全氟羧酸离子交换膜内化铅超微粒的光学非线性研究

在全氟羧酸阳离子交换膜中制备出不同颗粒尺寸的ＰｂＳ超微粒，并由吸收光谱及电镜测量结果获得证实。用习秒激光脉冲对ＰｂＳ超微粒复合膜进行了分辨光克尔效应测定，发现ＰｂＳ超微粒具有三阶光学非线性，三阶光学非线性极化率Ｘ＾（３）约为１０＾－１２ｅｓｕ，光克尔效应时间小于１６５ｆｓ，并且发现ＰｂＳ超微粒的光学非线性随着超微粒颗粒尺寸的减小而增大，显示出量子限域效应对于超微粒子光学非线性的贡献。     

全氟羧酸离子交换膜内金属硫化物超微粒的制备及其性能

首次以全氟羧酸离子交换膜为生成介质制备出纳米尺寸Ｚｎｓ。ＣｄＳ及Ｐｂｓ超微粒。ＺｎＳ为非晶态，而ＣｄＳ，ＰｂＳ超微粒分别为六方和立方晶型；通过改变膜的含水量得到不同尺寸的ＰｂＳ超微粒，并且随颗粒尺寸减小，其三阶光学非线性极化率ｘ＾（３）增大。     

BaTiO3基Au纳米颗粒复合薄膜的制备及其光学性质研究

采用溶胶-凝胶（sol-gel）方法，成功的将高体积面分比的Au纳米颗粒复合到BaTiO3的非晶薄膜中，并对其光学性质进行了研究。用XRD、TEM、椭偏仪、吸收光谱、光克尔效应OKE（Optical Kerr Effcet）方法对薄膜进行了表征和测试。从吸收光谱观察到表面等离子体共振SPR（Surface Plasma Resonance)峰随热处理温度升高而红移的现象。光学非线性测试表明薄膜具有高的三阶非线性极化率Χ^(3)和超快的响应时间。     

三阶非线性光学玻璃研究进展

简要叙述了三阶非线性光学理论，重点介绍了近年来国内外三阶非线性光学玻璃领域的研究进展，展望了玻璃作为光信号处理用元件（如全光开关）的应用潜能。     

BaTiO3基Au纳米颗粒复合薄膜的制备及其光学性质研究

采用溶胶-凝胶(sol-gel)方法,成功的将高体积百分比的Au纳米颗粒复合到BaTiO₃的非晶薄膜中,并对其光学性质进行了研究.用XRD、TEM、椭偏仪、吸收光谱、光克尔效应0KE(Optical Kerr Effect)方法对薄膜进行了表征和测试.从吸收光谱观察到表面等离子体共振SPR(Surface Plasma Resonance)峰随热处理温度升高而红移的现象.光学非线性测试表明薄膜具有高的三阶非线性极化率x⁽³⁾和超快的响应时间.     

纳米颗粒-介电复合材料三阶光学非线性的研究进展

纳米颗粒-介电复合材料显示出优良的三阶非线性光学性能,是应用于未来全光器件的理想材料.其中,纳米颗粒的尺寸、浓度、组成和结构,基体的选择,测试方法中选用的激光波长和脉冲宽度等多种因素都对此类复合材料的三阶非线性光学性能有很大的影响,了解这些影响因素对材料的制备和应用具有重要的指导意义.在此基础上,研究指出核壳结构纳米颗粒-介电复合材料具有更加优异的三阶非线性光学性能,是目前的研究热点.     

TiO2／SnO2超微粒及其复合LB膜的紫外—可见光吸收光谱的研究

用胶体化学方法制备ＴｉＯ２／ＳｎＯ２超微粒,ＴｉＯ２／ＳｎＯ２超微粒及其复合ＬＢ膜的紫外－可见光吸收光谱研究表明：ＴｉＯ２／ＳｎＯ２超微粒具有量子尺寸效应使吸收光谱发生“蓝移”;ＴｉＯ２／ＳｎＯ２超微粒／硬脂酸复合ＬＢ膜具有良好的抗紫外性能和光学透过性能。     

尿烷取代聚二炔反饱和吸收光限幅特性的研究

聚合炔（ＰＤＡｓ）材料有较大的非线性光学效应，在全光设备中有较大的在应用本文分别研究了尿烷取聚二乙炔的增强吸收和粗糙界面的光限幅特性，并分析了共限幅机理，发现粗糙界面光限幅比增强吸收光限幅有更好的光限幅特征。     

硫硒化镉微晶玻璃制备和非线性光学性质研究

具有明显量子尺寸效应和较大三阶非线性光学效应的CdSxSe1-x(O相似文献   

醌构稠杂环化合物三阶非线性光学性质的研究

用三维简并四波混频实验研究了所合成的４种萘醌并噻唑，四氧二苯并噻蒽化合物的三阶非线性光学性质。上对测量法测得样品溶液的χ＾（３）≌４×１０＾３ｅｓｕ，分子的三阶超级极化率γ≌４×１０＾－３１ｅｓｕ。分析了分子结构对三阶非线性光学性质的影响。     

