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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 18 — Sep. 3, 2007
  • pp: 11706–11713

Efficient terahertz generation by optical rectification at 1035 nm

Matthias C. Hoffmann, Ka-Lo Yeh, János Hebling, and Keith A. Nelson  »View Author Affiliations

Optics Express, Vol. 15, Issue 18, pp. 11706-11713 (2007)

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We demonstrate efficient generation of THz pulses by optical rectification of 1.03 um wavelength laser pulses in LiNbO3 using tilted pulse front excitation for velocity matching between the optical and THz fields. Pulse energies of 100 nJ with a spectral bandwidth of up to 2.5 THz were obtained at a pump energy of 400 uJ and 300 fs pulse duration. This conversion efficiency of 2.5×10-4 was an order of magnitude higher than that obtained with collinear optical recitification in GaP, and far higher still than that measured using ZnTe in an optimized geometry. Using a simple model we demonstrate that two- and three-photon absorption strongly limit the THz generation efficiency at high pump fluences in ZnTe and GaP respectively.

© 2007 Optical Society of America

OCIS Codes
(160.3730) Materials : Lithium niobate
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(260.3090) Physical optics : Infrared, far

ToC Category:
Nonlinear Optics

Original Manuscript: July 6, 2007
Revised Manuscript: August 23, 2007
Manuscript Accepted: August 25, 2007
Published: August 29, 2007

Matthias C. Hoffmann, Ka-Lo Yeh, János Hebling, and Keith A. Nelson, "Efficient terahertz generation by optical rectification at 1035 nm," Opt. Express 15, 11706-11713 (2007)

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