查询词典 grating

The calculation takes into account the effects of grating period, noncollinear amplification geometry, crystal's length and pump intensity. The results show the grating period of PPLN and the noncollinear geometry has effects on the spectral bandwidth.

计算结果表明，参量带宽和增益带宽具有相似的特性，而且PPLN晶体的周期和非共线入射结构会对光参量放大的光谱带宽产生一定的影响，在同一波长处，通过调节晶体周期或非共线结构可以获得更大的带宽。

Subwavelength gratings with different grating parameter have different diffractive properties, and realization of nonpolarizing narrow-band filtering by reasonably designing the parameter of subwavelength grating is a novel method and approach.

亚波长光栅因光栅参量的不同而具有不同的衍射特性，通过对亚波长光栅参量的合理设计来实现消偏振窄带滤波是一种新的方法与途径。

Based on the mechanism of the fiber Bragg grating's cross-sensitivity to temperature and strain, a new fiber Bragg grating superficial bonded strain sensor with temperature compensation and strain sensibilization was designed and fabricated.

在分析光纤Bragg光栅的温度应变交叉敏感机理的基础上，设计并制作了一种新型的具有温度补偿和应变增敏效果的光纤Bragg光栅表面粘贴式应变传感器。

Presented the settle means of Fiber Bragg Grating sensor's cross-talking problem or simultaneously measu- ring of temperature and strain. Introduced some main problems of Fiber Bragg Grating senso- rs that needed to be solved when it's applied in practical use.

提供了光纤光栅传感器在温度和应变测量中交叉敏感问题的解决办法，介绍了光纤光栅传感器在实际应用中需要解决的几个主要问题。

In order to study the effect of microstructure on the superhydrophobic solid surface for its drag reduction charactertics, micro-ridges grating structures on the basis of K9 glass flat surface were fabricated using femtosecond laser. Experiments were carried out to measure the rheological characterization of 40% glycerin solution on flat and grating structured K9 glass surfaces using AR-G2 rheometer respectively. Both surfaces were modified with trichloro perfluoroocty silane in drying oven.

为了研究超疏水固体表面的微结构对减阻特性的影响，首先利用飞秒激光加工技术在光滑K9玻璃基面上加工出微脊光栅结构，然后将光滑K9玻璃与光栅结构K9玻璃置于干燥箱内进行硅烷化处理，以降低表面自由能，最后用AR-G2流变仪测量两表面的流变特性，试验用流体为体积分数40%的甘油溶液和水。

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。

A laser Doppler grating vibrometer based on the two-phase detecting technique and the rectangular phase grating is experimentally researched.

与传统的测量方法相比，该技术具有测量精度和空间分辨率高、测量范围广、响应快、非接触、并能进行多维测量等特点。

Fiber grating coupler has good wavelength selection characteristic of optical fiber grating as well as multiport advantage of fiber coupler. These features make it easy to realize allfiber optical add/drop multiplex.

光纤光栅耦合器具有光纤光栅良好的波长选择特性和光纤耦合器的多端口特点，易于实现全光纤的光波分插复用。

A simple and novel method for transforming a uniform fiber grating into a linearly chirped grating is presented.

报道一个简单而新颖的、能将均匀光栅改变为线性啁啾光栅的方法。

Based on the filter characteristic of long-period grating, the wavelength-change of sensing grating can be demodulated.

为简化信号解调方法，利用长周期光纤光栅的边沿滤波器特性，实现光纤光栅传感波长的解调。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了