Symmetric supermodes in cyclic multicore fibers
| Autor: | Ávila, B. Jaramillo, Hernández, J. Naya, Rodríguez, S. Ma. Toxqui, Rodríguez-Lara, B. M. |
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| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | OSA Continuum 2, 515 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OSAC.2.000515 |
| Popis: | Nearest-neighbor coupled-mode theory is a powerful framework to describe electromagnetic-wave propagation in multicore fibers but it lacks precision as the separation between cores decreases. We use abstract symmetries to study a ring of evenly distributed identical cores around a central core, a common configuration used in telecommunications and sensing. We find its normal modes and their effective propagation constants while including the effect of all high-order inter-core couplings. Finite-element simulations support our results to good agreement. Only two of these effective modes involve fields in all the cores. These two modes display opposite-sign phase configurations between the fields in the external cores and the central core. These two modes still appear in the limit where the external cores become a continuous ring. Our results might help improve predictions for crosstalk in telecommunications or precision in sensing applications. Comment: 13 pages, 3 figures |
| Databáze: | arXiv |
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