2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85587A method to generate ultrahigh intense electromagnetic fields is suggested, based on the laser pulse compression, carrier frequency upshift and focusing by a counter-propagating breaking plasma wave, relativistic flying parabolic mirror. This method allows us to achieve the quantum electrodynamics critical field (Schwinger limit) with present day laser systems.5 pages, 2 figures; http://wwwapr.apr.jaeri.go.jp/aprc/e/results/simulation/timur/mirror/Plasma PhysicsComputational PhysicsGeneral PhysicsSpace Physicstext