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805 results on '"Nie Qiuhua"'

153. Ultra‐large mode area mid‐infrared fiber based on chalcogenide glasses extrusion

Author

Zhong, Minghui, primary, Liang, Xiaolin, additional, Xiao, Jing, additional, Wu, Guolin, additional, Jiao, Kai, additional, Wang, Xiange, additional, Xu, Tiesong, additional, Liu, Jia, additional, Zhao, Zheming, additional, Wang, Xunsi, additional, Wang, Rongping, additional, Zhou, Yaxun, additional, Zhang, Peiqing, additional, Liu, Yongxing, additional, and Nie, Qiuhua, additional

Published
2020
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154. Low-Loss Chalcogenide Fiber Prepared by Double Peeled-Off Extrusion

Author

Zhong, Minghui, primary, Liang, Xiaolin, additional, Jiao, Kai, additional, Wang, Xiange, additional, Si, Nian, additional, Xu, Tiesong, additional, Xiao, Jing, additional, Liu, Jia, additional, Yang, Peilong, additional, Zhao, Zheming, additional, Wang, Xunsi, additional, Wang, Rongping, additional, Zhou, Yaxun, additional, Zhang, Peiqing, additional, Liu, Yongxing, additional, and Nie, Qiuhua, additional

Published
2020
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161. Ultra-high germanium-contained Se-chalcogenide glass fiber for mid-infrared

Author

Liang, Xiaolin, primary, Jiao, Kai, additional, Wang, Xiange, additional, Si, Nian, additional, Xu, Tiesong, additional, Zhong, Minghui, additional, Zhao, Zheming, additional, Wang, Xunsi, additional, Liu, Jia, additional, Zhang, Peiqing, additional, Liu, Yongxing, additional, Nie, Qiuhua, additional, and Wang, Rongping, additional

Published
2020
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162. Rib chalcogenide glass waveguide with simultaneous dispersion flatting for both transverse electric and magnetic modes

Author

Xiang Shen, Peipeng Xu, Nie Qiuhua, Yuxiu Shi, and Zenghui Yu

Subjects
Materials science, business.industry, Bandwidth (signal processing), Chalcogenide glass, 02 engineering and technology, Polarization (waves), 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, 010309 optics, Transverse plane, 020210 optoelectronics & photonics, Optics, law, Polarization mode dispersion, 0103 physical sciences, Broadband, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, business, Dispersion (chemistry), Waveguide
Abstract

A rib chalcogenide glass waveguide with simultaneous dispersion engineering for both fundamental quasi-TE mode and quasi-TM mode is numerically demonstrated. Dispersions of approximately ±100 ps/nm/km over a 4200-nm bandwidth for the quasi-TE mode and of approximately ±120 ps/nm/km over a 2350-nm bandwidth for the quasi-TM mode are observed. Dispersion design for both polarizations can be independently realized by tuning the structural parameters. Moreover, this waveguide can support broadband FWM processes and have potential applications from near-infrared to middle-infrared region based on the polarization effect.

Published
2017

167. 基于挤压技术的新型七芯超大数值孔径硫系玻璃光纤制备及其光学性能研究

Author

吴国林 Wu Guolin, 冯赞 Feng Zan, 汪俊 Wang Jun, 汪金晶 Wang Jinjing, 钟明辉 Zhong Minghui, 徐铁松 Xu Tiesong, 梁晓林 Liang Xiaolin, 肖晶 Xiao Jing, 王弦歌 Wang Xiange, 焦凯 Jiao Kai, 赵浙明 Zhao Zheming, 王训四 Wang Xunsi, 张培晴 Zhang Peiqing, 刘永兴 Liu Yongxing, 戴世勋 Dai Shixun, and 聂秋华 Nie Qiuhua

Subjects
Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2021

171. Extruded seven-core tellurium chalcogenide fiber for mid-infrared

Author

Wang, Xiange, primary, Jiao, Kai, additional, Si, Nian, additional, Zhong, Minghui, additional, Zhao, Zheming, additional, Wang, Xunsi, additional, Jia, Liu, additional, Xue, Zugang, additional, Zhang, Peiqing, additional, Liu, Yongxing, additional, Dai, Shixun, additional, Nie, Qiuhua, additional, and Wang, Rongping, additional

Published
2019
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177. Mid-infrared flattened supercontinuum generation in all-normal dispersion tellurium chalcogenide fiber

Author

Jiao, Kai, primary, Yao, Jinmei, additional, Zhao, Zheming, additional, Wang, Xiange, additional, Si, Nian, additional, Wang, Xunsi, additional, Chen, Peng, additional, Xue, Zugang, additional, Tian, Youmei, additional, Zhang, Bin, additional, Zhang, Peiqing, additional, Dai, Shixun, additional, Nie, Qiuhua, additional, and Wang, Rongping, additional

Published
2019
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181. Ultra‐large mode area mid‐infrared fiber based on chalcogenide glasses extrusion.

