Ulrich R, Simon A
Appl Opt. 1979 Jul 1;18(13):2241-51. doi: 10.1364/AO.18.002241.
In twisted single-mode optical fibers the polarization of light is affected by an elastooptically induced optical activity and by a modification of any linear birefringence present. These effects are discussed theoretically and demonstrated experimentally. The activity/twist ratio is alpha/tau approximately 0.13 ... 0.16 universally in weakly guiding silica fibers. Twisted fibers may be used as polarization rotators. A fiber with a +/-68 degrees double twist operates as a fast/slow mode interchanger, suitable for delay equalization.
在扭曲的单模光纤中，光的偏振受到弹光诱导的光学活性以及所存在的任何线性双折射变化的影响。对这些效应进行了理论讨论并通过实验进行了验证。在弱导石英光纤中，活性/扭曲比α/τ普遍约为0.13…0.16。扭曲光纤可用作偏振旋转器。具有±68度双扭曲的光纤可作为快/慢模式交换器，适用于延迟均衡。
