Yanqiu Xie, Baojian Wu, Feng Wen. Influence of Refractive Index Perturbation on Mode Extinction Ratio in Few-Mode Fibers[J]. Acta Optica Sinica, 2020, 40(23): 2306005
- Acta Optica Sinica
- Vol. 40, Issue 23, 2306005 (2020)
Fig. 1. Cases with the refractive index perturbation independent of the propagation direction. (a) Core misalignment; (b) structure mismatching
Fig. 2. Optical power evolution of two modes for the single mode input. (a) γ=0; (b) γ=2
Fig. 3. Effect of refractive index perturbation on modal extinction ratio
Fig. 4. Mode extinction ratio of mode combination Cm.n in the multimode fiber at different lengths, in which Cm.n represents the pattern combination of patterns m and n
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Table 1. Parameters of few-mode fiber with the refractive index perturbation
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