Author

Zhong, Minghui, Liang, Xiaolin, Xiao, Jing, Wu, Guolin, Jiao, Kai, Wang, Xiange, Xu, Tiesong, Liu, Jia, Zhao, Zheming, Wang, Xunsi, Wang, Rongping, Zhou, Yaxun, Zhang, Peiqing, Liu, Yongxing, and Nie, Qiuhua

Subjects
CHALCOGENIDE glass, INFRARED lasers, NUMERICAL apertures, FIBERS, OPTICAL losses
Abstract

We have prepared an ultra‐large core, high numerical aperture (NA) chalcogenide (ChG) step‐index fiber (SIF) with a mode area of >43 600 μm2 at the wavelength of 5.5 μm by an improved extrusion method. The fiber based on two ChG glasses with similar softening temperature has a core diameter of 339.0 μm and ultra‐thin cladding. The fiber exhibits a minimum loss of 1.75 dB/m at 9.74 μm and an optical loss of <5.0 dB/m from 5.3 to 10.8 μm. Broadband supercontinuum (SC) covering from 1.2 μm to 13.7 μm has been generated in a 17‐cm‐long ultra‐large mode area fiber with large core and high NA. All these show that, the fiber possesses the potential for high‐power infrared laser transmission. [ABSTRACT FROM AUTHOR]

Published
2021
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182. Research on the Fabrication and Optical Properties of New Far-infrared Suspended-core Te-fiber

Author

Liang Xiaolin, Jiao Kai, Zhang Peiqing, Xiao Jing, Xu Tiesong, Si Nian, Liu Jia, Zhao Zheming, Dai Shi-Xun, Liu Yongxing, Wang Xian-ge, Zhong Minghui, Nie Qiuhua, and Wang Xunsi

Subjects
Core (optical fiber), Materials science, Fabrication, Far infrared, business.industry, Optoelectronics, Fiber, business, Atomic and Molecular Physics, and Optics
Published
2019

183. Preparation of Wide-Band Gap Ge-Se Chalcohalide Glass and Its Fiber Properties

Author

戴世勋 Dai Shixun, 司念 Si Nian, 聂秋华 Nie Qiuhua, 赵浙明 Zhao Zheming, 田优梅 Tian Youmei, 王训四 Wang Xunsi, 焦凯 Jiao Kai, 薛祖钢 Xue Zugang, 王弦歌 Wang Xiange, and 陈朋 Chen Peng

Subjects
Materials science, business.industry, Wide-bandgap semiconductor, Optoelectronics, Fiber, business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials
Published
2019

184. Nanocrystallization of lead‐free Cs3Sb2Br9 perovskites in chalcogenide glass.

Author

Long, Nengbing, Lin, Changgui, Chen, Feifei, Jiao, Qing, Liu, Xueyun, and Nie, Qiuhua

Subjects
CHALCOGENIDE glass, CRYSTAL growth, GLASS-ceramics, DISCONTINUOUS precipitation, CRYSTALLIZATION, NATURE
Abstract

Lead‐free halide perovskite nanocrystals (HPNCs) are an emergent alternative of lead‐based halide perovskites owing to their environmentally benign nature. In this work, lead‐free Cs3Sb2Br9 HPNCs were precipitated firstly in chalcogenide glass through an elaborated composition design and appropriate crystallization process. The microstructural evolution and nanocrystallization behavior of the Cs3Sb2Br9 crystallized glass‐ceramics were analyzed by employing advanced characterization techniques. It is revealed that the crystallization process is temperature‐dependent and can be described as two stages. At the first crystallization stage, the nucleation and crystal growth of Cs3Sb2Br9 HPNCs occur due to the presence of structural similarity of [Sb2Br9]3− dioctahedral clusters in the precursor glass. And then the second crystalline phase of GeS2 is successively separated from the residual glassy matrix under high‐temperature treatment. This work should be of great guiding significance for developing novel glass‐ceramic materials embedded with lead‐free HPNCs. [ABSTRACT FROM AUTHOR]

Published
2020
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194. New far-infrared transmitting Te-based chalcogenide glasses.

