查询词典 wavelength

The study indicates that the center wavelength of FBG's reflected spectrum on the two polarization directions shift, and the reflectivity decreased with the increase of the twist angle. The longer wavelength produces"red shift". The shorter wavelength produces"blue shift". And the wavelength shift is basically same.

研究表明，随着扭转角度的增加，两个偏振方向的光栅反射谱中心波长发生移动且反射率降低，长波长的产生"红移"，短波长的产生"蓝移"，移动的波长量基本相同。

We indicate that when wavelength number is larger than 16, even 8, all of the networks show good small blocking performance. Further, we discuss different aspects that affecting blocking, including routing, wavelength number, wavelength assignment, wavelength conversion, multi-fiber and network connectivity. We find out that increasing wavelength or implementing multi-fiber can reduce blocking dramatically while in light loads (＜0.4Er), fixed alternate routing or First Fit wavelength assignment can improve the performance to some extent.

为了进一步获得更优的阻塞特性，研究比较了影响阻塞率的几个重要方面，包括路由（固定路由与固定可选路由）、波长数与波长分配算法、波长变换与多光纤、网络连接度，结果表明阻塞特性通过增加波长或采用多光纤可以得到明显的改善，在负载较轻时(＜0.4Er)，改用可选路由方式或First Fit波长分配算法也可以一定程度地改善阻塞率，但是这种改善受网络连接度和波长数的影响比较明显。

Waveband switching was used to reduce the complexity and the size of multi-granular optical cross-connect in wavelength-division-multiplexing optical networks.

0引言波分复用(wavelength-division-multiplexing，WDM)技术在大幅度提高传输容量的同时，也增加了交换设备的规模、控制难度和管理复杂性[1]。

With the explosive increase in network traffic and the emergence of high performance optical network devices, such as optical cross-connect and optical add/drop multiplexer, wavelength-division multiplexing technology have emerged as a promising candidate for next-generation networks.

网络业务量的爆炸性增长以及高性能的光网络设备（如光交叉连接器OXC、光分插复用器OADM）的出现，推动波分复用技术（Wavelength-Division Multiplexing，WDM）成为下一代骨干网络的核心技术。

In this thesis, terahertz transmission properties through three kinds of simple sub-wavelength metallic structures, including single sub-wavelength metallic circular hole, single sub-wavelength metallic slit and double sub-wavelength metallic slits, are experimentally investigated in the far field by using our own THz time-domain spectroscopy system and are theoretically analyzed. Conclusions are obtained as follows:(1) a single sub-wavelength metallic circular hole exhibits the same terahertz transmission properties as that of round metallic waveguide, which are influenced by the diameter of circular hole and the thickness of metal foil.

本文利用本实验室搭建的太赫兹时域光谱系统研究了太赫兹波段金属亚波长结构的透射特性，其中对三类金属亚波长简单结构即单个金属亚波长圆孔、单个金属亚波长狭缝和金属亚波长双缝的太赫兹透射现象进行了远场探测以及理论上的分析，得到了以下一些成果：(1)太赫兹波通过单个金属亚波长圆孔的传播现象与圆形金属波导具有相同的规律，其特性受到圆孔直径和金属箔厚度的影响。

The analysis of the optical signal transmission characteristics and the physical parameters provides the theoretical foundation for optimizing the design and improving the performance of AWG; and the optimizing design numerical value calculation method solves the complex problem of the optimizing design of the AWG, it can also provide a way for AWG computer aided design system; the AWG optical signal processing analysis provide a way for optical signal Fourier transform, serial and parallel transmission, circle shift, matrix transform and differential processing; the optical signal processing characteristics of AWG develop AWG to use for new field, and the optical signal processing will play an important role on all-optical networks in the future; by the definition of the wavelength transform matrix of the AWG, the signal output positions that come from these input signals of the different wavelength or the same wavelength but the different input ports and carrying different signals can be accurately determined, and the wavelength transmission matrix plays an important role for analyzing the routing of the complex optical network, or designing the network nodes such as the optical path add/drop multiplexer and optical cross connect device; the wavelength transmission matrix also provides a method for monitoring and managing the wavelength transmission of the optical network nodes; e analysis of the AWG' OXC node structure and wavelength routing provides a way for realizing the OXC, especially for multi-path/multi-wavelength OXC and the intelligence node of the optical networks; by the studying of the control plain characteristics, router, traffic engineering, program and the improved arithmetic of the wavelength routing, the method for realizing the GMPLS' OXC optical transport network is provided, and it play an important role for the study of the automatic switched optical network; the time-frequency analysis can provide more information about the dispersion and energy changes of .the pulsed light transmission in the singlemode fiber, it also provides more useful parameters for analyzing the dispersive accumulating and dispersive compensating.

