nonlinear optical material,were grown along the second-harmonic generation phase matching direction by the laser heated pedestal growth *** effects of various growth parameters,especially growth rate,on growth stability and fiber quality were *** was found that 0,25mm/min is the suitable growth rate which can reduces the harmful effects of growth anisotropy and constitutional supercooling on fiber quality.

关键词： fiber optical heated

High transparency Pr:Y_(2)O_(3) ceramics:A promising gain medium for red emission solid-state lasers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2022年第6期11卷 874-881页

作者： Qing LI Ying WANG Jun WANG Jie MA Meng NI Hui LIN Jian ZHANG Peng LIU Xiaodong XU dingyuan tang Jiangsu Key Laboratory of Advanced Laser Materials and Devices School of Physics and Electronic EngineeringJiangsu Normal UniversityXuzhou 221116China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore Engineering Research Center of Optical Instrument and System Ministry of Education and Shanghai Key Lab of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 201899China

Highly transparent 0.5 and 1.0 at%Pr-doped Y_(2)O_(3)ceramics were fabricated by vacuum sintering plus hot isostatic pressing(HIP)*** selection of suitable pre-sintering temperatures and right microstructures before HIP was critical to obtain high density of the final sintered *** well-densified ceramics had pore-free microstructures with an average grain size of about 1μ*** was also found that the charge states of the Pr ions could be changed through regulating the annealing atmospheres,resulting in different absorption and emission characteristics in the visible wavelength *** in reducing atmosphere(5%H_(2)/95%Ar)favored the formation of Pr^(3+),resulting in stronger red emissions,while annealing in oxygen atmosphere led to the rise of lattice constant due to the concentration increase of oxygen *** H_(2)/Ar-annealed 0.5 at%Pr:Y_(2)O_(3)ceramics exhibited strong red emission at 600–675 nm,which may be a promising gain material for red solid-state lasers.

关键词： praseodymium ions(Pr3+) Y_(2)O_(3)ceramic valence state defect state optical properties

Passive harmonic mode locking of gain-guided solitons in erbium-doped fiber lasers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2008年第5期53卷 676-680页

作者： ZHAO LuMing tang dingyuan CHENG Tee Hiang TAM Hwa-Yaw LU Chao School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore Department of Electrical Engineering Hong Kong Polytechnic University Hong Kong China Department of Electronic and Information Engineering Hong Kong Polytechnic University Hong Kong China

We report the experimental observation of passive harmonic mode locking of gain-guided solitons in erbium-doped fiber lasers either made of purely normal dispersion fibers or operating in the net normal cavity dispersion regime. Harmonic-2 and harmonic-3 mode locking states of the gain-guided solitons with supermode suppression larger than 35 dB have been obtained.

关键词：铒掺杂光纤激光器孤波被动谐波振荡型同步正常色散

A stable and efficient La-doped MIL-53(Al)/ZnO photocatalyst for sulfamethazine degradation

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2022年第4期40卷 595-604,I0004页

作者： Qiuming Wei Wei Li Chun Jin Yasi Chen Linlin Hou Zhiliang Wu Zhongliang Pan Qinyu He Yinzhen Wang dingyuan tang Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China Guangdong Engineering Technology Research Center of Efficient Green Energy and Environmental Protection Materials Guangzhou 510006China School of Electrical and Electronic Engineering Nanyang Technological University639798Singapore

Photocatalytic technology can solve various environmental pollution problems,especially antibiotic pollution.A novel La-doped MIL-53(Al)/ZnO composite material was successfully synthesized by a combination of hydrothermal method and calcination,showing high photocatalytic degradation percent of sulfamethazine(SMT).The 2 mol%La MIL-53(Al)/ZnO photocatalyst shows the highest degradation efficiency toward SMT(92%)within 120 min,which is 4.1 times higher than pure ZnO(increased from 18%to 92%).In addition,the degradation analysis of SMT by high performance liquid chromatography proves that the products are CO_(2) and H_(2)*** improved photocatalytic activity is mostly caused by the following factors.(1)Doping La ions can decrease the band gap of ZnO,enhance light response,and effectively enhance the separation rate of photo-generated holes and electrons.(2)MIL-53(Al)can adsorb SMT and promote the separation of *** work shows that the synthesized La-doped MIL-53(Al)/ZnO photocatalyst is expected to be used as a green and effective method for treatment of environment water pollution.

关键词： Sulfamethazine Photocatalytic degradation Zinc oxide Lanthanum doping Rare earths

Monolayer Graphene as a Saturable Absorber in a Mode-Locked Laser

在线全文

学校读者我要写书评

暂无评论

Nano Research 2011年第3期4卷 297-307页

作者： Qiaoliang Bao Han Zhang Zhenhua Ni Yu Wang Lakshminarayana Polavarapu Zexiang Shen Qing-Hua Xu dingyuan tang Kian Ping Loh Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Singapore School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore These authors contributed equally to this work.

