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The Multiplexing of Six Vortex Modes in a Multicore Photonic Quasi-Crystal Fiber
- Source :
- IEEE Photonics Journal, Vol 15, Iss 2, Pp 1-6 (2023)
- Publication Year :
- 2023
- Publisher :
- IEEE, 2023.
-
Abstract
- We propose a photonic quasi-crystal fiber which has five ring-shaped cores in the cross section. It realizes the multiplexing of 6 vortex modes. The fiber is based on SiO2 and has an octuple photonic quasi-crystal structure. It achieves four independent dual-core coupling pairs with the optimization of geometric parameters. By adjusting the thickness of five ring-shaped cores, the fundamental mode (HE11) in the small side ring-shaped fiber cores couple to different higher order vector modes (TE01, HE21, TM01, HE31) in the large center ring-shaped fiber core, which makes the light field transfer from small side cores to large center core and realizes the multiplexing of 6 vortex modes (TE01, $\text{OAM}_{ \pm 1,1}^ \pm $, TM01, $\text{OAM}_{ \pm 2,1}^ \pm $). The transmission characteristics are analyzed with supermode theory. The $\Delta {n}_{\text{eff}}$ of adjacent vector modes is larger than ${10}^{ - 4}$ due to the thin center ring core. The coupling length (${L}_c$) keeps in the order of ${10}^{ - 2}$ m between 1500--1600 nm and the coupling efficiency is larger than 90% in 1550 nm for four dual-core coupling pairs. We believe this design will have great potential in the field of all-fiber vortex mode division multiplexing.
Details
- Language :
- English
- ISSN :
- 19430655
- Volume :
- 15
- Issue :
- 2
- Database :
- Directory of Open Access Journals
- Journal :
- IEEE Photonics Journal
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.be1d60e412e0492580293e34d64be4ef
- Document Type :
- article
- Full Text :
- https://doi.org/10.1109/JPHOT.2023.3257503