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首页> 外文期刊>Optical fiber technology >A bend-resistant low bending loss and large mode area two-layer core single-mode fiber with gradient refractive index ring and multi-trench
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A bend-resistant low bending loss and large mode area two-layer core single-mode fiber with gradient refractive index ring and multi-trench

机译：具有梯度折射率环和多沟槽的抗弯曲低弯曲损耗大模面积两层芯单模光纤

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摘要

We propose a bend-resistant large mode area single-mode fiber with low bending loss. The fiber consists of three parts, including a two-layer core, a gradient refractive index ring and multi-trench. Performance of the proposed fiber is investigated by using a finite element method at 1550 nm wavelength. Large mode area of 2622 mu m(2) at a bend radius of 20 cm can be achieved with the function of the two-layer core and the gradient refractive index ring. The gradient refractive index ring acts as a resonant ring, which also contributes to bend-resistant performance. Bending loss can be reduced to about 0.092 dB/m due to the multi-trench in the cladding, which is also beneficial to improve transmission efficiency. Moreover, the fiber can ensure single-mode operation by exploiting high suppression of the higher order modes. The bending direction has no effect on the performance of the fiber because of the symmetric design.
机译：我们提出了一种具有低弯曲损耗的抗弯曲大模面积单模光纤。光纤由三部分组成，包括两层纤芯，梯度折射率环和多沟槽。通过使用有限元方法在1550 nm波长下研究所提出光纤的性能。借助两层纤芯和梯度折射率环的功能，可以实现在20 cm弯曲半径处具有2622μm（2）的大模态面积。梯度折射率环充当谐振环，这也有助于提高抗弯曲性能。由于包层中的多沟槽，弯曲损耗可以降低到约0.092 dB / m，这也有利于提高传输效率。此外，光纤可以通过对高阶模的高度抑制来确保单模操作。由于对称设计，弯曲方向对光纤的性能没有影响。

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