2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79726We show experimentally the existence of bright and dark spatial solitons in a passive quantum-well-semiconductor resonator of large Fresnel number. For the wavelength of observation the nonlinearity is mixed absorptive/defocusing. Bright solitons appear more stable than dark ones.4 pages with 7 figuresPattern Formation and Solitonstext