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Homogeneous broadening effect on temperature dependence of green upconversion luminescence in erbium doped fibers Egatz-Gómez, Ana Gómez Calderón, Óscar Melle Hernández, Sonia Carreño Sánchez, Fernando Antón Revilla, Miguel Ángel Gort, Elske M. 535.57 621.391.6 535.37 Upconversion Erbium doped fiber Homogeneous broadening Excited state absorption Óptica (Física) Teoría de los quanta Fibras y comunicación óptica Óptica no líneal 2209.19 Óptica Física 2210.23 Teoría Cuántica 2209.5 Fibras ópticas 2209.13 Óptica no lineal Received 31 July 2012, Revised 27 December 2012, Accepted 14 February 2013, Available online 24 February 2013 We study the green upconversion luminescence of Er3+ ions in an aluminosilicate optical fiber upon near infrared excitation at 787 nm. The dependence of the upconversion luminescence on temperature has been determined. As temperature drops from room to cryogenic temperatures, the upconversion green emission reaches a maximum around 40 K, and then decreases. A nearly quadratic dependence of the upconversion luminescence with excitation power is found, which is consistent with a sequential stepwise two-photon absorption process. These results have been explained with a semiclassical model that considers the inhomogeneous broadening of the optical transitions due to glass imperfections, and the dependence of the homogeneous linewidth broadening on temperature. Ministerio de Ciencia e Innovación de España (MICINN) Universidad Complutense de Madrid (España) Banco Santander (España) Sección Deptal. de Óptica (Óptica) Fac. de Óptica y Optometría TRUE pub 2023-06-19T15:15:42Z 2023-06-19T15:15:42Z 2013-06 journal article https://hdl.handle.net/20.500.14352/35631 0022-2313 10.1016/j.jlumin.2013.02.033 eng FIS2010-22082 GR35/10-910133 restricted access application/pdf Elsevier Science BV