title: Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation.
abstract: A tunable dual-wavelength double-pass singly resonant optical parametric oscillator based on a single KTP crystal has been proposed and demonstrated. By setting the rear mirror tuning angle precisely, collinear and noncollinear dual phase matching can be established simultaneously and leads to a two-wavelength oscillation at steady state. With high-speed KTP angle tuning, two wavelengths and their frequency difference can be adjusted continuously and accurately. By using this newly developed dual-wavelength optical parametric oscillator to pump a DAST crystal, a monochromatic terahertz wave ranging from 0.5 to 3 THz has been successfully generated in a difference-frequency generation system.
authors.affiliation: RIKEN ASI, 519-1399, Aramaki, Aoba, Sendai 980-0845, Japan. tangming@riken.jp
authors.forename: Ming
authors.initials: M
authors.lastname: Tang
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Minamide
authors.forename: Yuye
authors.initials: Y
authors.lastname: Wang
authors.forename: Takashi
authors.initials: T
authors.lastname: Notake
authors.forename: Seigo
authors.initials: S
authors.lastname: Ohno
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Ito