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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 21, Iss. 12 — Dec. 1, 2004
  • pp: 2191–2196

Thermally induced dephasing in periodically poled KTP frequency-doubling crystals

Zhi M. Liao, Stephen A. Payne, Jay Dawson, Alex Drobshoff, Chris Ebbers, Dee Pennington, and Luke Taylor  »View Author Affiliations

JOSA B, Vol. 21, Issue 12, pp. 2191-2196 (2004)

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A thermally induced spatial and temporal dephasing model of second-harmonic generation has been developed to describe the conversion efficiency and its degradation of periodically poled potassium titanium phosphate (PPKTP) in a cw, single-pass frequency conversion system. The model confirms the experimental data that show that second-harmonic power greater than 800 mW (15 kW/cm2) causes two-photon nonlinear absorption, leading to time-dependent photochromic damage in PPKTP. This added absorption degrades the conversion efficiency from an initial value of 19% to an unrecoverable asymptotic value of ∼8% in 2 h at 145 kW/cm2 of pump intensity through thermal detuning phase mismatch.

© 2004 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4360) Nonlinear optics : Nonlinear optics, devices
(190.4400) Nonlinear optics : Nonlinear optics, materials

Zhi M. Liao, Stephen A. Payne, Jay Dawson, Alex Drobshoff, Chris Ebbers, Dee Pennington, and Luke Taylor, "Thermally induced dephasing in periodically poled KTP frequency-doubling crystals," J. Opt. Soc. Am. B 21, 2191-2196 (2004)

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