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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 7 — Mar. 1, 2009
  • pp: 1366–1370

Maximization of second-harmonic power using normal-cut nonlinear crystals in a high-enhancement external cavity

Yugo Onoda, Michihiko Ikeda, Kazuhiko Sugiyama, Haruhisa Yokoyama, and Masao Kitano  »View Author Affiliations

Applied Optics, Vol. 48, Issue 7, pp. 1366-1370 (2009)

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When an antireflection-coated normal-cut nonlinear crystal is used in an external cavity for the generation of high second-harmonic power, a small residual reflection at the crystal facets causes a round-trip loss and prevents the realization of a large fundamental enhancement. This problem is eliminated when the reflected beams at the crystal facets are subject to constructive interference. We demonstrate that the temperature tuning of a β - BaB 2 O 4 crystal of at most 3 K is sufficient to realize constructive interference at any wavelength. We achieve an enhancement factor of 125, and a second-harmonic power of 125 mW is generated at 398 nm from a fundamental power of 390 mW .

© 2009 Optical Society of America

OCIS Codes
(140.4780) Lasers and laser optics : Optical resonators
(190.4360) Nonlinear optics : Nonlinear optics, devices
(140.3515) Lasers and laser optics : Lasers, frequency doubled

ToC Category:
Lasers and Laser Optics

Original Manuscript: August 22, 2008
Revised Manuscript: November 18, 2008
Manuscript Accepted: November 25, 2008
Published: February 23, 2009

Yugo Onoda, Michihiko Ikeda, Kazuhiko Sugiyama, Haruhisa Yokoyama, and Masao Kitano, "Maximization of second-harmonic power using normal-cut nonlinear crystals in a high-enhancement external cavity," Appl. Opt. 48, 1366-1370 (2009)

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