摘要
采用全矢量平面波方法,以聚甲基丙烯酸甲酯(PMMA)为基材,对椭圆孔聚合物光子晶体光纤的偏振特性和传输性质进行了研究。结果表明,椭圆孔聚合物光子晶体光纤的双折射是由于包层的不对称性引起的全局双折射。椭圆率η愈大,其基模双折射愈强,在η=3.0时,双折射最高可达5.312×10-2,比普通光纤的模式双折射10-5高出3个数量级。零走离点对应的波长也比普通保偏光纤长,随着椭圆率的增大,走离曲线将向长波长方向移位,零走离点发生红移。零走离点的出现,将有效地抑制一阶偏振模色散。
Polarization properties and propagation characteristics of polymer photonic crystal fibers （PCFs） with elliptical air-holes and hexagonal structure are investigated by using the full vectorial plane wave method. The results show that the birefringence of the fiber is induced by asymmetries of the cladding. The modal birefringence of a PCF is 5.312×10^-2 at the elliptical ratio η=3.0. The numerical results show that the modal birefringence of PCF is three orders of magnitude higher than the conventional polarization-maintaining fibers （PMFs）. Moreover, by adjusting the elliptical ratio of cladding, we find the optimized design parameters of the fiber with birefringence. Zero walk-off point occurs at a wavelength longer than that of convention elliptical PMF. With increasing elliptical ratio, the walk-off curve and zero walk-off point would shift towards the long wavelength region. The occurrence of zero walk-off point can efficiently restrain the first-order polarization mode dispersion.
出处
《激光与光电子学进展》
CSCD
北大核心
2011年第8期99-103,共5页
Laser & Optoelectronics Progress
基金
国家第43批博士后科学基金(20080431258)
陕西省科学技术研究计划项目(2010K01-078)
陕西省教育厅自然科学专项基金(2010JK403)
宝鸡文理学院重点项目(ZK1015
ZK1016)资助课题
关键词
光纤光学
偏振特性
全矢量平面波方法
聚合物
高双折射
fiber optics
polarization properties
full vectorial plane wave method
polymer
high birefringence
