2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83898For the first time an all optical flip-flop is demonstrated based on two coupled Mach-Zehnder interferometers which contain semiconductor optical amplifiers in their arms. The flip-flop operation is discussed and it is demonstrated using commercially available fiber pigtailed devices. Being based on Mach-Zehnder interferometers, the flip-flop has potential for very high speed operation.7 pages, 3 figuresOpticstext