We demonstrate that the intrinsic properties of monolayer graphene allow it to act as a more effective saturable absorber for mode-locking fiber lasers when compared to multilayer graphene. The absorption of monolayer graphene can be saturated at lower excitation intensity compared to multilayer graphene, graphene with wrinkle-like defects, or functionalized graphene. Monolayer graphene has a remarkably large modulation depth of 65.9%, whereas the modulation depth of multilayer graphene is greatly reduced due to nonsaturable absorption and scattering loss. Picosecond ultrafast laser pulses （1.23 ps） can be generated using monolayer graphene as a saturable absorber. Due to the ultrafast relaxation time, larger modulation depth and lower scattering loss of monolayer graphene, it performs better than multilayer graphene in terms of pulse shaping ability, pulse stability, and output energy.

关键词： Graphene saturable absorber laser carrier dynamics ultrafast photonics

Light-driven sextuple theranostics:nanomedicine involving second near-infrared AIE-active Ir(Ⅲ)complex for prominent cancer treatment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第7期67卷 2314-2324页

作者： Xue Liu Jiangao Li Fei Zhang dingyuan Yan Lei Wang Dong Wang Ben Zhong tang Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsCollege of Material Science and EngineeringShenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Shenzhen 518172China

Light-driven cancer theranostics has shown inexhaustible and vigorous vitality by virtue of its high efficacy,prominent controllability and *** of an all-round theranostic material simultaneously affording both multimodal diagnosis imaging and synergistic phototherapy would be an appealing yet significantly challenging ***,a novel nanomedicine Ir@PPEG-MeEPO was ingeniously constructed by integrating beforehand1O2-charged amphiphilic polymer and well-tailored Ir(Ⅲ)complex IrDPTP,which was featured by second near-infrared(NIR-Ⅱ)aggregation-induced emission(AIE)tendency,efficient reactive oxygen species(ROS)generation,good photothermal conversion efficiency and high-performance hydrogen gas *** the best of our knowledge,IrDPTP held the longest emission wavelength among all reported AIE Ir(Ⅲ)***,Ir@PPEG-MeEPO was capable of controllably releasing ROS via triggered photothermal effect upon NIR irradiation,making it well-adapted to hypoxic environment of *** distinctive characteristics of Ir@PPEG-MeEPO endowed it with unprecedented performance on sextuple theranostics comprised of NIR-Ⅱfluorescence-photoacoustic-photothermal trimodal imaging and photodynamic-photothermal-hydrogen trimodal therapy,witnessed by the precise tumor diagnosis and complete tumor *** study would open up new perspectives for the exploration of superior nanomedicine for practical cancer theranostics.

关键词： aggregation-induced emission NIR-II emission cancer theranostics multimodal diagnosis imaging multimodal therapy

Tunable and switchable harmonic h-shaped pulse generation in a 3.03 km ultralong mode-locked thulium-doped fiber laser

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2019年第3期7卷 332-340页

作者： JUNQING ZHAO LEI LI LUMING ZHAO dingyuan tang DEYUAN SHEN LEI SU Jiangsu Key Laboratory of Advanced Laser Materials and Devices Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging IndustrySchool of Physics and Electronic EngineeringJiangsu Normal University School of Engineering and Materials Science Queen Mary University of London

We experimentally demonstrated a type of tunable and switchable harmonic h-shaped pulse generation in a thulium-doped fiber(TDF) laser passively mode locked by using an ultralong nonlinear optical loop *** total cavity length was ～3.03 km, the longest ever built for a TDF laser to our best knowledge, which resulted in an ultralarge anomalous dispersion over -200 ps^2 around the emission wavelength. The produced h-shaped pulse can operate either in a fundamental or in a high-order harmonic mode-locking(HML) state depending on pump power and intra-cavity polarization state(PS). The pulse duration, no matter of the operation state, was tunable with pump power. However, pulse breaking and self-organizing occurred, resulting in high-order HML,when the pump power increased above a threshold. At a fixed pump power, the order of HML was switchable from one to another by manipulating the PS. Switching from the 8 th up to the 48 th order of HML was achieved with a fixed pump power of ～4.15 W. Our results revealed the detailed evolution and switching characteristics of the HML and individual pulse envelope with respect to both the pump power and PS. We have also discussed in detail the mechanisms of both the h-shaped pulse generation and the switching of its HML. This contribution would be helpful for further in-depth study on the underlying dynamics of long-duration particular-envelope pulses with ultralarge anomalous dispersion and ultralong roundtrip time.

关键词： ultralong mode-locked thulium-doped fiber laser switchable harmonic