title: Terahertz generation with tandem seeded optical parametric generators.
abstract: A simple difference frequency generation (DFG) scheme based on two seeded optical parametric generators is presented as a tunable terahertz (THz) source. Using the nonlinear optical crystal 4-dimethylamino-N-methyl-4-stilbazolium-tosylate (DAST) as the DFG crystal, our system has demonstrated continuous and seamless tunable operation from 1.6 to 4.5 THz. The output bandwidth of the THz source is 2.4 GHz. The utility of the source over this spectral range is demonstrated by measuring a high-resolution transmission spectrum of water vapor in air.
authors.affiliation: Department of Physics and the Electro-Optics Program, University of Dayton, Dayton, Ohio 45469-2314, USA. peter.powers@notes.udayton.edu
authors.forename: P E
authors.initials: PE
authors.lastname: Powers
authors.forename: R A
authors.initials: RA
authors.lastname: Alkuwari
authors.forename: J W
authors.initials: JW
authors.lastname: Haus
authors.forename: K
authors.initials: K
authors.lastname: Suizu
authors.forename: H
authors.initials: H
authors.lastname: Ito