Papp A, Harms H
Appl Opt. 1975 Oct 1;14(10):2406-11. doi: 10.1364/AO.14.002406.
An investigation of the polarization optical properties of index-gradient glass fibers confirmed the applicability of the linear birefringent model to fibers of this type. The phase retardation (delta(s) = 58 degrees /cm) is homogeneously distributed along the whole length of the fiber. The depolarization occurring when the incident polarization angle coincides with the fast (or slow) axis of the fiber is negligibly small. The measuring technique employed allows the phase retardation between the wave components in the privileged directions within the fiber to be determined as a function of the temperature (Deltadelta(s)/DeltaT = 0.09 degrees /K cm). As the fiber is twisted the polarization vector rotates synchronously with the twisted endface of the fiber.
对折射率渐变玻璃纤维的偏振光学特性进行的研究证实了线性双折射模型对这类纤维的适用性。相位延迟（δ(s) = 58度/厘米）沿纤维的整个长度均匀分布。当入射偏振角与纤维的快（或慢）轴重合时发生的去偏振非常小，可以忽略不计。所采用的测量技术能够确定纤维内优先方向上波分量之间的相位延迟随温度的变化情况（Δδ(s)/ΔT = 0.09度/开尔文·厘米）。当纤维被扭转时，偏振矢量与纤维的扭转端面同步旋转。
