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

被引：20

作者：

Oien, AL ^{[1
]}

McKinnie, IT ^{[1
]}

Jain, P ^{[1
]}

Russell, NA ^{[1
]}

Warrington, DM ^{[1
]}

Gloster, LAW ^{[1
]}

机构：

[1] UNIV MANCHESTER, DEPT PHYS & ASTRON, MANCHESTER M13 9PL, LANCS, ENGLAND

来源：

OPTICS LETTERS | 1997年 / 22卷 / 12期

关键词：

D O I：

10.1364/OL.22.000859

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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 type I beta-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 4 mrad, noncollinear operation is optimal. The highest slope efficiency, 37%, and the lowest threshold, 5 mJ, are obtained with nearly perfect tangential phase matching. For a pump divergence of less than 2 mrad and a similar spot size, collinear operation gives the lowest threshold, 3.2 mJ, and the highest slope efficiency, 33%. (C) 1997 Optical Society of America.

引用

页码：859 / 861

页数：3

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