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When an optical frequency comb is incident on a photoconductive antenna (PCA) for terahertz (THz) detection, a THz comb of a photocarrier (PC-THz comb) is generated inside the PCA.This is equivalent to incorporating the function of a THz frequency ruler into the PCA, and can be used for various applications.In this review, we introduce the application of a PC-THz comb for the absolute frequency measurement of CW-THz waves and distance measurement with its phase slope.
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Takeshi Yasui (2022) studied this question.
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