查询词典 transmission grating

And then the partially polarized and coherent Gausian-Schell beam is taken as a numerical example to study the influence of the polarized grating TE and TM complex transmission and some parameters of the incident PGSM on the polarization degree of the diffraction field and the diffractive orders's angular correlation in details.

以部分偏振的高斯-谢尔模型光束为例，数值分析了偏振光栅TE和TM波的复振幅透过率、入射光束的光学参量对衍射场偏振度和场中各衍射级次的角相关的影响。

It was found that the transmission spectrum of the filter is the cosine function modulated reflection spectrum of the fiber grating.

结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。

The diffraction efficiency of a gold transmission phase grating is simulated as a function of the depth of grooves and the duty cycle on the basis of the scalar diffraction theories.

根据衍射光栅的标量理论，计算并讨论了金透射光栅在软X波段衍射效率对光栅厚度和占宽比的依赖关系。

V-I transmission matrix method is presented firstly in this paper to analyze the reflection spectral characteristics of fiber grating F-P cavity and the V-I transmission matrix model is established.

本文首次将V-I传输矩阵法用于光纤光栅F-P腔反射光谱特性的分析，并建立了V-I传输矩阵模型。

Lost and cost are two problems which are difficult to be resolved coinstantaneous in Fiber Bragg grating reflection signal pickup. We analyzed the spectra transmission characteristics of FBG Sagnac loop with coupled mode theory , and discussed the affection of optical path difference to its transmission.

论文利用模式耦合理论，对光纤Bragg光栅Sagnac环的传输特性进行细致的讨论，分析了光程差对其传输特性的影响，并提出了光纤光栅Sagnac环包络带通滤波器的概念，指出其在光纤光栅反射信号提取中的低损耗和低代价的特性，最后通过实验研究验证了理论上的分析和构想。

The EDFA dynamic gain equalizer based on HPDLC grating is developed according to the character of HPDLC grating's transmission spectrum.

根据聚合物分散液晶光栅的透射谱特性和其电压可调控特性的研究，提出了基于聚合物分散液晶光栅的掺铒光纤放大器动态增益均衡器。

The fabrication of transmission gratings with the grating constant of 2.5μm and 5μm is studied in ZK6 and LaF2 glasses at the machining speed of 400μm/s by using femtoscond laser with the peak intensity of 2.7×10~(13)W/cm~2, and the diffraction patterns of the grating are presented with a semiconductors laser at 650 nm.

在加工速度为400μm/s、激光的峰值功率密度为2.7×10~(13)W/cm~2时，在ZK6玻璃和LaF2玻璃内制备出光栅常数为2.5μm和5μm的透射式衍射光栅，并在650nm的半导体激光照射下获得了光栅的衍射图样。

Beginning with wave equation, the paper has deduced the propagation of gauss pulses in single mode fiber and fiber grating transmission compensation. The characteristics of cascaded phase-shift gratings are discussed by numerical simulations of coupled-mode theory and T-matrix method. The experimental works and measurement results are shown in this paper. On the other hand, we have introduced the basic theory of EDFA and figured out the characteristics for EDFA at different conditions by numerical simulation. Some experimental results for EDFA are also presented here. In this article, you can find the influence on Optical Fiber Amplifier by Gain Tilt, especially, the negative effect on CSO in CATV transmission system.

论文首先从波动方程入手，对高斯脉冲在单模光纤中的传播演化及光纤光栅透射补偿进行了详细的研究；较系统地介绍了光纤光栅的耦合模理论，并将传输矩阵计算法用于计算级连相移光纤光栅的光学特性；重点介绍了作者在光纤光栅刻制及特性测量方面所做的一些实验研究工作；较系统介绍了EDFA的基本理论，计算出各种条件下EDFA的光学特性，并进行了一些实验研究；综合分析光纤放大器对光纤传输系统的影响，特别分析了光纤放大器增益不平坦对光纤CATV系统中CSO恶化的原因及其解决方法，并研究了光纤布拉格光栅在稳定980nm泵浦源输出功率和输出波长方面的应用；结合一个基于光纤光栅和光纤放大器的光纤用户接入网方案，对光纤用户接入网的若干问题进行了理论与初步的实验研究。

In the paper, a brand new measuring proposal which developed the foundation of conversional grating measurement has been introduced. It applies the electronic ocular (which essential element is CMOS image sensor) to the length measurement and uses the digital image processing technique subdivide the grating image in order to improve the distinguishability and accuracy of the system, and make the data processing, saving and transmission much more easier in the meantime.

本课题在现有的光栅计量基础上提出了一种全新的测量技术方案：结合现有的光栅计量技术，以电子目镜(核心元件为CMOS图像传感器)作为光电转换器件应用于长度测量系统，并采用计算机图像处理技术对测量的光栅图像进行数字化细分，以达到较高的系统分辨率及测量精度，并且使测量数据的处理、保存和传输更加简便。

Analytical formulae are presented for the first time to describe the shift in the resonance wavelength of LPG in response to etching of the fiber cladding or a change in the external refractive index. The accuracy of the formula is confirmed by comparision with numerical simulations and experimental results. We demonstrated that the resonance wavelengths of an etched LPG are more sensitive refractive index than those of an unetched grating. The bending properties of long period fiber grating written in different type fiber are studied experimentally. The transmission peaks and the central wavelength of LPG change with the bending of the fiber. A new peak appears at the shorter wavelength when the fiber is being bent. The changes of the peaks are different for different photosensitive fiber. Those properties have broad application foreground in fiber sensors and tunable filters.

分别从理论和实验上对长周期光栅的折射率特性以及光纤包层半径对长周期光栅特性的影响进行了研究，首次给出了描述光纤包层半径腐蚀和外界折射率改变与长周期光栅共振波长关系的理论表达式，实验与理论和数据模拟的结果很好符合，利用腐蚀光纤包层的方法可以有效地提高LPG的折射率灵敏度；对不同光纤中写入的长周期光栅的弯曲特性进行了实验研究，LPG的透射峰形状及其中心波长随光纤弯曲而发生变化，并且随着弯曲将在短波方向出现新的透射峰，其透射峰的变化规律因所用光敏光纤的不同而不同，这一特性在光纤传感和可调谐滤波器方面有重要的应用前景。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。