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| 1 | Single whispering-gallery mode lasing in polymer bottle microresonators via spatial pump engineering显示文摘Single-mode lasing in whispering-gallery mode(WGM)microresonators is challenging to achieve.In bottle microresonators,the highly non-degenerated WGMs are spatially well-separated along the long-axis direction and provide mode-selection capability.In this work,by engineering the pump intensity to modify the spatial gain profiles of bottle microresonators,we demonstrate a simple and general approach to realizing single-mode WGM lasing in polymer bottle microresonators.The pump intensity is engineered into an interference distribution on the bottle microresonator surface.By tuning the spacing between axial positions of the interference pump patterns,the mode intensity profiles of single-bottle WGMs can be spatially overlapped with the interference stripes,intrinsically enabling single-mode lasing and selection.Attractive advantages of the system,including high sidemode suppression factors 420 dB,large spectral tunability 48 nm,low-lasing threshold and reversible control,are presented.Our demonstrated approach may have a variety of promising applications,ranging from tunable single-mode lasing and sensing to nonlinear optics. | Fuxing Gu Fuming Xie Xing Lin Shuangyi Linghu Wei Fang Heping Zeng Limin Tong Songlin Zhuang | 2017 | Light(Science & Applications)2017，6，1： | 17 |
| 2 | Single-mode lasing via loss engineering in fiber-taper-coupled polymer bottle microresonators显示文摘Due to the lack of mode selection capability, single whispering-gallery-mode(WGM) lasing is a challenge to achieve. In bottle microresonators, the highly nondegenerated WGMs are spatially well-separated along the long-axis direction and provide mode selection according to their axial mode numbers. In this work, we use a loss-engineering approach to suppress the higher-order WGMs and demonstrate single-mode lasing emission in small polymer bottle microresonators. The fiber tapers are not only used to couple pump light into the bottle microresonators to excite the WGMs but also to bring optical losses that are induced from the diameter mismatch between fiber tapers and microresonators. By adjusting the coupling positions, the diameters of fiber tapers, and the coupling angles, single fundamental-mode lasing is efficiently generated with side-mode suppression factors over 15 dB. Our loss-engineering approach is convenient just by moving the fiber taper and may findpromising applications in miniature tunable single-mode lasers and sensors. | FUMING XIE NI YAO WEI FANG HAIFENG WANG FUXING GU SONGLIN ZHUANG | 2017 | Photonics Research2017，5，6： | 4 |
| 3 | Characteristics of Amorphous Mn_3AlC Phases Formed by Mechanical Milling显示文摘Amorphization of Mn carbides by rapid quenching method has been proved to be unsuccessful.By mechanical milling in the present work, amorphous phases have been formed in the perovskitetype Mn3AlC compound. The transformation process from crystalline to amorphous phase was found to be milling time controlled, and 10 h is a critical period for the macroscopically single amorphous phase to form. It has been clarified that the redistribution of C atoms is an instinctive factor for amorphous phase to nucleate, and the atomic configuration in the amorphous phase is changed much in longer milling that different crystallizing behaviours have been caused. With X-ray diffraction and differential scanning calorimetry (DSC) results, an atomic configuration transition model is considered for the structures of the amorphous phases changed during milling. | Fuxing YIN Nanju GU (Hebei Institute of Technology, Tianin 300132, China)T.Shigematsu N.Nakanishi(Faculty of Science, Konan University Kobe 658, Japan)Y.Osawa A.Sato(National Research Institute of Metals, Tsukuba 305, Japan) | 1997 | Journal of Materials Science & Technology1997，13，2： | 0 |
| 4 | Electron Microscopy Analysis of Deformation Induced ε Martensite Transformation in an Fe-Mn-Si-Cr-Ni Alloy显示文摘The configurations of stacking faults and morphologies of strain induced ε martensite plates in an FeMnSiCrNi alloy were investigated through electron microscopy analysis. The Shockley partial dislocation structures. sensitive to external stress. determine the configurations of stacking faults in γphase Partial dislocations at the front sides of stacking faults are usetul for the nucleation of εmartensite plates. The growth of ε martensite plates is accompanied with the disappearance of local pre-existing stacking faults, The ε martensite vanants behave in three morphologies of respective stopping. continuous penetrating and intersections with the formation of secondary ε martensite | Fuxing YIN Jianxin ZHANG Ruixiang WANG and Nanju GU (Hebei Institute of Technology, Tianjin, 300132, China)(To whom correspondence should be addressed)Kenichi Shimizu (Kanazawa Institute of Technology, Ishikawa, Japan) | 1994 | Journal of Materials Science & Technology1994，10，4： | 0 |
| 5 | Research and Analysis of Regional Ecological Positioning in Planning Environmental Impact Assessment显示文摘The regional ecological positioning of one area is based on the region’s ecological orientation by the country or a larger region.Combined with the region’s natural geographical features,ecological background,main ecological problems,regional ecological structure,pattern,process,function and service,etc.,the position of a certain area in ecological space,structure,process,function and service,etc.is determined through the analysis and research.Regional ecological positioning is an important prerequisite and core basis for regional ecological impact assessment.However,in the current regional ecological impact assessment,most of them have not analyzed and studied the regional ecological positioning.Due to the lack of research on regional ecological positioning,it is rare to apply the research results of regional ecological positioning to the establishment of regional ecological objectives and the construction of index system.Regional ecological positioning does not guide the direction of regional ecological protection and construction well,and there is a general tendency of regional ecological positioning being one-sided and slogan-based.This paper analyzes the necessity and importance of research of regional ecological positioning,puts forward the technology framework of study on regional ecological positioning.With regional ecological positioning research in planning ecological impact assessment of the Chengdu-Chongqing Economic Zone as an example,how to carry out the study on the regional ecological positioning and how to apply the results of the study on the regional ecological positioning in regional ecological impact assessment are explained and illustrated. | Jianqiao QIN Donghang JIANG Fuxing GU Meng HU Rongjin YANG Yingli JIE Zeming ZHENG Haojia XU Xiaoxiao LIAO | 2022 | Meteorological and Environmental Research2022，13，5： | 0 |
