Tunable narrow band difference frequency THz wave generation in DAST via dual seed PPLN OPG

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-sti...

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Bibliographic Details
Published in:Optics express 2015-02, Vol.23 (3), p.3669-3680
Main Authors: Dolasinski, Brian, Powers, Peter E, Haus, Joseph W, Cooney, Adam
Format: Article
Language:English
Online Access:Get full text
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Summary: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.
ISSN:1094-4087
DOI:10.1364/OE.23.003669