1) local volume photorefractive holographic gratings
局域光折变体全息光栅
1.
Both dynamic mechanisms and diffraction characteristics of the local volume photorefractive holographic gratings recorded by two finite bounded plane waves in doubly doped LiNbO_3∶Fe∶Mn crystals are investigated,by taking into account both the band transport model and two-dimensional coupled-wave theory.
数值计算结果表明,局域光折变体全息光栅的空间电荷场在空间上呈不均匀分布。
2) local volume holographic grating
局域体全息光栅
1.
Based on the two-dimensional coupled-wave theory,the wave-front conversion by local volume holographic grating between cylindrical and plane waves in 90° recording geometry is investigated.
利用一维耦合波理论研究了入射方向相互垂直的一束平面波与一束柱面波干涉形成光折变局域体全息光栅的波前转换情况。
3) photorefractive volume holographic grating
光折变体全息光栅
1.
Considering the dispersion effect of the grating media,the coupled wave theory of Kogelnik was developed to study the diffraction properties of an ultra-short pulsed laser beam with different polarization states by a photorefractive volume holographic grating.
在Kogelnik耦合波理论的基础上,考虑光栅记录介质的色散效应的影响,研究了光折变体全息光栅对不同偏振状态的超短脉冲激光光束衍射的性质,讨论了高斯型入射脉冲激光光束的谱宽与光栅的有效衍射谱宽之比不同时,衍射和透射光束的光谱宽度、时间宽度、波形和衍射效率的变化。
4) photorefractive hologram grating
光折变全息光栅
5) crossed-beam photorefractive gratings
局域体光栅
1.
Based on the two-center nonvolatile holographic recording method and the theory model combining band transport model with the two-dimensional coupled-wave equations, the numerical simulation method is used to study the photorefractive formation and diffractive properties of the crossed-beam photorefractive gratings.
为研究局域体光栅的光折变形成机制及衍射特性,以双中心非挥发全息记录方案为基础,将带输运模型与二维耦合波理论相结合,采用数值模拟的方法,研究紫外敏化光强和记录红光总光强的变化对LiNbO_3:Fe:Mn晶体中局域体光栅的影响,并给出定影结束时平均折射率调制、衍射光波振幅及衍射效率的模拟结果。
6) volume holographic grating
体全息光栅
1.
The study of H-PDLC volume holographic grating with high diffraction efficiency;
高频高衍射效率H-PDLC体全息光栅的研究
2.
The coupled wave equations of volume holographic grating in photorefractive single-axis crystal in the discretional direction of the optical axis are derived in terms of proper coordinate transformation and Kogelnik s one-dimensional coupled wave theory.
利用坐标旋转方法和Kogelnik耦合波理论,建立了光轴方向任意时单轴晶体中体光栅布拉格衍射的耦合波方程,分析了Li NbO3晶体的光轴方向对光折变体全息光栅的各向同性和各向异性布拉格衍射性质的影响。
3.
Based on the three- dimensional coupled wave theory, the theory of diffraction of local volume holographic gratings recorded with arbitrary polarization plane waves is studied.
基于三维耦合波理论 ,研究了两束有限宽度的任意偏振平面波干涉产生的局域体全息光栅的衍射问题。
补充资料：超导电性的局域和非局域理论（localizedandnon-localizedtheoriesofsuperconductivity）
超导电性的局域和非局域理论（localizedandnon-localizedtheoriesofsuperconductivity）
伦敦第二个方程（见“伦敦规范”）表明，在伦敦理论中实际上假定了js(r)是正比于同一位置r的矢势A(r)，而与其他位置的A无牵连；换言之，局域的A(r)可确定该局域的js(r)，反之亦然，即理论具有局域性，所以伦敦理论是一种超导电性的局域理论。若r周围r'位置的A(r')与j(r)有牵连而影响j(r)的改变，则A(r)就为非局域性质的。由于`\nabla\timesbb{A}=\mu_0bb{H}`，所以也可以说磁场强度H是非局域性的。为此，超导电性需由非局域性理论来描绘，称超导电性的非局域理论。皮帕德非局域理论就是典型的超导电性非局域唯象理论。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条