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Optics Letters

Optics Letters


  • Vol. 22, Iss. 12 — Jun. 15, 1997
  • pp: 859–861

Efficient, low-threshold collinear and noncollinear β-barium borate optical parametric oscillators

AnnMarie L. Oien, Iain T. McKinnie, Piyush Jain, Noah A. Russell, Donald M. Warrington, and Lawrie A. W. Gloster  »View Author Affiliations

Optics Letters, Vol. 22, Issue 12, pp. 859-861 (1997)

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The performance of collinear and noncollinear pulsed barium borate optical parametric oscillators with third-harmonic Nd:YAG pumping is analyzed. The effects of tangential phase matching and pump Poynting vector walk-off compensation are shown to enhance noncollinear operation. However, we show that these effects are mutually exclusive for a typeI β-barium borate optical parametric oscillator and furthermore that tangential phase matching is dominant. The selection of a collinear or a noncollinear configuration is determined by pump divergence and spot size as well as by crystal aperture. With a pump divergence of 4mrad, noncollinear operation is optimal. The highest slope efficiency, 37%, and the lowest threshold, 5mJ, are obtained with nearly perfect tangential phase matching. For a pump divergence of less than 2mrad and a similar spot size, collinear operation gives the lowest threshold, 3.2mJ, and the highest slope efficiency, 33%.

© 1997 Optical Society of America

AnnMarie L. Oien, Iain T. McKinnie, Piyush Jain, Noah A. Russell, Donald M. Warrington, and Lawrie A. W. Gloster, "Efficient, low-threshold collinear and noncollinear β-barium borate optical parametric oscillators," Opt. Lett. 22, 859-861 (1997)

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