Determination of optical constants and inhomogeneity of optical films by two-step film envelope method

A simple two-step film envelope method has been proposed to determine the optical constants and small inhomogeneity of the optical films, which uses maximum envelopes and minimum envelope of the normal incidence transmittance of the two-step film. The two-step films were prepared by stopping the deposition process in the middle of the designed sputtering time, and then, after a full cooling down to room temperature, repeating the same deposition process again to complete the whole preparation of the films. The optical constants of Nb₂O₅-TiO₂ mixed films were calculated by two-step film envelope method and traditional envelope method. The experimental results demonstrate that the average refractive index and extinction coefficient calculated by two-step film envelope method are more accurate than those calculated by the traditional envelope method.     

前置光放大器实验研究

报道了在１４０Ｍｂ／Ｓ光通信端机上采用国产１．３μｍ低噪声半导体光放大器作为前置光放大器的研究结果。理论分析和实验表明，必须采用窄带光学滤波器滤除光放大器自发辐射引起的各种噪声。当光学滤波器为最佳带宽４ｎｍ，光放大器为最佳电流６５ｍＡ时（此时增益为１４ｄＢ），系统接收灵敏度改善５ｄＢ。前置光放大器噪声指数大约为３ｄＢ。     

可擦写相变与4×只读双功能光存储

对国际新推出的可擦写相变与4×只读双功能光存储系统PD进行了技术性论述分析，内容包括：直接重写相变光盘介质、PD的新型光学头技术以及双功能驱动的机理。     

140Mbit／s半导体激光放大传输实验

报导了利用行波半导体激光放大器进行的１４０Ｍｂｉｔ／ｓ传输实验，对光放大器增益－电流、增益－输入功率以及输出－输入功率特性进行了测试，并分析了光滤波器对传输性能的影响。     

Preparation and characterization of sol-gel silica based neutral optical density coatings by the addition of graphite particles

Silica based coatings with various thicknesses (600-3000 nm) were prepared from the gellation of aqueous suspensions composed of colloidal silica particles, small graphite particles and inorganic binder materials, the latter were included to improve the coating structure. The graphite particles added in amounts of 0.8-3.6 wt.%, in the dried coating, absorb visible light with the same efficiency, which results in coatings with neutral optical density in this range of the spectrum. The optical density of the coatings can be changed from basically 0, in coatings without graphite, to more than 2 in thick coatings with 3.6 wt.% of graphite. The structural characterization of the coatings was carried out using X-ray diffraction, Raman scattering and atomic force microscopy.     

光互联网中新型双向可调OXC的设计

本文提出一种新型双向可调2×2的OXC结构,采用可调光纤布喇格光栅和环行器构成。由2×2基本结构能方便地扩充到N×N的B-OXC。此结构具有插入损耗较小、结构简单、体积小、价格便宜等优点,在未来的全光网络中具有广泛的应用前景。     

自由空间的微闪耀光栅光开关

微光学元件在现代光学中具有重要的作用,通过制作8台阶的微闪耀光栅列阵,控制周期参数,利用其在空间的闪耀输出与级连,可以实现2×2、4×4以及8×8的光开关功能,光信号交换透明,无光电-电光转换过程。对微闪耀光栅输出信号的串扰分析表明,微闪耀光栅光开关可以有效的抑制串扰问题,在全光网络通信中具有一定的应用。     

Facile synthesis and optical band gap calculation of Mn3O4 nanoparticles

Mn₃O₄ nanoparticles were prepared by a simple solid state decomposition method. Four manganese benzoic acid complexes were synthesized through semi-solid phase reaction method as precursors for the preparation of Mn₃O₄ nanoparticles. The calcination temperature of the precursors was determined from thermal gravimetrical analyses (TGA). The resulting nanoparticles were characterized by XRD, SEM, STM and HRTEM. The obtained particle size is in the range 39–90 nm. HRTEM indicated the formation of spherical nanoparticles. The optical absorption measurements for the obtained nanoparticles showed that the fundamental absorption edge obeys Tauc's relation for the allowed direct transition. It was found that, the optical band gap (E_g) increases with the decrease of the particle size of the Mn₃O₄ nanoparticles.     

JC—1型精密测角仪光学系统设计

本文重点介绍JC-1型精密测角仪的动态光电自准直定位平行光管光学系统,为了满足测角仪对多谱线高精度测量的要求,应采用的结构形式及象差校正方案。     

具有双极性的非相干OCDMA系统性能分析

提出了一种可减少多址干扰的非相干OCDMA编解码方案，该方案利用光开关控制2个单极性编码器和1个具有平衡互补结构的解码器，在1个光学信道上实现了双极性OCDMA信号传输；分析了电光编码、传输、解码、光电转换等环节的信号变化，推导出系统的噪声和误码率公式；与其它CDMA方案比较表明本方案在误码率方面可达到电域双极性CDMA系统的水平。