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arXiv 1202.4404physics.opticscond-mat.dis-nncond-mat.mes-hall
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通过泵浦的主动空间控制驯服随机激光器

Taming random lasers through active spatial control of the pump

Nicolas Bachelard, Jonathan Andreasen, Sylvain Gigan, Patrick Sebbah

摘要:

主动控制的泵浦空间分布的建议行使控制随机激光发射。我们证明了数值选择任何所需的激光模式的发射光谱。迭代优化方法,首先在政权的强散射模式是空间本地化,可以很容易地选择使用本地泵浦。值得注意的是,这种方法有效地工作,即使在弱散射制度,其中强烈的空间重叠的模式排除空间选择性。发现了一个复杂的优化泵浦分布,它选择所需的激射模式,在他人的代价,从而展示了强大的和可控的单模操作的随机激光器的泵浦整形的潜力。

英文摘要:

Active control of the pump spatial profile is proposed to exercise control over random laser emission. We demonstrate numerically the selection of any desired lasing mode from the emission spectrum. An iterative optimization method is employed, first in the regime of strong scattering where modes are spatially localized and can be easily selected using local pumping. Remarkably, this method works efficiently even in the weakly scattering regime, where strong spatial overlap of the modes precludes spatial selectivity. A complex optimized pump profile is found, which selects the desired lasing mode at the expense of others, thus demonstrating the potential of pump shaping for robust and controllable singlemode operation of a random laser.

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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