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Rhodamine 6G-doped polymer optical fiber amplifiers

Chinese Optics Letters 2004年第2期2卷 67-68页

作者：郑志强梁浩明海张其锦喻远琴刘世林张运生谢建平 Department of Physics University of Science and Technology of China Hefei 230026 Department of Physics Fujian Normal University Fuzhou 350007 Structure Research Laboratory and Department of Material Science and Engineering University of Science and Technology of China Hefei 230026 Department of Chemical Physics University of Science and Technology of China Hefei 230026

Rhodamine 6G-doped step-index polymer optical fiber is fabricated. The characteristics of the amplification of rhodamine 6G-doped step-index polymer optical fiber amplifier have been studied. The high-gain optical amplification with a tunable wavelength range from 585 to 613 nm is obtained in a step-index polymer optical fiber doped with rhodamine 6G at 10-ppm level, which can be used for broadband amplifiers and tunable lasers.

关键词： Broadband amplifiers Light amplifiers

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异丙醇分子C-H伸缩振动区域新的光谱标识

异丙醇分子C-H伸缩振动区域新的光谱标识

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第十三届全国化学动力学会议

作者：喻远琴王钰熙林珂胡乃银周晓国刘世林安徽大学物理与材料科学学院合肥微尺度物质科学国家实验室中国科学技术大学化学物理系

＜正＞利用偏振的光声拉曼光谱与常规的自发拉曼散射技术,测量了气相和液相异丙醇分子C-H伸缩振动区域内（2800～3100cm-1）的振动光谱。借助同位素样品分子的取代作用,我们发现了异丙醇分子内CH和CH3基团重要的重叠光谱特征。结合退偏...

＜正＞利用偏振的光声拉曼光谱与常规的自发拉曼散射技术,测量了气相和液相异丙醇分子C-H伸缩振动区域内（2800～3100cm-1）的振动光谱。借助同位素样品分子的取代作用,我们发现了异丙醇分子内CH和CH3基团重要的重叠光谱特征。结合退偏北的精确测量以及量子化学理论计算,我们重新归属了异丙醇分子上述范围内的振动光谱,澄清了以往光谱归属上的错误,为异丙醇分子今后的研

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C-H...O interaction in methanol-water solution revealed from Raman spectroscopy and theoretical calculations

C-H...O interaction in methanol-water solution revealed from...

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第十五届全国化学动力学会议

作者：喻远琴 Wei Fan Yuxi Wang Xiaoguo Zhou Shilin Liu Department of Physics Anhui University Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical PhysicsUniversity of Science and Technology of China

Hydrogen bond,as the most common weak interaction in molecules,plays an important role in physical,chemical,and biological *** addition to the conventional hydrogen bond,an unusual class of C-H...Y hydrogen bond termed with "improper blue-shifted hydrogen bond" has attracted much attention in recent *** this paper,we investigated the origin of blue shift of CH stretching vibration in methanol-water mixture by temperature-dependent Raman spectroscopy and quantum chemistry *** on the spectral response to temperature and the calculated structures for methanol-（water）_n（n=1-4） clusters,we provide clear experimental evidence that the weak C-H...O interaction coexists with conventional O-H...O hydrogen bond in methanol-water solution and play a role in the determination of C-H blue ***,the temperature-dependent measurements of methanol-water mixtures in both C-H and O-H stretching regions reveal that the C-H...O interaction behaves differently from the conventional O-H...O hydrogen bond upon the temperature *** former is enhanced whereas the latter is *** results will shed new light to the nature of C-H...O interaction and be helpful to understand hydrophilic and hydrophobic interactions of amphiphilic molecules in different environments.

关键词： C-H...O interaction O-H...O hydrogen bond methanol-water solution temperature-dependent Raman spectroscopy

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Structural features of liquid DMSO from temperature-dependent Raman spectroscopy and theoretical calculations

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Chinese Journal of Chemical Physics 2024年第6期37卷 763-768,I0008-I0010,I0041,I0042页

作者： Hongyuan Shen Ning Chen Ao You Yuanqin Yu Xiaoguo Zhou Rui Zhang Shilin Liu School of Physics and Optoelectronic engineering Anhui UniversityHefei 230601China Hefei National Laboratory for Physical Sciences at the Microscale iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026China

Dimethyl sulfoxide(DMSO)plays an important role in chemistry,biology and *** S=O stretching vibration serves as a sensitive probe of its structure under different chemical ***,spectral assignment for the S=O stretching vibration of liquid DMSO remains unclear due to the interference of CH_(3)antisymmetric rocking and different aggregates,leading to the confusion in explaining the microstructures of liquid ***,the S=O stretching spectra in pure DMSO and in extremely diluted CCl_(4)solution were investigated with temperaturedependent Raman *** is shown that CH_(3)antisymmetric rocking does not significantly interfere with the S=O band profile due to its low Raman *** decomposed peaks at 1027,1042 and 1055 cm^(-1)in liquid DMSO show obviously different intensity variety upon the temperature *** with quantum chemistry calculation on(DMSO)_(n)(n=1-4)clusters,Raman spectra in the S=O stretching region were assigned and the simultaneous presence of the monomer,dimer and trimmer in liquid DMSO were *** results contribute to a more detailed molecular understanding of the structure of DMSO in the liquid state.

关键词： Structural property Liquid DMSO Temperature-dependent Raman spectroscopy

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