光通过螺旋optical fiber和Pancharatnam相位的传播
Light propagation through a coiled optical fiber and Pancharatnam phase
摘要：
澄清了干涉仪的一个或两个光束中存在偏振变化元件所引起的干涉图样变化的性质，特别是由于偏振光束通过盘绕光纤而引起的有效光学活性所引起的干涉图样变化的性质。它指出，对于一个入射状态，这是不是圆偏振，使两个干涉光束去不同的偏振态，有一个可观察到的非零Pancharatnam相移它们之间的依赖于入射偏振态和立体角对着的轨道的$\vec{k}$ -矢量在球的中心的k-矢量。当两个干涉态几乎正交时，这种相移的行为是奇异的。结果表明，当两束光的光程差为零时，光强调制幅度与入射光的偏振态无关。
英文摘要：
The nature of changes in the interference pattern caused by the presence of polarization-changing elements in one or both beams of an interferometer, in particular those caused by an effective optical activity due to passage of a polarized beam through a coiled optical fiber are clarified. It is pointed out that for an incident state that is not circularly polarized so that the two interfering beams go to different polarization states, there is an observable nonzero Pancharatnam phase shift between them which depends on the incident polarization state and on the solid angle subtended by the track of the $\vec{k}$-vector at the centre of the sphere of k-vectors. The behaviour of this phase shift is singular when the two interfering states are nearly orthogonal. It is shown that for zero path difference between the two beams, the amplitude of intensity modulation as a function of optical activity is independent of the incident polarization state.
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