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Asymmetric-clad multi-trench fibers with large mode-area and controlled leakage loss

机译：具有大模式区域的非对称包层多沟纤维和受控漏损

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摘要

This paper proposes design of asymmetric-clad hybrid multi-trench fibers (MTFs) with high-index arc to compensate the mode-area distortion at the commercial packaging radius of 7.5 cm for doped fiber laser applications. The effectively single-mode operation and low bending loss constraints are ensured by delocalizing higherorder modes through resonant coupling and gaps in outer trenches. A full-vectorial finite-element method is used to obtain the modal characteristics of proposed large mode-area hybrid MTF designs. The modified hybrid MTF exhibits an effective mode-area of similar to 1300 mu m(2) and high differential bending loss ratio of 120 between high-order modes and fundamental mode with power fraction of 71% in core at the bending radius of 7.5 cm.
机译：本文提出了具有高折射率电弧的非对称包混合多沟纤维（MTFS）的设计，以补偿掺杂光纤激光器应用7.5cm的商业包装半径下的模式区域变形。通过在外部沟槽中通过谐振耦合和间隙划分高阶模式来确保有效的单模操作和低弯曲损耗约束。全矢量图有限元方法用于获得所提出的大型模式混合MTF设计的模态特性。改进的混合MTF具有与1300μm（2）的有效模式区，高级别和基本模式之间的高差分弯曲损失比为7.5厘米的芯片的电力分数为71％ 。

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