Propagation of polarised light in bent hi-bi spun fibres

被引:8
作者
Przhiyalkovsky, Ya V. [1 ,2 ]
Morshnev, S. K. [1 ,2 ]
Starostin, N. I. [1 ,2 ]
Gubin, V. P. [1 ,2 ]
机构
[1] Russian Acad Sci, VA Kotelnikov Inst Radio Engn & Elect, Fryazino Branch, Fryazino 141190, Moscow Region, Russia
[2] Profotech CJSC, Moscow 121357, Russia
关键词
bent hi-bi spun fibre; polarisation; current sensor;
D O I
10.1070/QE2015v045n11ABEH015813
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The evolution of polarisation states (PS's) of broadband light propagating through a bent optical fibre with a helical structure of its refractive index anisotropy (hi-bi spun fibre) has been studied theoretically and experimentally. It has been shown that there exists a coordinate system of PS's in which the differential Jones matrix can be replaced by a diagonal matrix, which allows the polarisation parameters of the output broadband light to be readily calculated with sufficient accuracy. We have derived a formula for evaluating the magneto-optical sensitivity of a bent spun fibre. An approach has been proposed for restoring the degree of polarisation of light in a bent hi-bi spun fibre and, as a consequence, the visibility (contrast) of the interferometer in a current sensor with a sensing element based on the fibre under consideration.
引用
收藏
页码:1075 / 1082
页数:8
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