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Dispersion Tuning of a SOA Fiber Laser Inc.rporating a Linearly c.irped Fiber Grating

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光学学报 2003年第S1期23卷 435-436页

作者： W. W. Tang c. shu Department of Elec.ronic.Engineering The Chinese University of Hong Kong Shatin N.T. Hong Kong PRC.Department of Electronic Engineering The Chinese University of Hong Kong Shatin N.T. Hong Kong PRC.

-We desc.ibe a simple method to generate wavelength-tunable pulses by using a semic.nduc.or optic.l amplifier (SOA) as an intensity modulator and a gain medium. Wavelength tunable pulses at a repetition rate of 4.8 GH... 详细信息

关键词： SOA in be as of Dispersion Tuning of a SOA Fiber Laser Inc.rporating a Linearly c.irped Fiber Grating

Polarization-Insensitive All-Optic.l Time-Division Demultiplexer c.nstruc.ed with a Nonlinear Loop Interferometer

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光学学报 2003年第S1期23卷 589-590页

作者： T.K. Liang c.S. Wong H.K. Tsang c. shu The c.inese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong ChinaThe Chinese University of Hong Kong Department of Electronic Engineering Hong Kong China

A polarization-insensitive 40-Gb/s time-division demultiplexer was demonstrated in a polarization-diversity loop c.nfiguration. The power penalty was measured to be 2.3 dB at a bit error rates of 10-9 for 10 Gb/s outp... 详细信息

关键词： OTDM et in Polarization-Insensitive All-Optic.l Time-Division Demultiplexer c.nstruc.ed with a Nonlinear Loop Interferometer UNI were FWHM BERT length of with

Nonlinear Pulse c.mpression and Reshaping Using c.oss-Phase Modulation in a Dispersion-Shifted Fiber

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光学学报 2003年第S1期23卷 395-396页

作者： S. W. c.an K. K. c.ow c. shu The c.inese University of Hong Kong Department of Electronic Engineering Shatin N.T. Hong KongThe Chinese University of Hong Kong Department of Electronic Engineering Shatin N.T. Hong KongThe Chinese University of Hong Kong Department of Electronic Engineering Shatin N.T. Hong Kong

Nonlinear pulse c.mpression has been demonstrated by c.oss-phase modulation in a dispersion-shifted fiber. The output is obtained from filtering of the broadened optic.l spec.rum and a pulse width reduc.ion from 61 to... 详细信息

关键词： DSF of line on IEEE as in Nonlinear Pulse c.mpression and Reshaping Using c.oss-Phase Modulation in a Dispersion-Shifted Fiber EDFA XPM dBm

Photonic.Analog-to-Digital c.nversion of Time-c.ntinuous Signals using a TDM Switc.ing-Wavelength Sampling Sourc.

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光学学报 2003年第S1期23卷 593-594页

作者： K. L. Lee M. P. Fok c. shu Department of Elec.ronic.Engineering The Chinese University of Hong Kong Shatin N.T. Hong Kong ChinaDepartment of Electronic Engineering The Chinese University of Hong Kong Shatin N.T. Hong Kong ChinaDepartment of Electronic Engineering The Chinese University of Hong Kong Shatin N.T. Hong Kong China

A 20 Gsample/s photonic.analog-to-digital c.nverter is c.nstruc.ed using a 4-switc.ing-wavelength repetitive sampling pulse sourc.. The signal-to-noise and distortion ratio (SINAD) is measured to be 44.5 dB and c.rres... 详细信息

关键词： of rate as TDM Photonic.Analog-to-Digital c.nversion of Time-c.ntinuous Signals using a TDM Switc.ing-Wavelength Sampling Sourc. GHz

c.-substituted nic.el hexac.anoferrate with tunable reac.ion potentials for superior ammonium ion storage

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Journal of Materials Sc.enc. & Tec.nology 2024年第2期169卷 19-27页

作者： Leiyu Fan Guangc.ang shu Yiwen Liu Haoxiang Yu Lei Yan Liyuan Zhang Jie shu Sc.ool of Materials Sc.enc. and c.emic.l Engineering Ningbo UniversityNingbo 315211China

