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Nearly diffraction-limited signal generated by a lower beam-quality pump in an optical parametric oscillator

机译:由光学参量振荡器中较低光束质量的泵产生的近衍射极限信号

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摘要

The beam quality of an optical parametric oscillator (OPO) within a singly resonant, confocal-positive branch unstable resonator is investigated. Resonator configurations have been found in which the beam quality of the outgoing signal exceeds the beam quality of the pump. Cavity magnification and pump-pulse duration are found to determine the signal beam quality. It is shown that signal M~(2) decreases with increasing pump-pulse duration for a given cavity magnification. In an experimental demonstration of a LiNbO_(3) OPO within an unstable resonator, pumped by a multitransversal mode beam, a signal beam with an almost-single transversal mode has been generated, whereas the multitransversal mode behavior of the pump beam is projected on the idler beam.
机译:研究了单谐振,共焦-正分支不稳定谐振器内光学参量振荡器(OPO)的光束质量。已经发现谐振器配置,其中输出信号的光束质量超过泵浦的光束质量。找到腔放大率和泵浦脉冲持续时间来确定信号束质量。结果表明,对于给定的腔放大率,信号M〜(2)随着泵浦脉冲持续时间的增加而减小。在一个不稳定的共振器中的LiNbO_(3)OPO的实验演示中,通过多横向模式光束泵浦,生成了具有几乎单横向模式的信号束,而泵浦光束的多横向模式行为则投射到了惰轮。

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  • 来源
    《Applied optics》 |2003年第6期|共4页
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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
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