AWG光信号传输特性与相关参数的分析，为进一步优化设计AWG及提高其性能提供了理论依据，而优化设计计算数值方法解决了AWG优化设计计算的复杂问题，为进一步建立AWG的计算机设计系统提供了基础；AWG光信号处理的特性分析，提出了AWG应用的新领域，为光信号的傅立叶变换、串并传输、循环移位、矩阵变换、微分处理等提供了一条途径；波长传输矩阵变换关系的建立，不仅得到了确定多路AWG每路信号从输入端口到输出端口的准确输出位置的方法，而且在分析应用AWG实现复杂的光通信网络路由的连接、特别在设计分插复用器和交叉连接器等网络节点时有重要的作用，能有效而准确地确定波长的路由关系，为实现节点波长传输路由的监控和管理提供有效手段；基于AWG的OXC结构和波长路由的确定为实现OXC技术、特别是多路多波长的OXC和光网络的智能节点技术提供了有效的方法；控制平面的特征、路由器、流量工程、程序及改进的波长路由算法的研究实现了基于GMPLS的OXC光传送网络的控制平面，为建立自动交换光网路提供了一定的基础；时频分析可以更直观和更清晰地描述脉冲信号在单模光纤中传输色散和能量的变化，为色散积累和色散补偿提供有效的分析参数。

For the wavelength assignment in all-optical network, our research include:(1) For the wavelength assignment on ring optical networks with fixed wavelength converters, we use permutation group to study the ability of wavelength converters, and design an assignment algorithm, which can give a good assignment scheme in any general case.

其中，在全光网的波长分配方面，主要包括：（1）对于环形光网中固定波长转换器的情况，采用置换群来刻画转换器的能力，在此基础上提出了一个对于一般情况能够给出较好波长分配方案的算法。

The results show that ponceau 4R excited by light at the wavelength of 330-430 nm can generate a strong fluorescence at the 621 nm peak wavelength with its best excitation wavelength being 376 nm, amaranth excited by light at the wavelength of 300-440 nm can generate a strong fluorescence at the 643 nm peak wavelength with its best excitation wavelength being 370 nm, tartrazine excited by light at the wavelength of 280-380 nm can generate a strong fluorescence at the 565 nm peak wavelength with its best excitation wavelength being 315 nm, sunset yellow excited by light with wavelength of 310-410 nm can generate a strong fluorescence at the 592 nm peak wavelength with its best excitation wavelength being 348 nm, and brilliant blue excited by light at the wavelength of 320-390 nm can generate a strong fluorescence at the 456 nm peak wavelength with its best excitation wavelength being 350 nm.

结果表明，胭脂红在波长330～430 nm的光激发下，产生较强荧光，荧光峰值波长为621 nm，最佳激发波长为376 nm；苋菜红在波长300～440 nm的光激发下，产生较强荧光，荧光峰值波长为643 nm，最佳激发波长为370 nm；柠檬黄在波长280～380 nm的光激发下，产生很强荧光，荧光峰值波长为565 nm，最佳激发波长为315 nm；日落黄在波长310～410 nm的光激发下，产生较强荧光，荧光峰值波长为592 nm，最佳激发波长为348 nm；亮蓝在波长320～390 nm的光激发下，产生较强荧光，荧光峰值波长为456 nm，最佳激发波长为350 nm。

An allocation optical fiber sensor comprises signal treatment circuit, sensor optical cable, supernarrow wide laser, two detectors, three offsets, four couplers, four wave-length division multiplex, superradiation LED, polarizer and phase adapter, Sagna conoscope and Mach conoscope shares No1 sensitive optical fiber LB with the third wavelength division multiplex through the first wavelength division multiplex, the second wavelength division multiplex shared with the fourth wavelength division multiplex the second sensitive optical fiber to form the hybrid conoscope.

本发明公开了一种分布式光纤振动传感器，由信号处理电路、传感光缆、超窄线宽激光器、两个探测器、三个消偏器、四个耦合器、四个波分复用器、超辐射发光二极管、起偏器和相位调制器组成；在本发明中构成的萨格奈克干涉仪和马赫-泽德干涉仪，通过第一波分复用器与第三波分复用器共用第一敏感光纤L B ，第二波分复用器与第四波分复用器共用第二敏感光纤L C 形成了混合干涉仪。

The results show that it is a suitable method for measuring tuning wavelength of frequency-doubled Nd:YAG laser by means of iodine vapor absorption lines.

标 签 光谱学调谐波长参考吸收谱线碘蒸气 spectroscopy tuning wavelength reference absorption lines iodine vapor

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。