In this work,a variety of c._(x)Ni_(2-x)Fe(c.)_(6)(x=0,0.4,0.8,1.2,1.6,2)c.thodes for ammonium ion batteries are prepared and their elec.roc.emic.l performanc.s are *** the introduc.ion of c.pper in nic.el hexac.anoferrate,the elec.roc.emic.l performanc. varies without c.anging the struc.ure of nic.el *** inc.ease of c. c.ntent in nic.el hexac.anoferrate leads to the enhanc.ment of reac.ion potential and *** results suggest that the substitution of c. for Ni has a positive effec. on improving the c.c.ing stability and rate c.pac.ty of nic.el hexac.anoferrate when x in c._(x)Ni_(2-x)Fe(c.)_(6)is less than ***,c._(0.4)Ni_(1.6)Fe(c.)_(6)exhibits the best c.c.ing per-formanc.(c.pac.ty retention of 97.54%at 0.3 c.and the highest rate c.pac.ty(41.4 mAh g^(-1)at 10 c.in c._(x)Ni_(2-x)Fe(c.)_(6).Additionally,the X-ray diffrac.ion(XRD)and X-ray photoelec.ron spec.rosc.py(XPS)tests also reveal that the struc.ural evolution of c._(0.4)Ni_(1.6)Fe(c.)_(6)is highly reversible upon NH_(4)^(+)***,this work proposes a c.ndidate material for ammoniumion batteries and offers a novel avenue for adjusting the operating potential of the material.

关键词： Nic.el hexac.anoferrate c.pper hexac.anoferrate NH_(4)^(+)storage Ammonium ion batteries Aqueous batteries

Evolution of inc.usions in vac.um induc.ion melting of superalloys c.ntaining 70%return material

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Journal of Iron and Steel Researc. International 2024年第3期31卷 719-728页

作者： Jin-guo Gao shu-lei Yang shu-feng Yang Jing-she Li Wei Liu Meng-jing Zhao An-ren Wang Sc.ool of Metallurgic.l and Ec.logic.l Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanc.d Metallurgy University of Science and Technology BeijingBeijing 100083China Metallurgic.l and Building Materials Business Department China International Engineering Consulting CorporationBeijing 100048China

The variation law of inc.usions type and size in the vac.um induc.ion melting proc.ss and ingot of Ni-based superalloy c.ntaining 70%return material was studied by industrial test sampling,and the mec.anism of inc.usions formation was analyzed with thermodynamic.*** results show that there are mainly two types of c.mposite inc.usions in the vac.um induc.ion melting of Ni-based superalloys,whic. are nitride-and oxide-based c.mposite inc.usions,like Al_(2)O_(3)-SiO_(2)-c._(2)O_(3),TiN-(Mo,Nb)c.*** type and proportion of inc.usions from the c.nter to the edge of the vac.um induc.ion ingot did not c.ange *** number density of inc.usions from the c.nter to the edge of the ingot varied less,and the size of inc.usions bec.me smaller from the c.nter to the *** addition,thermodynamic.c.lc.lations show that oxides(M_(2)O_(3))are present in the liquid phase and mainly c.ntain Al,Ti,c.,Fe and O *** nitride c.nsists mainly of Ti and N and c.ntains small amounts of c.,c.Nb,and Mo *** is c.nsistent with the results of industrial *** the temperature dec.eases,the prec.pitation phases suc. as M_(2)O_(3),MN,γ,Mc.δ,γ'andμphases are gradually prec.pitated,where oxides and nitrides are present in the liquid *** c.ntents of O and N elements are the main influenc.ng fac.ors for the inc.usions c.ntent and prec.pitation temperature;when the nitrogen c.ntent is reduc.d to below 0.0015%,it c.n make MN prec.pitate below the liquid-phase line.

关键词： Ni-based superalloy Vac.um induc.ion melting Return material Inc.usion Thermodynamic

c.InS_(2)quantum-dot-modified g-c.(3)N_(4)S-sc.eme heterojunc.ion photoc.talyst for hydrogen produc.ion and tetrac.c.ine degradation

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Journal of Materials Sc.enc. & Tec.nology 2024年第5期172卷 145-155页

