TY - JOUR
T1 - Mode analysis of orbital angular momentum modes carrying multi-mode ring-core fibers
AU - Tu, Jiajing
AU - Lu, Quanchao
AU - Wang, Zhuo
AU - Gao, Shecheng
AU - Liu, Weiping
AU - Yu, Changyuan
AU - Li, Zhaohui
AU - Lu, Chao
N1 - Funding Information:
This research was sponsored by National Key R&D Program of China2019YFA0706300 from Ministry of Science and Technology, China; National Natural Science Foundation of China (NSFC) (Grant No. U2001601, U1701661); Guangzhou basic and applied basic research foundation, China (Grant No. 202002030327).
Funding Information:
This research was sponsored by National Key R&D Program of China 2019YFA0706300 from Ministry of Science and Technology, China; National Natural Science Foundation of China (NSFC) (Grant No. U2001601 , U1701661 ); Guangzhou basic and applied basic research foundation, China (Grant No. 202002030327 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/15
Y1 - 2021/11/15
N2 - We discuss the mode properties for orbital angular momentum (OAM) modes supporting multi-mode ring-core fiber (MM-RCF). For strongly-guiding MM-RCF, by introducing one more layer to the ring-core, a two-layer ring-core fiber (TL-RCF) is proposed. It is proven that this TL-RCF can increase the separation degree between the vector eigenmodes and meanwhile weaken the spin–orbit coupling. For mode-group supporting MM-RCF, the maximum mode number is limited by the thickness of ring-core and the cut-off of radial higher-order mode. We also present the tradeoff relationship between the mode group effective index difference and inter-eigenmode differential mode delay in one mode group. The discussion in this paper can give guidance for the design of MM-RCF.
AB - We discuss the mode properties for orbital angular momentum (OAM) modes supporting multi-mode ring-core fiber (MM-RCF). For strongly-guiding MM-RCF, by introducing one more layer to the ring-core, a two-layer ring-core fiber (TL-RCF) is proposed. It is proven that this TL-RCF can increase the separation degree between the vector eigenmodes and meanwhile weaken the spin–orbit coupling. For mode-group supporting MM-RCF, the maximum mode number is limited by the thickness of ring-core and the cut-off of radial higher-order mode. We also present the tradeoff relationship between the mode group effective index difference and inter-eigenmode differential mode delay in one mode group. The discussion in this paper can give guidance for the design of MM-RCF.
KW - Mode analysis
KW - Orbital angular momentum
KW - Ring-core fiber
KW - Space division multiplexing
UR - http://www.scopus.com/inward/record.url?scp=85111303297&partnerID=8YFLogxK
U2 - 10.1016/j.optcom.2021.127314
DO - 10.1016/j.optcom.2021.127314
M3 - Journal article
AN - SCOPUS:85111303297
SN - 0030-4018
VL - 499
JO - Optics Communications
JF - Optics Communications
M1 - Article number 127314
ER -