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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 10985–10994

Cavity-enhanced generation of 6 W cw second-harmonic power at 532 nm in periodically-poled MgO:LiTaO3

Iolanda Ricciardi, Maurizio De Rosa, Alessandra Rocco, Pietro Ferraro, and Paolo De Natale  »View Author Affiliations

Optics Express, Vol. 18, Issue 11, pp. 10985-10994 (2010)

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We report on efficient cw high-power second harmonic generation in a periodically poled LiTaO3 crystal placed in a resonant enhancement cavity. We tested three configurations, differing in the coupling mirror reflectivity, and a maximum conversion efficiency of about 76%, corresponding to 6.1 W of green light with 8.0 W of fundamental power, was achieved. This is, to the best of our knowledge, the highest cw power ever reported using a periodically-poled crystal in an external cavity. We observed photo-thermal effect induced by photon absorption at the mirrors and in the crystal, which however does not affect stable operation of the cavity. A further effect arises for two out of the three configurations, at higher values of the input power, which degrades the performance of the locked cavity. We suggest this effect is due to the onset of competing nonlinearities in the same crystal.

© 2010 Optical Society of America

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

ToC Category:
Nonlinear Optics

Original Manuscript: February 18, 2010
Revised Manuscript: March 12, 2010
Manuscript Accepted: March 15, 2010
Published: May 11, 2010

Iolanda Ricciardi, Maurizio De Rosa, Alessandra Rocco, Pietro Ferraro, and Paolo De Natale, "Cavity-enhanced generation of 6 W cw second-harmonic power at 532 nm in periodically-poled MgO:LiTaO3," Opt. Express 18, 10985-10994 (2010)

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