随着太赫兹技术的逐渐成熟，太赫兹数字全息术作为其中重要的发展方向之一，已经逐渐在众多科研和工业领域显示了强大的应用实力。近些年太赫兹全息术取得了长足的进展，包括系统的开发和应用。建立了一套具有高分辨率、高信噪比、偏振测量能力的太赫兹全息成像系统。同时，将此系统应用到了对平板太赫兹元件的性能表征，对太赫兹波导进行模式测量，对会聚太赫兹波产生的Gouy相移进行观测。这些工作对最终将太赫兹数字全息术用于实际具有积极的推动作用。

With the maturation of terahertz (THz) technology, the THz digital holography, which is one of the most important development directions, gradually exhibits the application powers in various research and industrial fields. The work in the improvement and applications of the THz digital holography in recent years is discussed. A THz holographic imaging system with a high spatial resolution, high signal to noise ratio, and polarization information measurement ability is built. Furthermore, it is demonstrated that this imaging system can be used to check the performances of THz planar elements, measure transmission modes of the THz waveguide, and observe the Gouy phase shift of the converging THz beam. This work is valuable for promoting the practicability of the THz digital holography.