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  • Title: Coaxial waveguide mode reconstruction and analysis with THz digital holography.
    Author: Wang X, Xiong W, Sun W, Zhang Y.
    Journal: Opt Express; 2012 Mar 26; 20(7):7706-15. PubMed ID: 22453449.
    Abstract:
    Terahertz (THz) digital holography is employed to investigate the properties of waveguides. By using a THz digital holographic imaging system, the propagation modes of a metallic coaxial waveguide are measured and the mode patterns are restored with the inverse Fresnel diffraction algorithm. The experimental results show that the THz propagation mode inside the waveguide is a combination of four modes TE₁₁, TE₁₂, TM₁₁, and TM₁₂, which are in good agreement with the simulation results. In this work, THz digital holography presents its strong potential as a platform for waveguide mode charactering. The experimental findings provide a valuable reference for the design of THz waveguides.
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