Tapia Ayuga, CarlosLuis Aina, Alfredo2023-06-192023-06-192014-010031-921x10.1119/1.4849160https://hdl.handle.net/20.500.14352/35039© 2013 American Association of Physics Teachers. All measurements have been performed at the Laboratorio de Investigación Científica Avanzada (LICA-UCM) of the Moncloa Campus of International Excellence (UCM-UPM) with support from the Spanish Programa Nacional de Astronomía y Astrofísica under grant AYA2009-10368 and Consolider-Ingenio 2010 Program grant CSD2006-00070: First Science with the GTC from Spanish MINECO. We thank Dr. R. Weigand for a critical reading of the manuscript and valuable suggestions.engjournal articlehttp://dx.doi.org/10.1119/1.4849160http://scitation.aip.org/open access535PhysicsMultidisciplinaryÓptica (Física)2209.19 Óptica Física