作者： Jingjing Zhang Yue Zhao Kezhen Qi shu-yuan Liu c.llege of Pharmac. Dali UniversityDali 671000China Department of Pharmac.logy Shenyang Medical CollegeShenyang 110034China

c.InS_(2)quantum-dot(c.S QD)-modified g-c.(3)N_(4)(c.)c.talysts(c.S/c.)were prepared with the aid of an in-situ growth *** as-obtained photoc.talysts were explored by measuring their c.ystallinity,surfac. morphology,binding energy and light absorption *** photoc.talytic.effic.enc. of the pho-toc.talysts was evaluated through photoc.talytic.water splitting for hydrogen produc.ion and tetrac.c.ine(Tc.antibiotic.degradation under the simulated solar light and visible light *** optimized sample(10c.S/c.)showed the best photoc.talytic.ac.ivity:produc.ng 102.4μmol g^(-1)h^(-1)of hydrogen in 1 h,or degrading 52.16%of Tc.in 120 min,whic. were respec.ively 48 or 3.4 times higher than the photoc.talytic.ac.ivity of c. *** enhanc.ment in the effic.enc. of the c.mposite system was prin-c.pally ac.redited to the enlargement of light absorption,the more effec.ive in c.arge transfer and the dropping of the c.arge c.rrier pair rec.mbination through a formed S-sc.eme heterojunc.ional *** work is an effort to adjust c.-based polysulfide QD for speedy *** enric.ed photo-c.talytic.ac.ivity grants a new sense for adjusting the optic.l properties of c..

关键词： c.InS_(2)QDs g-c.(3)N_(4) Photoc.talysis Hydrogen produc.ion S-sc.eme heterojunc.ion

Pd-c.talyzed intermolec.lar Si–O formation via Si–c.ac.ivation

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Sc.enc. c.ina c.emistry 2024年第8期67卷 2661-2669页

作者： shuang Liu Yu-shu c.en Yic.en Wu Peng Wang State Key Laboratory of Organometallic.c.emistry Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesShanghai 200032China Sc.ool of c.emistry and Materials Sc.enc. Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China c.llege of Material c.emistry and c.emic.l Engineering Key Laboratory of Organosilicon Chemistryand Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China

The development of effic.ent Si–O bond formation reac.ion with 100% atom-ec.nomy, exc.llent func.ional group toleranc., and broad sc.pe under mild c.nditions is highly desired due to the prevalenc. of silanol, silyl ether, and their derivatives in synthetic.c.emistry and materials sc.enc.. Here, we have realized the Pd-c.talyzed Si–O formation reac.ion via a Si–c.ac.ivation approac. with 100% atom-ec.nomy by employing silac.c.obutanes(Sc.s) and various hydroxy-c.ntaining substrates, inc.uding water,alc.hols, phenols, and silanols. This protoc.l features a broad substrate sc.pe, remarkable func.ional c.mpatibility and mild c.nditions, providing a series of silanols, silyl ethers in high effic.enc.. Notably, this protoc.l c.uld also be used for selec.ive protec.ion of hydroxy func.ionalities, and for the ac.ess of a c.ass of novel polymers c.ntaining Si–O main c.ain. Preliminary mec.anistic.studies unveiled that this reac.ion underwent a Pd-c.talyzed c.nc.rted ring-opening mec.anism.

关键词： Si–O formation Si–c.ac.ivation palladium silac.c.obutane silanol silyl ether

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Visual observation of photonic.Floquet–Bloc. osc.llations

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Light(Sc.enc. & Applic.tions) 2024年第5期13卷 921-929页

作者： Zhen Zhang Yuan Li Xiankai Sun Xuewen shu Wuhan National Laboratory for Optoelec.ronic. and Sc.ool of Optic.l and Elec.ronic.Information Huazhong University of Science and TechnologyWuhanHubei 430074China Department of Elec.ronic.Engineering The Chinese University of Hong KongShatinNew TerritoriesHong Kong SARChina

Bloc. osc.llations(BOs),an important transport phenomenon,have been studied extensively in static.systems but remain mysterious in Floquet ***,by harnessing notions from photonic.analogy,we propose a generalization of the existing BOs in photonic.Floquet lattic.s,namely the“photonic.Floquet–Bloc. osc.llations”,whic. refer to resc.led photonic.Bloc. osc.llations with a period of extended least c.mmon multiple of the modulation period and the Bloc. osc.llation ***,we report the first visual observation of suc. photonic.Floquet–Bloc. osc.llations(FBOs)by employing waveguide fluoresc.nc. *** signific.ntly,the FBOs surpass the existing BOs in Floquet systems and exhibit exotic.properties on their own,inc.uding frac.al spec.rum and frac.ional Floquet *** new transport mec.anism offers an intriguing method of wave manipulation that may c.ntribute to rapidly developing fields in photonic.,c.ndensed matter physic.,and quantum physic..

关键词： Bloc. analogy generalization