摘要
本文介绍了基于普通单模光纤弯曲双折射效应而构成的光纤波片装置原理及设计方法。通过实验研究得到了对氦氖激光(波长0.6328μm)光纤半波片及1/4波片的最佳结构参数。这种光纤波片制作简单,尺寸小,是干涉型光纤传感器中进行偏振态控制以实现全光纤系统的重要元件。
Ordinary single-mode fiber optic polarization controllers are described, by using the stress linear birefringence induced by bending the fiber. The principle and design of fiber wave plates completely equivalent to fractional wave plates of classical optics is presented. Halfwave and quarterwave plates are made by coiling the optic fiber in loops . For 0.6328 fan laser light, optimal halfwave plate is obtained by coiling the fiber with diameter of 125μm in two turns of 2.2 cm radius, and optimal quarterwave plate is in one turn of 2.2 cm radius. Halfwave plate and quarterwave plate can be combined to control polarization of light to any states inside single-mode fiber by adjusting the angles of two such fiber coils. Because the devices have advantage of simplicity and compact and can be used in line, they are very useful in interferential fiber-optic sensors as a polarization controller to realize an all fiber system.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1992年第6期B335-B338,共4页
Acta Aeronautica et Astronautica Sinica
基金
航空科学基金
关键词
双折射
波片
单模光纤
single-mode fibre, birefringence, wave plate
