2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42063We study the effects of non-commutative QED (NCQED) in fermion pair production, gamma + gamma to f + \bar{f} and Compton scattering, e + gamma to e + gamma. Non-commutative geometries give rise to 3- and 4-point photon vertices and to momentum dependent phase factors in QED vertices which will have observable effects in high energy collisions. We consider e^+ e^- colliders with energies appropriate to the TeV Linear Collider proposals and the multi-TeV CLIC project operating in gamma gamma and e gamma modes. Non-commutative scales roughly equal to the center of mass energy of the e^+e^- collider can be probed, with the exact value depending on the model parameters and experimental factors. The Compton process is sensitive to Lambda_{NC} values roughly twice as large as those accessible to the pair production process.9 pages, 5 figures, Talk given at the SUSY 2002 Conference (DESY, Hamburg, Germany, June 2002). To appear in the SUSY 2002 Conference ProceedingsHigh Energy Physics - Phenomenologytext