Optimizing free space to few-modefiber coupling efficiency
| Autor: | Huiyuan Liu, Guifang Li, He Wen, Fatemeh Ghaedi Vanani, Alireza Fardoost |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Space division multiplexing
Coupling Physics Signal processing business.industry Free space 01 natural sciences Atomic and Molecular Physics and Optics Computational physics 010309 optics Erbium doped fiber amplifier Optics 0103 physical sciences Coupling efficiency Fiber Electrical and Electronic Engineering business Engineering (miscellaneous) Free-space optical communication |
| Zdroj: | Applied optics. 58(13) |
| ISSN: | 1539-4522 |
| Popis: | We evaluate the coupling efficiency from free space to few-mode fibers (FMF). A theoretical coupling model is developed based on the imaging properties of free-space modes and the inner products between the free-space modes and the FMF modes. Numerical results for six- and ten-mode free-space-to-FMF coupling are presented. It is found that in order to maximize the total coupling efficiency, the size of the highest-order free-space and fiber modes should be approximately matched, and there is an optimum value for the V number of the FMF. In addition, the axial alignment tolerance for free-space-to-FMF coupling is more stringent than for single-mode cases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|