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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 6 — Mar. 15, 2014
  • pp: 1649–1652

Terahertz wave parametric amplifier

Saroj R. Tripathi, Yuusuke Taira, Shin’ichiro Hayashi, Kouji Nawata, Kousuke Murate, Hiroaki Minamide, and Kodo Kawase  »View Author Affiliations


Optics Letters, Vol. 39, Issue 6, pp. 1649-1652 (2014)
http://dx.doi.org/10.1364/OL.39.001649


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Abstract

The importance of terahertz (THz) wave techniques has been demonstrated in various fields, and the range of applications is now expanding rapidly. However, the practical implementation of THz science to solve the real-world problems is restricted due to the lack not only of convenient high power THz wave emitters and sensitive detectors but also of efficient quasi-optical active devices such as amplifiers. In this work, we demonstrate the direct amplification of THz waves in room temperature using magnesium oxide-doped lithium niobate (MgO:LiNbO3) crystals as the nonlinear gain medium. The input THz wave is injected as a seed beam along with the pump beam into the nonlinear crystal and it is amplified by the optical parametric process. We report gain in excess of 30 dB with an input THz pulse energy of less than 1 pJ. We believe that this demonstration will contribute to the convenience and further applicability of THz frequency techniques.

© 2014 Optical Society of America

OCIS Codes
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Nonlinear Optics

History
Original Manuscript: December 26, 2013
Manuscript Accepted: February 4, 2014
Published: March 13, 2014

Citation
Saroj R. Tripathi, Yuusuke Taira, Shin’ichiro Hayashi, Kouji Nawata, Kousuke Murate, Hiroaki Minamide, and Kodo Kawase, "Terahertz wave parametric amplifier," Opt. Lett. 39, 1649-1652 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-6-1649


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