搜索结果: 1-15 共查到“光学仪器及技术 Raman”相关记录15条 . 查询时间(0.14 秒)
Temperature Dependence of the Raman Intensity and the Bandwidth Close to the Order-Disorder Phase Transition in NaNO3
Raman Intensity Bandwidth NaNO3
2013/1/30
We analyze the temperature dependence of the Raman intensity using the experimental data according to a power-law formula close to the order-disorder transition (Tc = 549 K) in NaNO 3. From this analy...
检测了地塞米松磷酸钠和倍他米松磷酸钠两种差向异构体的红外光谱(FTIR), 固体和饱和溶液的常规拉曼光谱(NRS)及以银胶为基底的表面增强拉曼光谱(SERS)。通过红外和拉曼光谱的结合，对其各基团的振动模式进行解析，并对峰进行归属和比较。结果表明：两种物质的主要区别是地塞米松磷酸钠的CH3非对称伸缩振动和对称面内变形振动的拉曼位移较大;依据SERS作用机理和规律，推测两种物质在银胶上主要是通过P—...
研究和发展了一种将微区拉曼(Raman)光谱检测与原子力显微镜(AFM)微纳米扫描成像相结合的新型Raman-AFM技术。设计了Raman光谱与AFM扫描成像的原位检测探头;研制出相应的Raman-AFM系统;利用该系统，对ZnO纳米颗粒和TiO2纳米薄膜开展了微区Raman光谱与微纳米结构的检测实验。研究表明，所获得的Raman光谱检测结果与理论值良好吻合，同时，AFM扫描检测得到的图像很好地表...
合肥上空大气二氧化碳Raman激光雷达探测研究
大气光学 Raman激光雷达 大气CO2体积混合比 合肥
2012/12/12
Raman激光雷达是用于大气成分探测与特性研究的有效工具.介绍了中科院安徽光学精密机械研究所自行研制的一台用于测量低对流层大气CO2时空分布的Raman激光雷达系统,并进行了一系列观测实验和对比分析.系统选用波长355 nm的紫外激光作为光源,利用光子计数卡双通道采集大气中N2和CO2的Raman后向散射信号与Li-7500型H2O/CO2分析仪进行对比标定,通过反演获得了大气CO2水平与垂直方向...
Characterization of Short PM Raman Fiber Lasers with a Small Spectral Bandwidth
Characterization Short PM Raman Fiber Lasers Small Spectral Bandwidth
2015/5/20
Linearly polarized Raman fiber lasers using 3 m and 6 m of a novel fiber are discussed. Experimental and theoretical results for output powers at watt levels and spectral widths in the 0.1 nm range ar...
AlN纳米线高压相变的Raman光谱特征
AlN纳米线 结构相变 高压Raman光谱
2011/5/17
利用金刚石对顶砧(DAC)技术和显微Raman光谱原位测量技术，在0～33.1 GPa压力范围对AlN纳米线进行了高压相变研究。在24.4 GPa附近，A1(LO)振动模式呈现出较大的非对称性宽化的特征，表明发生了六角纤锌矿到立方岩盐矿的结构转变。岩盐矿结构AlN纳米线的无序声子散射导致了高压相的Raman散射信号。卸压后，高压相的Raman光谱特征被保留下来。根据纤锌矿结构AlN纳米线的振动模式...
Inter-Wavelength Transfer of Digital Lightpath Labels Induced by Stimulated Raman Scattering
Fiber optics links and subsystems All-optical networks Fiber optics communications Nonlinear optics fibers
2015/6/4
WDM systems using digital lightpath labels can experience modulation transfer among wavelengths due to stimulated Raman scattering (SRS), creating label replicas. We present pump-probe measurements of...
偏磷酸钙玻璃陶瓷的Raman光谱分析
偏磷酸钙 玻璃陶瓷 Raman光谱
2011/4/29
测量了Ca/P摩尔比为0.45的偏磷酸钙玻璃及其在300～700 ℃下结晶化处理获得玻璃陶瓷的拉曼光谱，对谱峰的振动模式进行了指认，利用拉曼振动频率计算了P—O键长。光谱分析发现偏磷酸钙玻璃在300 ℃已经开始了结晶相变，不同温度下，νs(PO2)和νs(POP)谱带的振动频率基本不变，随着温度提高，谱峰强度增加，并出现了精细的指纹结构;玻璃陶瓷的表面和内部的结构不同，表面结晶化程度高于内部;结晶...
溅射工艺参数对硅薄膜微结构影响的Raman分析
碳化硅反射镜 硅薄膜 磁控溅射 拉曼散射
2011/4/25
为了解决碳化硅难以进行光学加工的问题，该文采用射频磁控溅射方法，在碳化硅反射镜坯体上沉积与碳化硅具有相近热膨胀系数且易于进行光学加工的硅薄膜。利用拉曼光谱(Raman)对衬底温度、射频功率、衬底偏压等溅射工艺条件对硅膜微结构的影响进行了分析。研究发现：随着衬底温度的升高，薄膜的晶化率先增大后减小;衬底偏压的增加不利于薄膜有序结构的形成;射频功率对薄膜微结构的影响比较复杂，随着功率的升高，薄膜晶粒尺...
Broadband,Spectrally Controlled Raman-active Attenuator
Broadband Spectrally Controlled Raman-active Attenuator
2015/7/16
We present numerical investigations on a broadband Raman-active attenuator using a WDM-scheme of control signals. It is shown to hold a feasible control characteristic for mitigation of residual trans...
Development of Coherent Anti-Stokes Raman Scattering Microscopy
Nonlinear spectroscopy Ultra-fast laser Raman spectroscopy microscopy
2009/6/12
New multiphoton microscopy using CARS (Coherent Anti-Stokes Raman Scattering) spectroscopy is described. In CARS microscopy, the image of molecular vibration that is sensitive to the molecular spices ...
Trace Methane Detection Based on Raman Spectroscopy Using a High Finesse Optical Resonator
Raman spectroscopy Methane detection Gas sensor
2009/6/8
A Raman spectroscopy-based gas sensor employing a high-finesse simple diode laser pumped external cavity, Power Build-up Cavity (PBC), has been developed. Results show that a compact 10-cm-long PBC in...
用过滤阴极真空电弧沉积系统制备掺N非晶金刚石(ta-C∶N)薄膜，通过在阴极电弧区和沉积室同时通入N2气实现非晶金刚石薄膜的N原子掺杂，并通过控制N2气流速制备不同N原子含量的ta-C∶N薄膜。用X射线光电子能谱(XPS)和Raman光谱分析N含量对ta-C∶N薄膜微观结构的影响。XPS分析结果显示：当N2气流速从2 cm3·min-1增加到20 cm3·min-1时，薄膜中N原子含量从0.84 ...
New materials and devices in Raman amplification
New materials devices Raman amplification
2015/7/30
At present for the creation of Raman lasers and amplifiers for numerous applications various glass optical fibers and crystals are mainly used. In recent years silicon photonics technology has made ra...