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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 8 — Mar. 10, 2014
  • pp: 1518–1522

Evaluation of polarized terahertz waves generated by Cherenkov phase matching

Takuya Akiba, Yasuhiro Akimoto, Koji Suizu, Katsuhiko Miyamoto, and Takashige Omatsu  »View Author Affiliations

Applied Optics, Vol. 53, Issue 8, pp. 1518-1522 (2014)

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We report terahertz (THz) wave generation by satisfying Cherenkov phase-matching condition in both s and p polarizations. A dual-wavelength optical parametric oscillator is constructed from two potassium titanium oxide phosphate crystals pumped by a frequency-doubled Nd:YAG laser. By rotating the orientation of both a lithium niobate crystal (LiNbO3) and the polarization of the pump waves, the polarization of the THz wave changes. Due to the difference in the refractive index and absorption, the output power for p polarization is one tenth that for s polarization. A tuning range from 0.2 to 6.5 THz is obtained for s polarization, and from 0.2 to 4.2 and 5.4 to 6.9 THz for p polarization. The extraction efficiency is improved by changing the angle of prism for p polarization, and a large phase change occurs at total internal reflection. Consequently, p-polarized THz waves are optimal for spectroscopic applications.

© 2014 Optical Society of America

OCIS Codes
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(190.4223) Nonlinear optics : Nonlinear wave mixing

ToC Category:
Nonlinear Optics

Original Manuscript: December 6, 2013
Revised Manuscript: January 27, 2014
Manuscript Accepted: January 29, 2014
Published: March 4, 2014

Takuya Akiba, Yasuhiro Akimoto, Koji Suizu, Katsuhiko Miyamoto, and Takashige Omatsu, "Evaluation of polarized terahertz waves generated by Cherenkov phase matching," Appl. Opt. 53, 1518-1522 (2014)

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