Highly dispersive coupled ring-core fiber for orbital angular momentum modes
Highly dispersive coupled ring-core fiber for orbital angular momentum modes
复制标题
用于轨道角动量模式的高色散耦合环芯光纤
DOI：
10.1063/5.0025615
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发表时间：
2020
影响因子：
4
通讯作者：
Yue Y
中科院分区：
文献类型：
--
作者：
Geng WP;Li YQ;Fang YX;Wang YN;Bao CJ;Yan Y;Wang Z;Zhang WG;Huang H;Ren YX;Pan ZQ;Yue Y
在这项工作中，我们提出并设计了一个高色散耦合环芯光纤（CRF）与两个同心的高折射率环使用肖特玻璃的轨道角动量（OAM）模式。通过适当地选择光纤几何参数，所提出的CRF中支持的OAM 130，1模式在1260.4 nm处具有-20 271 ps/（nm km）的大负色散（CD）。我们还表明，建议的CRF可能是一个很好的候选人的各种CD相关的应用OAM模式的光纤。OAM 3，1模的色散在1491 nm处可以达到−75 273 ps/（nm km）。此外，几何参数对不同的OAM模式的色散的影响进行了研究。调整内环或外环的参数对色散峰值的影响较大，而同时移动两个高折射率环主要改变交叉波长的位置。
In this work, we propose and design a highly dispersive coupled ring-core fiber (CRF) with two concentric high-index rings using Schott glass for orbital angular momentum (OAM) modes. By properly selecting the fiber geometrical parameters, the OAM130,1 mode supported in the proposed CRF has a large negative chromatic dispersion (CD) of −20 271 ps/(nm km) at 1260.4 nm. We also show that the proposed CRF could be an excellent candidate for various CD-related applications of OAM modes in the optical fiber. The dispersion of the OAM3,1 mode can reach down to −75 273 ps/(nm km) at 1491 nm. Furthermore, the effect of the geometrical parameters on chromatic dispersion for different OAM modes is investigated. Adjusting the parameters of the inner ring or the outer ring could greatly influence the peak value of the dispersion, while moving the two high-index rings at the same time mainly changes the position of the crossing wavelength.