| 6 | Effect of Austenite Pre-deformation on Isothermal Martensite Transformation in an Fe-20.5Ni-4.8Mn Alloy显示文摘With electron microscopy the investigation on isothermal martensite transformation in an Fe20.5Ni-4.8Mn alloy has been carried out to clarify the effect of austenite state on the transformation, by applying pre-deformation to austenite before isothermal holding. Under the condition without pre-deformation, the isothermal martensite products are lath martensite with {111}fhabit planes. Dislocations in austenite seem to contribute to nucleation of martensite, and in this nascent Stage austenite substructure has no obvious effect on martensite growth. The consequent thickening of martensite laths is apparently influenced by local austenite states, resulting in the changes in orientation, morphology as well as substructure of martensite lath. The kinetics of isothermal martensite transformation is controlled by intedece dislocation determined nucleation of martensite in primary stage, but to a larger extent, by the austenite accommodation for the shape strain of martensite in the thickening | Fuxing YIN Jianxin ZHANG and Nanju GU(Hebei Institute of Technology, Tianjin, 300132, China)Tsukio Tadaki(Institute of Science and Industrial Research, Osaka University, Japan)Ken,ichi Shimizu(Kanazawa Institute of Technology, Ishigawa 921, Japan) | 1995 | Journal of Materials Science & Technology1995，11，1： | 0 |
| 7 | Structural Evolution of the Mn_(0.52)Sb_(0.48) Compound during High Energy Ball Milling显示文摘The structural transitions of the NiAs-type Mn0.52Sb0.48 magneto-ordered compound, ball milled to different periods, have been characterized by X-ray diffraction and DSC analysis. On the basis of lattice parameter results a structural evolution mode with three stages is proposed. In the first stage lattice parameters keep nearly unchanged with the refinement of grains and increase of lattice strain. In the second stage, microstrain shows a lowering tendency accompanying the successive decreases of grain size. The X-ray revealed internal strain is found to be strains inside the lattice, which can be relaxed with new grain formation. The change of Tc is shown to be affected by the dimension of c axis, however the overall magnetization is continuously decreased with milling, due to the disordering process occurred in milling. Correspondent disordering mechanisms have been tentatively postulated and discussed according to the changes of lattice para meters. | Fuxing YIn and Nanju GU (Dept. of Materials Science and Engineering, Hebei Institute of Technology, Tianjin 300130, China)T.Shigematsu and N.Naknishi (Dept. of Chemistry, Faculty of Science, Konan University, Kobe 658, Japan)(To whom correspondence should | 1996 | Journal of Materials Science & Technology1996，12，6： | 0 |
| 8 | EFFECT OF SELF-ACCOMMODATION FOR TWINNED MARTENSITE AND INVARIANT HABIT PLANE显示文摘The shear components of strain tensors for matrix and twin crystal of (?)winned martensite wereroughly opposite after calculation,and the strain energy would be reduced.The growth ofmartensitic plates along the normal direction of the twin plane may depend upon the effect ofself-accommodation between the matrix and twin crystals.Based upon the analysis on thedisplacement vectors of the normals for different habit planes,the{10,3,15}_f plane could formthe macroscopic invariant habit plane;but the(5(?)5)_f,(2(?)2)_f,and(1(?)1)_f planes aredifficult to become the invariant planes. | GU Nanju WANG Ruixiang YIN Fuxing Hebei Institute of Technology,Tianjin,China | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，6： | 0 |
| 9 | MORPHOLOGY OF MARTENSITE IN 7CrSiMnMoV STEEL AND ITS STRENGTH-TOUGHNESS显示文摘The morphology and substructure of martensites in 7CrS(?)MnMoV steel were observed underoptical or electron microscope,and martensitic transformation with its morphology was alsoanalysed.In the normally quenched steel three types of martensites are found,including thewide lath one of dislocation substructure formed preferentially along grain boundaries,thethinner inner laths and the twinning martensite plate in interior of grain.Therefore,an at-tempt was made to substitute lower bainite,formed by short-term isothermal quenching.forintergranular martensite,it is believed that the morphology would be very influential to thest(?)ength-toughness of the steel. | WANG Ruixiang GU Nanju YIN Fuxing Hebei Institute of Technology,Tianjin,China | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，6： | 0 |
| 10 | EFFECT OF TEMPERING IN PULSE MAGNETIC FIELD ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HIGH SPEED STEEL显示文摘Using a self-made pulse magnetic field heat treatment equipment with low or medium intensi-ty,the tempering process of high speed steel W6Mo5Cr4V2 was investigated.It was foundthat the secondary hardening process and the transformation of retained austenite for the steelwere accelerated by the pulse magnetic field,and the tempering period could be reduced tohalf of the original.It was shown by the analyses of X-ray and eletron microscopy that theprecipitation of carbides becomes more homogeneous and dispersive,and the tetragonality ofmartensite increases obviousely,which causes the improvement of hardness and red-hardnessfor the steel.It was confirmed that the service life of tools as centre bits,screw taps andpunches for nuts could be increased by 0.4 to 1.4 times by the tempering in magnetic field. | XU Bojun GU Nanju YAN Dianran YIN Fuxing Hebei Institute of Technology,Tianjin,China GU Nanju Division of Heat Treatment,Hebei Institute of Technology,Tianjin 300132,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，2： | 0 |
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