A three suspended-cores fiber (TSF) is proposed. Different to the traditional three-bridge suspended-core fiber, TSF has three suspended-cores with an air-hole in the center. The mode coupling in TSF is analyzed based on the effective area, and the TSF are optimized to support LP₀₁ mode at both C and L wavelength bands and the LP₀₁ mode has only weak coupling between each fiber core. Due to asymmetry fiber core structure and mode compression, the simulated birefringence of the TSF is $9.3\times 10^{-3}$ at 1.55 $\mathrm{\mu }$m. Despite the large refractive index difference between core and cladding, TSF can be tailored to support only LP${}_{01}$ and LP${}_{11}$ modes.

提出了一种三悬芯光纤 (TSF)。与传统的三桥悬芯光纤不同，TSF具有三个悬芯，中间有一个气孔。在TSF模耦合是基于所述有效面积进行分析，该TSF被优化以支持LP ₀₁在两个C和L波段模式和LP ₀₁模式具有每根纤维芯之间仅具有弱的耦合。由于不对称纤芯结构和模式压缩，TSF 的模拟双折射为$9.3\times 10^{-3}$ 在 1.55 $\mathrm{\mu }$米。尽管纤芯和包层之间的折射率差异很大，但可以定制 TSF 以仅支持 LP${}_{01}$ 和LP${}_{11}$ 模式。