Figure 3
From: Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers
Experimental setup of adaptive sampling THz-DCS.
SFG-XC, sum-frequency-generation cross-correlator; PPLNs, periodically-poled-lithium-niobate crystals; Ls, objective lenses; DP-PCA1, dipole-shaped, low-temperature-grown, GaAs photoconductive antenna for THz emitter; DP-PCA2, dipole-shaped, low-temperature-grown, GaAs photoconductive antenna for THz detector; AMP, current preamplifier.
