摘要
采用有限元方法对“类矩形”保偏光纤的应力双折射进行了分析,给出了保偏光纤横截面上的应力分布图形及应力双折射分布曲线;应用全矢量电磁场有限元方法,计算了保偏光纤的两个偏振模场的分布、传输常数及模式双折射.在给定模拟条件下,纤芯的应力双折射约为 3. 33×10-4,其模式双折射约为 3. 72×10-4.计算结果表明,这种“类矩形”保偏光纤与其它保偏光纤相比,有几个明显的优点,即有更佳的应力传递效果、均匀的应力场分布、更大的应力双折射.
The stress-inducing birefringence of the 'pseudo-rectangle' polarization-maintaining optical fiber (PMF) was analyzed by finite element method, and its stress distributions curve and stress birefringence distributions were presented. This fiber's polarization modes, transmitting constants and modal birefringence were computed by the full vector finite element method. The stress and modal birefringence is about 3.33 x 10(-4) and 3.72 x 10(-4) in simulation conditions, respectively. The results of computation demonstrate that the 'pseudo-rectangle' polarization-maintaining optical fiber has a number of obvious advantages with comparisons of the panda shaped fiber or the bow-tie shaped fiber: it is better in the stress transmitting effect, more uniform in the stress field distribution in fiber core and bigger in the stress-inducing birefringence.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期45-48,共4页
Journal of Infrared and Millimeter Waves
基金
国家 863计划项目(2002AA312280)
关键词
保偏光纤
应力双折射
偏振模
模场
纤芯
场分布
布图
矩形
常数
横截面
optoelectron
birefringence
finite element method
polarization-maintaining optical fiber (PMF)
stress
modal analysis
