The R-index is proposed as a universal metric that quantifies total orbital angular momentum content and mode purity for arbitrary structured optical fields, from single Laguerre-Gaussian modes to multi-vortex superpositions.
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The R-index: A universal metric for evaluating OAM content and mode purity in optical fields
The R-index is proposed as a universal metric that quantifies total orbital angular momentum content and mode purity for arbitrary structured optical fields, from single Laguerre-Gaussian modes to multi-vortex superpositions.