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DOE OSTI · 1877925

Iterative wavefront optimization of ultrafast laser beams carrying orbital angular momentum

Burger, M.·Murphy, J. M.·Finney, L. A.·Peskosky, N.·Nees, J. A.·Krushelnick, K.·Jovanovic, I.
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Abstract

Structured intense laser beams offer degrees of freedom that are highly attractive for high-field science applications. However, the performance of high-power laser beams in these applications is often hindered by deviations from the desired spatiotemporal profile. This study reports the wavefront optimization of ultrafast Laguerre-Gaussian beams through the synergy of adaptive optics and genetic algorithm-guided feedback. The results indicate that the intensity fluctuations along the perimeter of the target ring-shaped profile can be reduced up to ~15%. Furthermore, the radius of the ring beam profile can be tailored to a certain extent by establishing threshold fitting criteria. The versatility of this approach is experimentally demonstrated in conjunction with different focusing geometries.

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Burger, M., Murphy, J. M., Finney, L. A., Peskosky, N., Nees, J. A., Krushelnick, K., Jovanovic, I.. 2022-07-05. Iterative wavefront optimization of ultrafast laser beams carrying orbital angular momentum. https://doi.org/10.1364/oe.464063

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