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. 2015 Mar 13;5:9077. doi: 10.1038/srep09077

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(a, b) Numerical mode profiles of the LP₀₁ and total E-field distribution of four modes (TE₀₁ and TM₀₁, HE_21,e, HE_21,o) in the LP₁₁set, (c, d) experimental beam profiles of the fundamental LP₀₁ and the higher order LP₁₁ modes, respectively. The horizontal dashed lines represent the orientation of maximum intensity (e) E-field distribution of the LP₀₁ and LP₁₁ mode set of a 2 μm microfibre along the direction indicated by the dashed line in (a) and (b).