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arXiv · 1610.03510

Dual-scale turbulence in filamenting laser beams at high average power

Elise Schubert·Lorena de la Cruz·Denis Mongin·Jérôme Kasparian·Jean-Pierre Wolf·Sandro Klingebiel·Marcel Schultze·Thomas Metzger·Knut Michel
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Abstract

We investigate the self-induced turbulence of high repetition rate laser filaments over a wide range of average powers (1 mW to 100 W) and its sensitivity to external atmospheric turbulence. Although both externally-imposed and self-generated turbulences can have comparable magnitudes, they act on different temporal and spatial scales. While the former drives the shot-to-shot motion at the millisecond time scale, the latter acts on the 0.5 s scale. As a consequence, their effects are decoupled, preventing beam stabilization by the thermally-induced low-density channel produced by the laser filaments.

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Elise Schubert, Lorena de la Cruz, Denis Mongin, Jérôme Kasparian, Jean-Pierre Wolf, Sandro Klingebiel, Marcel Schultze, Thomas Metzger, Knut Michel. 2016-10-11. Dual-scale turbulence in filamenting laser beams at high average power. https://doi.org/10.1103/physreva.94.043808

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