2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44922The feasibility of detecting the photon-photon interaction using Fabry-Perot type laser interferometers developed for gravity wave detection is demonstrated. An ``external'' laser beam, serving as a refractive medium, is alternatively fed into the cavities of the interferometer and made to collide with the ``internal'' beams thereby inducing a measurable phase difference between them.10 pages, Revtex 3.0High Energy Physics - PhenomenologyGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext