Publications associated with Plasma Theory

Measuring the orbital angular momentum of high-power laser pulses

Physics of Plasmas AIP Publishing 27 (2020) 053107

R Aboushelbaya, K Glize, A Savin, M Mayr, B Spiers, R Wang, N Bourgeois, C Spindloe, R Bingham, P Norreys

In this article, we showcase the experimental results of methods to produce and characterize orbital angular momentum (OAM) carrying high-power lasers. The OAM pulses were produced on the ASTRA laser of the Central Laser Facility using a continuous spiral phase plate. Three different characterization methods were then used to measure the OAM content of the beam. The methods that were used were a cylindrical lens diagnostic, an interferometric diagnostic, and a projective diagnostic. We further discuss the relative advantages and disadvantages of each method in the context of high-power laser experiments.

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