摘要
推导用斯托克斯参数表示的光纤应力计算公式 .指出在一个无损耗单元内 ,从一个偏振态到另一个偏振态的任何变化 ,都对应着庞加莱球相对于直径的一个旋转 .如果令球的半径为R =k(相位应力系数 ) ,则压应力F可用球与S2 OS3 平面相交圆上的一段大圆弧表示 .当入射光为线偏振光时 ,若单模光纤无固有双折射 ,则F =k[tg-1 (S3 /S2 ) ];若单模光纤存在固有双折射 ,可将固有双折射看成一初始附加压力F0 的作用结果 .给出斯托克斯参数测量值和光纤应力计算值 ,并比较实际外加应力 。
A formula is derived for calculating fiber stress showing by stokes parameter. In a lossless unit, any change from a polarization state to another polarization state is pointed out to be corresponded to a rotation of Poincare sphere relative to the diameter. Let the radius of sphere be egual to phase stress factor k , then, the pressure stress F can be shown by a section of orthodrome on the circle where the sphere and the S 2OS 3 plane intersect. When the incident light is linearly polarized light and there is no inherent birefringence in single mode fibre optical, then, F=k [tg -1 ( S 3/S 2 )]; when there is inherent birefringence in single mode fibre optical, the inherent birefringence can be seen as result from the action of an initially additional pressure F 0. The measured value of stokes parameter and calculated value of fiber stress are compared with actually applied stress. The results conform to actual state.
出处
《华侨大学学报（自然科学版）》
CAS
2004年第1期34-36,共3页
Journal of Huaqiao University(Natural Science)
基金
国务院侨务办公室科研基金资助项目 (0 2QZR0 3)
