布拉格光纤是由在径向折射率呈周期分布的多层介质圆环构成的一种光纤。
Bragg fibers are a kind of fiber formed by multilayer concentric cylinders with period index distribution in the radial.
结果表明，轴向折射率梯度在一定条件下可以补偿径向折射率梯度的影响。
Results show that the axial index gradient can compensate the effect caused by radial index gradient in some cases.
该光瞳滤波器由两个平行偏光镜，一个电光晶体与一个径向对称双折射晶体组成。
It consists of two parallel polarizers, an electro-optical crystal and a birefringent crystal with radial symmetry.
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