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  • Title: Terahertz spectrum analyzer based on a terahertz frequency comb.
    Author: Yokoyama S, Nakamura R, Nose M, Araki T, Yasui T.
    Journal: Opt Express; 2008 Aug 18; 16(17):13052-61. PubMed ID: 18711544.
    Abstract:
    Precision frequency measurements of terahertz (THz) waves are required to establish metrology in the THz spectral region. However, frequency measurement techniques in this region are immature. We propose a THz spectrum analyzer to measure the absolute frequency and spectral shape of continuous-wave THz waves. Based on a stable frequency comb generated in a photoconductive antenna, the absolute frequency of a sub- THz test source was determined at a precision of 2.8 x 10(-11). Furthermore, the spectral bandwidth of the THz spectrum analyzer can be extended over 1 THz, as demonstrated by measurement of a THz test source. This spectrum analyzer has the potential to become a powerful tool for THz frequency metrology.
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