In the article [1] we calculated the power coupling efficiency of the incident beam to the m-th mode of the fiber according to Eq. (2) and the results were presented in Fig. 2. We recently discovered that our calculation used incorrect values of$H_m^{*}$. We have corrected the error and the revised result is shown in Fig. 1 . The three highest-coupled modes are presented in Fig. 1. The new result shows that the incident beam which is linearly polarized along the x-axis only excites the x-polarized modes. A dominant power is coupled into the HE_11X mode, which achieves a highest coupling efficiency of 88.3% when${\omega }_0/\sqrt{ab}=0.65$.

 

Fig. 1 Power coupling efficiencies for the three highest-coupled modes in an elliptical DMHF at 1 THz as a function of the spot size to core size ratio${\omega }_0/\sqrt{ab}$.

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