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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 2 — Jan. 28, 2013
  • pp: 1395–1403

Second-harmonic generation in periodically poled bulk Rb-doped KTiOPO4 below 400 nm at high peak-intensities

Andrius Zukauskas, Valdas Pasiskevicius, and Carlota Canalias  »View Author Affiliations


Optics Express, Vol. 21, Issue 2, pp. 1395-1403 (2013)
http://dx.doi.org/10.1364/OE.21.001395


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Abstract

We demonstrate that bulk Rb-doped KTiOPO4 (RKTP) shows improved susceptibility to gray-tracking compared to flux-grown KTiOPO4. We show high-fidelity periodic poling of 1 mm thick RKTP with a period of 3.18 µm for second harmonic generation at 398 nm with a normalized conversion efficiency of 1.79%/Wcm. The crystal is used to frequency-double 138 fs-long pulses with an efficiency of 20% and a peak intensity of 560 MW/cm2 without visible gray-tracking signs. We demonstrate that two-photon absorption is the predominant mechanism limiting the SHG efficiency in this spectral range at high peak powers and high repetition rates.

© 2013 OSA

OCIS Codes
(160.2260) Materials : Ferroelectrics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.4400) Nonlinear optics : Nonlinear optics, materials

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 28, 2012
Revised Manuscript: December 19, 2012
Manuscript Accepted: December 30, 2012
Published: January 14, 2013

Citation
Andrius Zukauskas, Valdas Pasiskevicius, and Carlota Canalias, "Second-harmonic generation in periodically poled bulk Rb-doped KTiOPO4 below 400 nm at high peak-intensities," Opt. Express 21, 1395-1403 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-2-1395


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