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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 23 — Nov. 7, 2011
  • pp: 22692–22697

A novel multipass scheme for enhancement of second harmonic generation

Tetsuo Harimoto, Boku Yo, and Kosuke Uchida  »View Author Affiliations

Optics Express, Vol. 19, Issue 23, pp. 22692-22697 (2011)

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We present experimental evidence of enhancement of the second-harmonic generation by using a multipass non-collinear phase-matching configuration for a Q-switched nanosecond-kilohertz Nd:YVO4 laser. In comparison with the single-pass configuration, the enhancement factor of the second-harmonic laser with the two-pass configuration is up to 2.5 in a type I beta-barium borate crystal, which can be further increased by adding the third-pass through the crystal. In addition, we provide a general relationship between the phase-matching angle and tilting azimuth angles of the unconverted fundamental and second-harmonic lasers. The multipass non-collinear phase-matching configuration is capable of reducing a thermal effect due to the absorption in the crystal and effectively avoiding damages on the crystal surfaces.

© 2011 OSA

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(190.2620) Nonlinear optics : Harmonic generation and mixing
(140.3515) Lasers and laser optics : Lasers, frequency doubled

ToC Category:
Nonlinear Optics

Original Manuscript: September 26, 2011
Revised Manuscript: October 16, 2011
Manuscript Accepted: October 17, 2011
Published: October 26, 2011

Tetsuo Harimoto, Boku Yo, and Kosuke Uchida, "A novel multipass scheme for enhancement of second harmonic generation," Opt. Express 19, 22692-22697 (2011)

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