We report a widely tunable narrowband terahertz (THz) source via difference frequency generation (DFG). A narrowband THz source uses the output of dual seeded periodically poled lithium niobate (PPLN) optical parametric generators (OPG) combined in the nonlinear crystal 4-dimthylamino-N-methyl-4-stilbazolium-tosylate (DAST). We demonstrate a seamlessly tunable THZ output that tunes from 1.5 THz to 27 THz with a minimum bandwidth of 3.1 GHz. The effects of dispersive phase matching, two-photon absorption, and polarization were examined and compared to a power emission model that consisted of the current accepted parameters of DAST.
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Optical Society of America
Dolasinski, Brian; Powers, Peter E.; Haus, Joseph W.; and Cooney, Adam, "Tunable Narrow Band Difference Frequency THz Wave Generation in DAST via Dual Seed PPLN OPG" (2015). Electro-Optics and Photonics Faculty Publications. 43.