The refractive index changes induced by the linear electro-optic effect in normal-poled and reverse-poled LiNbO_3 wave-guides were calculated,and the results that show the refractive index changes in two arms are opposite to each other when the electric field is applied in +z direction,which agree with the experimental results.
对正常型和反转极化型LiNbO3 波导在任意方向加电场 ,由线性电光效应引起的折射率的变化做了计算分析 ,结果发现只有在z方向加电场 ,LiNbO3 两波导臂折射率的变化才是完全相反的。
Some new achievements are discussed,including high-power linac accelerator,solid-state detector modules with high detection efficiency and fast reconstruction algorithm using rotating polar-coordinate backprojection.
本文主要介绍了清华大学在高能射线工业CT研究及产业化方面的新进展,介绍了其中的多项成果:小体积、大功率的直线加速器,低噪声、高效率的阵列固体探测器,旋转极坐标反投影快速图像重建算法等。