缅怀龚老一代“光纤人”,牢记使命,继续前进!纪念中国光学学会纤维光学与集成光学专业委员会成立36周年

20世纪50年代,光学纤维初问世之时,中国科学院学部委员龚祖同教授就敏锐地感觉到这种能"转弯抺角"传输光能的光纤是材料科技领域的一个重大革新!他决心在中国开展这方面的研究工作。1962年,龚老担任新成立的中国科学院西安光学精密机械研究所(后文简称"西安光机所")所长,立即组建了光学纤维研究室和光学玻璃研究组。     

空心阴极灯激发的微波等离子体炬原子/离子荧光光谱研究--钙的原子/离子荧光光谱

用强短脉冲供电技术的空心阴极灯作激发源、微波等离子体炬作原子／离子化器，建立了原子／离子荧光光谱实验装置。详细研究了微波等离子体功率、观察高度、空心阴极灯电流等因素对原子／离子荧光信号强度的影响，测量了系统对Ca的原子／离子荧光光谱的检出限。     

PREPARATION AND CATALYTIC ACTIVITY OF BIOACTIVE FIBERS

Two kinds of water-soluble metallophthalocyanines, binuclear cobalt phthalocyanine （Co2Pc2） and binuclear ferric phthalocyanine （Fe2Pc2）, were synthesized through phenylanhydride-urea route and characterized by elemental analysis and FT-IR spectra. Binuclear metallophthalocyanine derivatives （Mt2Pc2） were immobilized on silk fibers and modified viscose fibers to construct bioactive fibers of mimic enzyme. Mt2Pc2 was used as the active center of bioactive fibers, viscose and silk fibers as the microenvironments. The catalytic oxidation ability of bioactive fibers on the malodors of methanthiol and hydrogen sulfide was investigated at room temperature. The experimental results indicated that the catalytic activity of such bioactive fibers was closely correlative to the types ofbioactive fibers and substrates.     

能谱法和催化光度法测定无机纤维中铁含量的比较研究

本文研究了铁(Ⅲ)在酸性介质中催化抗坏血酸(Vc或H2A)还原4-硝基-3’-甲基-氨基偶氮苯的褪色反应,拟定了反应的最佳条件,探讨了反应机理,建立了催化动力学测定痕量铁的新方法,该方法的检出限为2.98×10~(-11)g·mL-1,线性范围为0-200 ng·(25 mL)-1。比较了X射线能量色散谱法和催化光度法在玄武岩纤维样品中铁含量的测定,结果误差为2.89％。     

采用空心阴极放电等离子体化学气相沉积方法制备a-CH薄膜

 研究了不同衬底-阴极距离、直流电压和H₂流量对a-CH薄膜沉积速率的影响。结果表明：衬底-阴极距离必须大于0.5cm，随着该距离的增加，薄膜的沉积速率减少；直流电压达550V时沉积速率最大；随着H2含量的增加，CH₄含量相对减少，沉积速率随之降低。用AFM观察了以该方法制得的448.4nm CH薄膜的表面形貌，表面粗糙度约为10nm。最后测出了不同条件下CH薄膜的UV-VIS谱，由此可以计算得到薄膜的禁带宽度及折射率。     

Fabrication of Zeolite A Rods with Irregular Macropores by Self-assembly of Zeolite A Microcrystals Using Microwave-assisted Hydrothermal Synthesis

Zeolite A rods by self-assembly of zeolite A microcrystal were successfully synthesized by microwave-assisted hydrotherrnal synthesis. The average size of zeolite crystals consisting of self-assembling materials was about 300 nm and the length of zeolite rods was in the range of 15--30μm.     

Controlling the gain shape of Er^3＋—doped fluorozirconate fibre amplifier by a coherent field

We proposed a four-level system to explore the quantum interference effects on optical amplification.We found that the gain of the probe.including positions and values of gain peaks,can be adjusted by changing the coherent field and the incoherent pumping.At the same time,we can also modify the absorption profile of electromagnetically induced transparency by the incoherent pump.The results provide a method to flatten the gain of Erbium-doped fibre amplifiers.     

POROSITY CALCULATION OFMIXTURES OF FIBROUS PARTICLES

The initial forming of fiber blend to high green density, i.e. the packing of fibrous particles, is important to the reinforcement of composite materials. It is very useful to develop a general predictive method for the optimum selection of particle mixtures for the property control of ceramic or composite products. This paper presents such a mathematical model developed on the basis of the similarity analysis between the spherical and non-spherical particle packings and assesses its applicability to the packing of fibrous particles with discrete and/or continuous length distributions. The results indicate that the model can predict this packing system well and hence provide an effective way to solve various packing problems in the composite materials processing.