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Opt Lett. 2010 May 15;35(10):1698-700. doi: 10.1364/OL.35.001698.

Dual-wavelength single-crystal double-pass KTP optical parametric oscillator and its application in terahertz wave generation.

Author information

  • 1RIKEN ASI, 519-1399, Aramaki, Aoba, Sendai 980-0845, Japan. tangming@riken.jp

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.

PMID:
20479854
[PubMed]
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