【摘要】 针对光纤陀螺的应用,提出了一种双层反谐振负曲率空芯光纤。首先,利用时域有限差分法数值分析方法,建立光纤微结构模型,经优化设计取得了限制损耗0.063 dB/km且单模大模场的结构参数。同时,探索了保偏设计,通过调整内层两侧管环壁厚取得了在1 dB/km较低损耗量级上达到10^-5高双折射水平。最后,考察了光纤弯曲时弯曲半径与损耗的关系,为进一步优化设计奠定了基础。更多还原

【Abstract】 A double-layer anti-resonance negative-curvature hollow-core fiber is proposed. Firstly, the microstructure model is established by the numerical analysis method of finite-difference time-domain. After design, the structural parameters of limiting loss of 0.063 dB/km and large mode-field-diameter single-mode are obtained. The polarization maintaining design is explored. By adjusting the thickness of the inner tube ring on both sides of the inner layer, a high birefringence level of 10^-5 is achieved at a lower loss level of 1 dB/km. Finally, the relationship between the bending radius and the loss of the fiber is investigated, which lays a foundation for the further optimization design.更多还原