Gori, F.Martínez Herrero, María RosarioPiquero Sanz, Gemma MaríaSande, J. C. G. deKorotkova, O.Santarsiero, M.2025-12-112025-12-112022-03-24F. Gori, R. Martínez-Herrero, G. Piquero, J. C. G. de Sande, O. Korotkova, and M. Santarsiero, "On z-coherence in self-focusing," Opt. Lett. 47, 1681-1684 (2022)0146-959210.1364/ol.455449https://hdl.handle.net/20.500.14352/128806©2022 Optica Publishing GroupBoth the intensity distribution and the degree of coherence between pairs of points along the propagation axis (z-coherence) are derived in closed form for a phenomenon of self-focusing produced by circularly coherent light. The first confirms results previously obtained numerically, while the second exhibits new complex features. The physical interpretation is obtained by a suitable pseudo-modal expansion that suggests an analogy with a simple two-mode structure.engjournal article1539-4794https://dx.doi.org/10.1364/ol.455449https://opg.optica.org/ol/fulltext.cfm?uri=ol-47-7-1681https://arxiv.org/abs/2501.14357open access535BeamsÓptica (Física)2209 Óptica