Journal
OPTICS EXPRESS
Volume 16, Issue 17, Pages 13052-13061Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.16.013052
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japan [18686008, 18650121]
- Grants-in-Aid for Scientific Research [18686008, 18650121] Funding Source: KAKEN
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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 2.8x10(-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. (C) 2008 Optical Society of America.
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