Makris, Konstantinos G.Psaltis, Demetri2025-08-262025-08-262025-08-252025-06-2310.1109/cleo/europe-eqec65582.2025.11109574https://infoscience.epfl.ch/handle/20.500.14299/253521Wavefront shaping methods by spatial light modulators, have been an invaluable tool for a plethora of applications in photonics of complex media [1]. In fact in a series of ground-breaking experiments, reverse propagation by phase conjugation was used to create tight focusing of light inside complex media and multimode optical fibers [2], [3]. Here we addressing the problem of tight focusing in multimode fibers, in the context of non-Hermitian photonics [4], [5], by relying on singular value decomposition (SVD) techniques.entext::conference output::conference proceedings::conference paper