论文部分内容阅读
提出了一种在大波长范围内具有高双折射和小有效模场面积的光子晶体光纤。采用全矢量有限元法分析了该光纤的模场分布、有效模场面积、有效折射率以及偏振保持等特性。分析结果表明,该光纤的双折射很容易达到10-3量级,其双折射值高于传统六角芯型保偏光子晶体光纤。此外,该光纤的有效模场面积比传统六角芯型保偏光子晶体光纤的小,这降低了光纤的损耗和弯曲损耗。适合应用于偏振特性及弯曲不敏感性要求都较高的实际光纤传感系统,例如光纤陀螺。
A photonic crystal fiber with high birefringence and small effective mode field area in a large wavelength range is proposed. The full-field finite element method was used to analyze the mode field distribution, effective mode field area, effective refractive index and polarization maintaining. The analysis results show that the birefringence of the fiber can easily reach the order of 10-3, and its birefringence value is higher than that of the conventional hexagonal core type polarization maintaining photonic crystal fiber. In addition, the effective mode field area of the optical fiber is smaller than that of a conventional hexagonal core type polarization maintaining photonic crystal fiber, which reduces the optical fiber loss and bending loss. Suitable for practical optical sensing systems with high polarization and bending insensitivity, such as fiber optic gyros.