Modified coupled-wave equations are used to calculate the effect of grating shape on coupling coefficient of the second-order gratings.
利用改进的耦合波理论计算了具体器件结构中光栅形貌对二级光栅耦合系数的影响。
This is particularly grating now, because he is cutting public spending and asking the French to retire later in life in order to reduce the budget deficit.
现在的批评更为激烈，因为萨科奇正在削减公共开支并要求法国人推迟退休以降低预算赤字。
The on - off of the first diffraction order of the grating is 87:1. The sample shows good switch ability.
制得的光栅其第一衍射级次的开关比为87：1，显示了较好的开关能力。
Since the characteristics of higher order cladding mode resonances are specific in LPG, it will exhibit different phenomena during the process of grating manufacturing.
由于长周期光栅在较高次包层模谐振时的特殊性，在光栅制作的过程中会出现与其它包层模谐振不同的特性。
What remain to be improved are the effect of the general noise in grating-making on the output quality and the imbalance of diffraction order intensity.
光栅制作时引入的综合噪音对输出质量的影响及各衍射级能量的不均衡问题尚待进一步改进。
The second order diffraction light of Rayleigh scattering light, Raman light, diffused light and the fluorescence diffracted from the grating have been discussed.
本文讨论了瑞利散射光、拉曼散射光、漫散射光及荧光经光栅衍射而形成的高级次光谱的干扰。
A new theoretical analysis of the contrast reversal images for the zeroth and other diffraction order encoded by a rectangular grating is given.
本文对矩形光栅编码图片的衍射零级与其它各级单独所成的象，其衬度能够反转的现象，提出了新的理论分析。
A novel technique for fiber Bragg grating sensing demodulation is introduced in order to judge axis strain of sensing fiber Bragg grating.
为判断作用在传感光栅上的轴向应变，提出了一种光纤光栅应变传感解调新方法。
With a phase grating located at Fourier frequency plane, optical image subtraction is obtained as a result of the coherent superposition of the zeroth and the first order of the diffracted light.
置一位相光栅于相干光学处理系统频谱平面，利用其零级与一级衍射光的相干迭加实现图象相减。
The relationships between the number of diffraction order and grating pitch, refractive index of medium, light wavelength, incidence Angle and azimuth Angle are investigated.
讨论了入射角、入射方位角、入射光波长、光栅栅距、介质折射率与矩形光栅衍射级次数目间的关系。
The modal cutoff properties and exciting conditions of higher order resonant modes for Ge-doped photonic crystal fiber Bragg grating(PCFBG) are investigated using beam propagation method(BPM).
采用光束传播法研究了实心掺锗光子晶体光纤布拉格光栅（PCFBG）的模式截止特性。
In order to solve this problem, a new method is provided based on the Hybrid Genetic Algorithms, and using a emulation program design a common binary optics elements-Dammann Grating.
为了解抉这个问题，介绍了一种将遗传算法与模拟退火算法相结合的混合遗传算法，并具体地利用这一优化算法设计了一种常用的二元光学元件——达曼光栅。
In order to achieve high resolution in grating angles measuring system, phase fine division is adopted generally.
为了使光栅测角系统获得较高的分辨率，通常采用鉴相式电子细分。
In order to explore the temperature sensitivity of fiber Bragg grating (FBG) in smart metal structure, the stress and strain of FBG under temperature variation must be analyzed.
为了探索光纤智能金属结构中光纤布喇格光栅(FBG)的温度灵敏度，必须对温度变化时光纤智能结构中fBG所受的应力应变进行分析。
In order to improve the convergence rate, a correct Fourier expand method was introduced to differential theory of the finite conductivity diffraction grating.
在有限电导率光栅的微分理论中引入校正傅里叶展开方法，改善了计算收敛性。
The optical system uses the fluorescent lamp with the collimation mirror, incident the grating surface by the parallel light, in order to produce the moiréfringe through the grating.
光学系统采用白光灯加准直镜，以平行光照射光栅面，通过光栅副产生莫尔条纹。
In order to overcome these disadvantages, a new design is stated that fiber Bragg grating sensor (FBG) is adopted to monitor the stress and strain of anchor in this paper.
针对这一现状，提出了将光纤光栅传感技术应用于锚索应力、应变监测的新方案。
In order to improve the speed and precision of image Mosaic for IC vision inspection, a fast and accurate image Mosaic technique based on precision grating measurement system was presented.
为了提高IC芯片视觉检测中图像拼接的速度和精度，提出一种基于精密光栅运动系统的快速精确图像拼接技术。
Incremental optical electric axial Angle encoder usually adopts zero position grating providing absolute zero position in order to prevent from data fault during electricity failure suddenly.
为了防止突然断电时造成数据错误，增量式光电轴角编码器通常采用零位光栅提供绝对零位信号。
In this method, the measuring sensitivity can be varied by selecting different grating constam or diffraction order. This method can be applied to polished surfaces and rough surfaces as well.
这种方法可通过选择不同的光栅常数或衍射级来改变测量的灵敏度，可测量抛光的表面，也可测量粗糙的表面。
In order to fully use the resolution of optical scanning hologram system, a method of using circular grating to scan the objects is proposed for producing the optical scanning holograms.
为了充分利用光学扫描全息系统的分辨率，提出了用环形光栅扫描物体的光学扫描全息术。
In order to decrease polarization mode dispersion (PMD) of chirped fiber Bragg grating, a novel method, which is called polarization mode dispersion-compensation written technique, has been developed.
为减少写入光纤光栅的偏振模色散，研制了新的低偏振模色散光纤光栅补偿写入法。
In software part, the grating signal is subdivided by the ADC of single-chip microcomputer in order to achieve the system qualification expected.
在软件设计中，利用单片机内部集成的ADC完成信号的数字细分，从而达到很高的细分精度。
Diffraction efficiency of volume Bragg grating, whose period is in the same order as the incident wavelength, is related to the polarization direction of the incident linear polarized beam.
周期与入射波长同数量级的体积布喇格光栅的衍射效率，与入射线偏振光的偏振方向有关。
Weak modulated dielectric grating can be equivalent to planar waveguide. When it diffracted high-order spatial sub-wave is coupled with waveguide mode, a guided mode resonance is formed.
弱调制介质光栅可等效为平板波导，经其衍射的高级次子波与波导模式耦合时，形成导模共振。
In order to improve the processing speed and precision of the instrument, I have designed a fiber grating system, which is based on double ATMEL 89c52 8-bit SingleChip Microcontroller.
为了提高解调器的速度和精度，设计了基于双atmel 89c52的8位单片机的光纤光栅解调系统。
And line grating is used to measure arc length in order to increase Angle measuring precision, thus high differentiate locating in space can be realized.
用长光栅测弧长来实现角度测量的高分辨率要求，实现空间上的高精度定位。
This method is applied to calculate the diffraction efficiencies accurately for arbitrary grating profiles, incident angles, substrate indexes and wavelengths in the same order of grating period.
这种方法适用于光栅周期处于波长量级、任意光栅轮廓及倾斜入射时的精确衍射效率计算。
In order to achieve flat multi-wavelength output, a long-period fiber grating with loss peak at 1530 nm is used to obtain flat gain spectrum.
为了获得平坦的多波长输出，在谐振腔里使用了一个损耗峰位于1530nm处的长周期光纤光栅，以获得较为平坦的增益谱。
In order to achieve flat multi-wavelength output, a long-period fiber grating with loss peak at 1530 nm is used to obtain flat gain spectrum.
为了获得平坦的多波长输出，在谐振腔里使用了一个损耗峰位于1530nm处的长周期光纤光栅，以获得较为平坦的增益谱。
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