布拉格条件

如果激光器的互作用区漂移管波纹满足布拉格条件，则其分布反馈机理构成了类似于普通激光谐振腔的布拉格腔。

If the corrugated wall in FEL interaction region satisfies the Bragg condition , its distributed feedback mechanism creates a Brgg cavity , like a conventional laser .

最后从体全息理论出发，结合布拉格条件，讨论了多重体全息相位栅的滤波原理。

In the end , the properties of volume holograms and the filtering principles of multiple photorefractive volume gratings are discussed by using volume holograms theory and Bragg condition .

通过控制读出光栅时外加电场的大小使读出光满足或偏离布拉格条件，从而控制衍射效率为1或0，实现开关的交换和直通操作。

By controlling the magnitude of the applied electric field , the readout beam can satisfy or deviate the Bragg condition , which makes the diffraction efficiency be 1 or 0 , and thus realize the exchange or bypass operation of the switch .

考察前一种结构，且满足共振布拉格散射条件，相对局域化长度达到最小值。

For the former structure , and if the resonance Bragg-scattering is satisfied , the relative localization length attains a minimum .

这项工作和光纤布拉格光栅在高温条件下的工程应用紧密相关，对今后研究、制作高性能光纤布拉格光栅具有一定的科学和实际的指导意义。

This work is very useful to the application for fiber Bragg gratings in the large range of temperature , it therefore has important scientific and practical significance .

依据分子呈螺旋型排列的介质的电磁场解计算了给定厚度的手性液晶的光谱反射率与其双折射的关系，依据布拉格反射的干涉条件计算了斜入射光的布拉格反射光谱的蓝移。

Based on the analytic expression of electromagnetic field solution of helical symmetric dielectric material , the paper presents the relationship between spectral reflectivity and birefringence of chiral liquid crystal , and the blue shift of Bragg reflection in the condition of oblique incidence .