Abstract
We constructed terahertz time-domain spectroscopy (THz-TDS) systems using compact probe heads, which are connected with large-mode-area photonic crystal fibers (LMA PCFs), which in turn are used for guiding ultra-short optical pulses to THz probe heads. The LMA-PCF based THz-TDS system had comparable THz radiation power and bandwidth with those obtained by a conventional THz-TDS system with free-space optical arrangement. This is because LMA PCFs are suitable for high-power delivery without introducing non-linear effects.
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