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。
When a volume holographic grating is readout under off-Bragg condition, determining the direction of the diffracted beam is an important issue in the coupled-wave theory of volume gratings.
体全息光栅的读出偏离布拉格条件时，衍射光方向的确定是体光栅耦合波理论中的一个重要问题。
The sensor construction is that one Bragg grating is stuck on the inner center of two bars against each other, and the reinforcement volume as well as the diameter will expand due to corrosion.
钢筋腐蚀将导致钢筋体积大大增加，混凝土保护层开裂、剥落，结构承载力下降，甚至倒塌。
In the sensor, Bragg grating is stick on the top surface of two bars against each other, for which the principle is that the steel volume will be expanded due to corrosion.
这种传感器将光纤布拉格光栅粘贴固定于两根紧密排列的钢筋上表面。
In the sensor, Bragg grating is stick on the top surface of two bars against each other, for which the principle is that the steel volume will be expanded due to corrosion.
这种传感器将光纤布拉格光栅粘贴固定于两根紧密排列的钢筋上表面。
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