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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 12, Iss. 3 — Sep. 25, 2008
  • pp: 200–204

Temperature Dependent Terahertz Generation at Periodically Poled Stoichiometric Lithium Tantalate Crystal Using Femtosecond Laser Pulses

N.E. Yu, C. Kang, H.K. Yoo, C. Jung, Y.L. Lee, C.S. Kee, D.K. Ko, and J. Lee  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 12, Issue 3, pp. 200-204 (2008)

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Coherent tunable terahertz generation was demonstrated in periodically poled stoichiometric lithium tantalate crystal via difference frequency generation of femtosecond laser pulses. Simultaneous forward and backward terahertz radiations were obtained around 1.35 and 0.63 THz, respectively at low temperature. By cooling the crystal to reduce losses caused by phonon absorptions, the generated THz bandwidth was as narrow as 23GHz at the center frequency of 0.63 THz. The measurement result of temperature-dependent showed gradual intensity increase of the generated terahertz pulse and red shift of the center frequency as the temperature decrease from 291 to 143 K, but insignificant reduction of the spectral bandwidth. Furthermore, the stoichiometric crystal was very suitable for the suppression of THz loss at low temperature compared to the congruent <TEX>$LiNbO_3$</TEX> crystal.

© 2008 Optical Society of Korea

OCIS Codes
(130.3730) Integrated optics : Lithium niobate
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes

Original Manuscript: July 14, 2008
Revised Manuscript: August 11, 2008
Manuscript Accepted: August 11, 2008
Published: September 25, 2008

N.E. Yu, C. Kang, H.K. Yoo, C. Jung, Y.L. Lee, C.S. Kee, D.K. Ko, and J. Lee, "Temperature Dependent Terahertz Generation at Periodically Poled Stoichiometric Lithium Tantalate Crystal Using Femtosecond Laser Pulses," J. Opt. Soc. Korea 12, 200-204 (2008)

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