Abstract
An all-fiber LP01-LP11 mode convertor based on side-polished small-core single-mode fibers (SMFs) is numerically demonstrated. The linearly polarized incident beam in one arm experiences π shift through a fiber half waveplate, and the side-polished parts merge into an equivalent twin-core fiber (TCF) which spatially shapes the incident LP01 modes to the LP11 mode supported by the step-index few-mode fiber (FMF). Optimum conditions for the highest conversion efficiency are investigated using the beam propagation method (BPM) with an approximate efficiency as high as 96.7%. The proposed scheme can operate within a wide wavelength range from 1.3 μm to1.7 μm with overall conversion efficiency greater than 95%. The effective mode area and coupling loss are also characterized in detail by finite element method (FEM).
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This work has been supported by the Fundamental Research Funds for the Central Universities (No.2016JBM002).
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Liu, Y., Li, Y. & Li, Wd. LP01 to LP11 mode convertor based on side-polished small-core single-mode fiber. Optoelectron. Lett. 14, 88–91 (2018). https://doi.org/10.1007/s11801-018-7234-7
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DOI: https://doi.org/10.1007/s11801-018-7234-7