共 10 条
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
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.
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页码:859 / 861
页数:3
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