同时存在横向位移和角度偏差时两平板光波导的连接损耗

用对称平板光波导基模场的高斯近似来计算同时存在横向位移，角度偏差以及波导参数不一样情况两单模平板波导的连接损耗，导出了非常简单的公式，同时也给出了数值计算的实例。     

用迭代法求含缓冲层四层平板波导的传播常数与衰减系数

给出计算含缓冲层的四层平板波导传播常数与衰减系统的迭代计算方法，导出了由三层平板波导传播特性计算含缓冲层四层平板波导传播特性的高阶近似解析式。方法简便易行，且可求得较高精度的结果。     

用迭代法求含缓冲层四层平板波导的传播常数与衰减系数

给出计算含缓冲层的四层平板波导传播常数与衰减系统的迭代计算方法，导出了由三层平板波导传播特性计算合缓冲层四层平板波导传播特性的高阶近似解析式。方法简便易行，且可求得较高精度的结果。     

用MATLAB模拟三层平板波导的模式特性

本文建立三层平板光波导模型，推导出电场方程的具体形式，运用MATLAB对三层平板波导理论进行分析求解，使以往复杂的计算变的非常简单。将具体数值代人电场方程进行计算，取不同的波导层厚度时得到不同的波导模式，然后做出不同波导模式TE波的三维图形。最后介绍了三层平板波导理论在激光器模式理论中的应用。     

金属包覆平板波导模式特性的有限元法分析

采用有限元法（FEM）分析了具有复数折射率的金属包覆介质波导的模折射率与模场分布情况。计算了具有损耗层的6层介质平板波导模折射率，并与解析解比较，二者有较好的一致性；分析了金属包覆3层平板波导中TM模折射率与波导芯厚度的变化关系，计算了金属包覆5层平板波导中TM模折秧经与金属层厚度的变化关系，并结合对模场分布的分析对模式进行了定性判断，给出了其模式演变过程。     

阵列波导光栅复用器优化设计的数值计算

阵列波导光栅(AWG)复用／解复用器的优化设计计算是集成光波导器件设计计算中的难点．文章应用AWG光信号传输特性和光栅方程，提出了AWG组成部分输入／输出波导、阵列波导、平板波导相关参数及阵列波导结构优化设计的数值计算方法，给出了具体的计算数值；该计算方法解决了AWG复用器优化设计计算的问题，为进一步建立AWG的计算机辅助设计提供了基础．     

金属包层渐变折射率平板波导传播特性

本文采用多层线型分割近似，结合欧姆损耗微扰法，分析了金属包层渐变折射率平板波导的传播特性。按此方法计算了几类典型波导的传播常数数值，结果均与精确值相吻合，且物理概念清楚，计算方法简单。     

LNL型幂次律非线性平板波导的传播特性

采用有限差分法计算分析了（LNL）型幂次律非线性（ε∞|E|^δ）平板波导的传播特性，得到了不同幂次δ下，LNL型非线性平板波导的场分布曲线族、芯区功率曲线族以及总功率曲线族。结果表明，δ越大，稳定传播所需光功率越小。     

一种分析平板锥角喇叭天线辐射特性的新方法

给出了一种分析平板和平板锥角喇叭天线辐射特性的新方法。这种方法把天线辐射问题转换为波导不连续性结构的传输问题,从而避免了传统天线分析方法中求解场源问题的困难,大大简化了分析过程。同时,采用将模匹配和多模微波网络理论相结合的方法来计算相关波导不连续性的传输问题,使计算结果有较高的精度。通过计算值与理论值的比较,证实了本文方法的有效性和精确性。     

聚合物单模光波导的研究

采用一种间接方法，计算出了DCNP／PEK－c主客掺杂聚合物薄膜在1300nm波长下的折射率；在对其平板光波导研究的基础上，进行了新型单模倒脊型聚合物光波导的设计与制做。结果表明，此种新型光波导具有较好的单模性。     

In-situ investigation of coupling between a fibre and a slab waveguide

The mode coupling between a fibre and a slab waveguide was experimentally investigated during the formation of the slab. A thin film has been deposited on a polished fibre close to the core-clad interface. By monitoring the optical transmittance of the fibre during the film deposition the coupling efficiency between the formed slab and the fibre has been studied as a function of the film thickness. Strong attenuation in the fibre output has been observed for thickness values at which the propagation constants of the optical mode in the fibre match those of the slab waveguide.<>     