Author

Wang, Guoxiang, Nie, Qiuhua, Wang, Xunsi, Shen, Xiang, Chen, Fen, Xu, Tiefeng, Dai, Shixun, and Zhang, Xianghua

Subjects
*TELLURIUM, *HALIDES, *CRYSTALLIZATION, *CHALCOGENIDES, *INORGANIC compounds
Abstract

This study reports on the synthesis of tellurium-based glasses that have a wide transmission far beyond the second atmospheric window. Several far-infrared(IR) transmitting glass systems including Ge-In-Te, Ge-Ga-Te, as well as some compositions containing alkali halides (KI, CsI) or metal halides (PbI2, CuI, AgI, CdI2 or ZnI2) are reported. Their glass-forming ability, thermal stability, and IR transmitting property are investigated. The results show that the broad absorption peak in the 15-20 μm disappear in the Fourier-transform infrared (spectrometer) spectra when gallium is replaced by indium. Te-based chalcogenide glasses containing metal-halides show superior glass-forming ability and better thermal stability than those containing alkali halides. Among these glasses, the ΔT of glass composition 65GeTe4-17In2Te6-18AgI can be as great as 115 °C. In ternary system, the glass composition Ge16Te69(AgI)15 (ΔT = 120 °C) is stable enough toward crystallization in combination with broad transmission region and good chemical durability to be drawn into optical fibers. [ABSTRACT FROM AUTHOR]

Published
2011
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197. Heat-release package design and analysis of high-power white LED down light

Author

聂秋华 Nie Qiuhua, 周伯友 Zhou Boyou, 白坤 Bai Kun, 马湘君 Ma Xiangjun, 戴世勋 Dai Shixun, and 吴礼刚 Wu Ligang

Subjects
Materials science, business.industry, Nuclear engineering, Test point, Thermal management of electronic devices and systems, Temperature testing, Atomic and Molecular Physics, and Optics, law.invention, LED lamp, law, Package design, Heat transfer, Optoelectronics, business
Abstract

An encapsulation structure of high-power white LED lighting lamps is designed.The temperature field distributions of steady-state operation are analyzed by using calculation and analysis of ANSYS finite element.The temperature of test point on device is 76.0℃,and the temperature of radiator shell is 71.0℃ which are obtained by the temperature testing experiment.Based on the concordance between simulation result and experiment value,a new cooling encapsulating structure is revealed.An effective basis is provided for optimization scheme of high power LED heat dissipation through considering the temperature field distributions of components of lamps and heat transfer theory.

Published
2012

199. Effect of Silver Nanoparticles on Spectroscopic Properties of Er3+-doped Bismuth Glass

Author

徐铁峰 Xu Tiefeng, 林常规 Lin Changgui, 陈飞飞 Chen Feifei, 吴一 Wu Yi, 沈祥 Shen Xiang, 张巍 Zhang Wei, 戴世勋 Dai Shixun, 聂秋华 Nie Qiuhua, 宋宝安 Song Baoan, and 王训四 Wang Xunsi

Subjects
Radiation, Materials science, Nanocomposite, Doping, Analytical chemistry, chemistry.chemical_element, Condensed Matter Physics, Fluorescence, Silver nanoparticle, Electronic, Optical and Magnetic Materials, Bismuth, Ion, chemistry, Surface plasmon resonance, Mass fraction
Abstract

A serial of Er3+∶Ag-bismuth glass nanocomposites were prepared by the conventional melting-quenching method.The effect of nano-silver addition on the emission intensity of Er3+ was investigated.The experimental results indicate that Ag nanoparticles of mass fraction of 0.2% drastically enhances the intensity(~4.6 times) of 1.53 μm emission bands of Er3+.Local field enhancement induced by Ag0 surface plasmon resonance(SPR) and energy transfer from fluorescent Ag0→Er3+ ions are found to be responsible for this enhancement.

Published
2011

200. Luminescence and Mechanism of Energy Transfer of Er3+/Tm3+-codoped Ga5Ge20Sb10S65Glass

Author

沈祥 Shen Xiang, 黄正裕 Huang Zheng-yu, 王训四 Wang Xunsi, 徐铁峰 Xu Tiefeng, 戴世勋 Dai Shixun, 林常规 Lin Changgui, and 聂秋华 Nie Qiuhua

Subjects
Radiation, Materials science, Chemical physics, Energy transfer, Condensed Matter Physics, Luminescence, Mechanism (sociology), Electronic, Optical and Magnetic Materials
Published
2011

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