光栅

At first the frequency spectrum of diffraction light is sampled so as to make holographic grating diffraction discrete in space frequency, namely, in the grating code is included discrete frequency spectrum, which satisfies requirements of human vision.

首先对衍射光的频谱进行采样，使全息光栅衍射的是空间频率不连续的离散光，即在光栅的编码中只包含离散光频谱，且满足人眼视觉要求。

The spectrum of fiber Bragg grating can be controlled by double exposure technique. The first exposure is used to control the resonant wavelength of fiber grating by directly irradiating the naked photosensitive fiber.

该方法只使用普通Bragg位相模板，采用两次曝光技术，通过控制光纤光栅的本地谐振波长和反射率，达到控制光纤光栅谱形的目的。

A simple model for the simulation of EDG is introduced and the basic demultiplexing characteristics of EDG is obtained.

文章最后，建立了一个光栅干涉的简单模型，对设计好的器件参量进行模场形状、谱响应、色散等光栅性能的模拟，得到基本的器件解复用特性，并加以分析。

At last the structure tolerance of the expand core fiber is studied. And then the optical coupling efficiency imposed by the position of Gaussian beam on the grating is discussed by comparing the Gaussian beam output from expand core fiber, single mode fiber and free space Gaussian beam with waist radius of 16 microns.

最后分析了扩束光纤的结构容差，并讨论了所设计扩束光纤的输出光束、单模光纤的输出光束以及束腰半径为16 μm的自由空间高斯光束各自在光栅表面的位置变化对光栅耦合效率的影响。

The Fraunhofer diffraction phenomenon on the complementary structure of Sierpinski carpet grating is discussed on the basis of FresnelKirchhoff theory and Fourier analytical method.

利用菲涅耳基尔霍夫光栅衍射原理和傅里叶分析方法，对具有分形结构互补Sierpinski地毯光栅的夫琅和费衍射现象进行了探讨。

The Fraunhofer diffraction phenomenon on the complementary structure of Sierpinski carpet grating is discussed on the basis of Fresnel-Kirchhoff theory and Fourier analytical method.

利用菲涅耳-基尔霍夫光栅衍射原理和傅里叶分析方法，对具有分形结构互补Sierpinski地毯光栅的夫琅和费衍射现象进行了探讨。

An equation for calculating the Fresnel diffraction field of a grating under short-pulsed light illumination is derived.

首先导出了光栅在短脉冲激光照射下的菲涅耳衍射光场的方程，利用该方程分析了一个开口比为1：4的光栅的衍射光场。

The results have been compared with that by using coupled mode theory , Rouard s method and fundamental matrix method, and the accuracy.

用这一方法计算了均匀光纤光栅布拉格相位匹配、失配情况和非均匀光纤光栅的反射系数，并将其结果与用耦合波理论、Rouard方法以及基础矩阵方法的结果进行了比较，并检验了这些方法的精度。

A new type of geophone is presented,based on the narrow band transmission and free of back reflection features of long period fiber grating.

基于长周期光纤光栅能透射特定波长的性质，以及其无后向反射的优点，提出一种新型的长周期光纤光栅地震检波器系统。

The unfolded spectra measured by soft X-ray spectrometer and transmission grating spectrometer are compared.

将软X光谱仪和透射光栅谱仪进行比对，由于软X光谱仪是绝对量测量，而透射光栅谱仪是相对测量，只能比较谱形。

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。