Vector circuit method applied for chiral slab waveguides

Eigenvalue equations for the propagation constants of lightwaves in open chiral slab waveguides are derived. The analysis makes use of vector circuit modeling of a chiral slab, the method which has been previously applied for calculating reflection and transmission of electromagnetic waves in chiral multilayer structures. The general eigenvalue equation for the guide which is valid for arbitrary boundary impedance conditions on the slab interfaces is derived, and three special cases are analyzed in detail: an open chiral dielectric slab with dielectric half spaces of the opposite sides of the slab, a chiral slab on an ideally conducting surface, and a chiral slab on an ideal magnetic surface. The theory is visualized by calculated dispersion curves indicating the chirality effect on the wave propagation characteristics     

非对称含左手材料平面波导的传输特性

由Maxwell方程组讨论三层非对称含左手材料平面波导,推导了衬底和覆盖层为左手材料而薄膜为右手材料的平面波导TE模的色散关系;通过求单位宽度TE模所承载的功率,得到了含左手材料平面波导的等效厚度;引入右手材料平面波导的相关方程、曲线并和含左手材料平面波导的方程进行对比分析,发现了非对称3层含左手材料平面波导的一些奇异特性。     

二极管泵浦板条激光介质的二维温度和应力分布

用有限差分法对各种边界条件下二极管侧泵浦板条介质通光截面上的温度和应力二维分布作了数值计算。并对此作了分析,由此提出了适用于不同泵浦水平二极管泵浦板条激光器的冷却方案。     

板条激光器VRM光腔输出激光光束质量实验比较

针对磷酸盐钕玻璃板条激光器,采用含不同VRM的不同谐振腔型对输出激光光束质量进行了实验比较研究,与普通平凹腔的光束质量也作了比较.测量系统经过数据校核,结果是正确的,所得测量结果对VRM在板条激光器中的应用有参考价值.     

The output beam quality of a Q-switched Nd:glass slablaser

The authors have constructed and tested a flashlamp pumped, Q -switched, Nd:glass zigzag slab laser. The thermally induced optical distortion through the slab is minimized by uniform pumping and cooling and the use of corrective pump shields at the slab ends. The laser spatial output for Q-switched resonators has been measured and modeled. It is shown that a large aperture planar oscillator has an output divergence many times above the diffraction limit. Operation as a one-dimensional unstable resonator in the wide direction of the slab allows the efficient extraction of energy in a high-quality beam. Near-diffraction-limited laser output of 5 J at 4 Hz is achieved with a resonator that includes an intracavity telescope to correct for residual defocusing in the thin direction of the slab     

脉冲预电离高频放电板条CO2激光器

本文提出了一种脉冲预电离的高频放电扩散冷却板条CO2 激光器 ,实现了非常均匀的大面积矩形截面放电并获得了激光输出     

YAG板条激光振荡-放大器(MOPA)的实验研究

建立了一级振荡二级放大YAG板条激光装置,并进行了自由振荡和使用新型YAG:Cr4+色心晶体调Q输出的能量放大以及光束质量随放大级泵浦能量变化的实验研究。结果表明,该MOPA系统由于热效应小,可输出高光束质量的激光。     

Dielectric Slab Rotman Lens for Microwave/Millimeter-Wave Applications

A new form of a Rotman lens is proposed for microwave/millimeter-wave applications such as a collision-avoidance radar. The proposed lens can be described as a dielectric slab fed by slot lines. The new form is expected to show lower loss and lower mutual coupling than the conventional Rotman lenses fabricated with conducting plates at millimeter-wave frequency. Taking the field distribution inside the dielectric slab into account, the$ TE_0$mode was chosen to excite the dielectric slab lens. The dielectric Rotman lens consists of a dielectric slab, tapered slot structure, and the transitions between the antipodal slots and microstrip lines for subminiature A connectors. The conventional design equations have been modified for use in designing the dielectric slab Rotman lens with a high dielectric material. A prototype was implemented with nine beam ports and nine array ports. Measurements from 10 to 20 GHz show that mutual coupling can be lowered at higher frequency. The obtained efficiency of the dielectric slab lens system is approximately 30%. The efficiency of the lens is comparable to that of the conducting plate lenses even though there is a spillover loss from the dielectric slab.     

Characterization of rectangular waveguide with a pseudochiral /spl Omega/ slab

A mode matching approach has been employed for evaluating the matrix S of the section of rectangular waveguide with pseudochiral /spl Omega/ slab. Scattering characteristics for different localizations of the /spl Omega/ slab in the guide are predicted numerically and verified by measurements. Based on the numerical analysis, the scattering properties of the guides are discussed. Scattering parameters are next applied in an optimization procedure to extract constitutive parameters of the /spl Omega/ slab used in experiment.