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arXiv 2109.04902physics.optics
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利用调谐无序控制多模laser中的非线性相互作用

Controlling nonlinear interaction in a many-mode laser by tuning disorder

Yaniv Eliezer, Simon Mahler, Asher A. Friesem, Hui Cao, Nir Davidson

摘要:

具有非线性模式相互作用的多模激光器可以作为研究多体物理的模型系统。然而,在宽范围内精确和连续地调节相互作用强度是具有挑战性的。在这里,我们提出了一种独特的方法来控制激光模式结构的随机相位起伏的近简并腔。我们的数值和实验表明,作为相位波动的特征尺度减少了两个数量级,横向模式变得支离破碎,减少其空间重叠抑制模式的竞争增益,允许更多的模式激光。我们的系统的可调性,灵活性和鲁棒性提供了一个强大的平台,研究多体现象。

英文摘要:

A many-mode laser with nonlinear modal interaction could serve as a model system to study many-body physics. However, precise and continuous tuning of the interaction strength over a wide range is challenging. Here, we present a unique method for controlling lasing mode structures by introducing random phase fluctuation to a nearly degenerate cavity. We show numerically and experimentally that as the characteristic scale of phase fluctuation decreases by two orders of magnitude, the transverse modes become fragmented and the reduction of their spatial overlap suppresses modal competition for gain, allowing more modes to lase. The tunability, flexibility and robustness of our system provides a powerful platform for investigating many-body phenomena.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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