查询词典 waveguide

For the transition of waveguide to microstrip in LTCC modules with irregular shape, hard hermetical package and bad reliability, a new type of waveguide to microstrip transition in LTCC modules is described in this paper.

针对LTCC 组件中波导到微带过渡基板形状加工不规则、密闭封装困难和可靠性差等问题，本文提出了一种用于毫米波LTCC 组件中波导到微带的新型过渡结构。

The research of optical waveguide theory is primitively focused on the area of the linear waveguides. With the rapid development of integrated degree and the prevalent using of the high optical power density, the nonlinear phenomenon appearing in the nonlinear waveguide attracts more and more attention.

最初光波导理论研究的波导多为线性光波导，而随着集成化程度的不断提高，强光源的普遍使用，光波导中出现的非线性效应已倍受关注，对光波导中的非线性效应的研究成为必需。

The method of approaching regular polygon cross section waveguide is proprosed with circle symmetry cross section waveguide.

Marcatili方法、逐点匹配方法、变分法、离散时域差分法，计算量均很大；微扰法通用性强，但规范

Structural parameters such as the width of the low ridge waveguide and the high ridge waveguide are determined and optimized by analyzing the transversal mode field of the device.

论文通过求解横向模场，设计和优化了低脊宽度、调制器高脊宽度等结构参数，并分析了制作调制器高脊的工艺容差。

Design and development of planar waveguide devices to broadcast waveguide Theory as the guide.

设计和研制平面光波导器件播要波导理论的指导。

The optical waveguide loss of thin films was measured by use of the prism-waveguide coupling techniques...

用棱镜耦合的方法测量了薄膜的波导损耗，并给出了波导损耗与工艺过程的关系。

In this dissertation, InGaAs/InGaAsP/InP MQW microdisk laser and its characterization were presented. Some conclusions are as following: the characteristics of lasing threshold was discussed by using rate equation. The dependent relations between threshold and cavity volume, spontaneous emission coupling efficiency β were investigated. The whispering gallery mode and spontaneous emission in a microdisk geometry were then studied. Almost all spontaneous emission was coupled into the lowest order TE mode when the normalized thickness of photonics well was between 0.15 and 0.5. The design principle and device process of InGaAs/InGaAsP/InP MQW microdisk laser were presented. The microdisk lasers with the diameter of 8μm, 4. 5μm and 2μm were succesfully fabricated by using etching techniques. The pulse lasing thresholds for the microdisk with the diameter of 8μm and 4. 5μm were 170μW and 15μW, a record results compared with the published in the literature. The cw lasing threshold for a 2-μm-diameter microdisk was only a few μW. We haven't found similar report up to now. To solve the problem of directional output in a microdisk laser, the power coupling efficiency in a double disk geometry was investigated with the theory of waveguide mode couple. A new structure of electrically pumped microdisk laser with output waveguide was designed, making a foundation for the practical use of microdisk laser.

本文主要研究InGaAs/InGaAsP/InP多量子阱半导体碟型激光器的研制和特性表征，并取得如下结果：利用速率方程理论讨论了激光器激射阈值的特性，分析了阈值与腔体积和自发发射耦合系数β之间的关系；讨论了微碟光子阱结构中的自发发射特性和微碟中WGM模式特性；光子阱结构在其归一化厚度在0.15-0.5之间时，几乎全部自发发射进入到最低阶TE模式中；研究了InGaAs/InGaAsP/InP多量子阱微碟激光器的结构设计原理和器件的制备工艺；利用刻蚀方法成功制备出直径分别为8μm、4.5μm、2μm的碟型微腔激光器；直径8μm和4.5μm的微碟脉冲光泵浦激射阈值分别为170μW、15μW，是目前所见文献报导中比较低的；直径2μm的微碟连续光泵浦激射阈值仅几μW，目前尚未见到达到类似结果的研究报导；为解决微碟激光器激射光定向引出的问题，通过波导耦合模理论分析了双层碟之间功率耦合效率；据此设计了新型带耦合输出波导的电泵浦微腔激光器，为进一步研制可实用的电泵浦微腔激光器打下基础。

Based on the interference theory of light wave and Mie′s scattering, atheory of the quasi-waveguide has been developed for the first time,which,in two aspects,represents the property of the mode spectrum in aquasi-waveguide e.g.the analytic expression of the reflection intensity asa function of the incident angle,and that of the scattered intensity as afunction of the output angle.

基于平面波的光波簇干涉理论和米氏散射，发展了准波导理论，首次给出了从两个不同侧面表征准波导模谱特性的反射光强度与入射角以及散射光强度与输出角的函数关系解析式，并确认其m-线的产生源于米氏散射光及其干涉效应所致的选模作用。

Using waveguide as input port, inside the waveguide we use double antipodal fin-line transition, by adding try and E-T junction, we can adjust the amount of the branches to get more power output.

采用波导端口输入，在波导内部使用双对极鳍线过度，通过附加托盘和E-T形结，可以灵活的调整合成路数来加大功率输出。

Two ends of s shape bent waveguide respectively coaxially link perpendicular waveguide input and output section.

直波导输入输出段、S形弯曲坡面结构、长方体结构和平面光传输波导位于基版的表面，S形弯曲波导位于S形弯曲坡面结构的表面，直波导输入输出段位于长方体结构的表面，基版上的直波导输入输出段和位于长方体结构上的直波导输入输出段通过S形弯曲波导连接，S形弯曲波导的两端分别与直波导输入输出段同轴相切相接。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。