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Optics Letters

Optics Letters


  • Vol. 24, Iss. 14 — Jul. 15, 1999
  • pp: 978–980

First-order type II quasi-phase-matched UV generation in periodically poled KTP

S. Wang, V. Pasiskevicius, J. Hellström, F. Laurell, and H. Karlsson  »View Author Affiliations

Optics Letters, Vol. 24, Issue 14, pp. 978-980 (1999)

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Type II quasi-phase matching was employed for first-order frequency doubling of a single-longitudinal-mode Ti:sapphire laser in periodically poled KTP with a domain-inverted period of 9.01 μm . In a single-pass configuration, 0.44 mW of UV power at 398.8 nm was generated for an input of 780 mW, corresponding to a normalized conversion efficiency of 0.09%W<sup>-1</sup> cm<sup>-1</sup> . The nonlinear coefficient d<sub>24</sub> = 2.82 pm/V was deduced from the measurements. The larger grating period for the type II quasi-phase-matched second-harmonic-generation process than for type I quasi-phase matching, lowers the fabrication constrains in the short-wavelength region and increases the acceptance bandwidth.

© 1999 Optical Society of America

OCIS Codes
(160.4330) Materials : Nonlinear optical materials
(190.2620) Nonlinear optics : Harmonic generation and mixing

S. Wang, V. Pasiskevicius, J. Hellström, F. Laurell, and H. Karlsson, "First-order type II quasi-phase-matched UV generation in periodically poled KTP," Opt. Lett. 24, 978-980 (1999)

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