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Random Laser Action in Nd:YAG Crystal Powder

Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alameda Urquijo s/n, Bilbao 48013, Spain
Materials Physics Center, CSIC-UPV/EHU, San Sebastián 20018, Spain
Author to whom correspondence should be addressed.
Academic Editor: Giorgio Biasiol
Materials 2016, 9(5), 369;
Received: 29 February 2016 / Revised: 11 April 2016 / Accepted: 6 May 2016 / Published: 13 May 2016
(This article belongs to the Special Issue Solid-State Laser Materials)
PDF [1536 KB, uploaded 13 May 2016]


This work explores the room temperature random stimulated emission at 1.064 μm of a Nd:YAG crystal powder (Neodymium-doped yttrium aluminum garnet) in a very simple pump configuration with no assistance from an internal mirror. The laser threshold energy as a function of pump beam area and pump wavelength has been measured, as well as the temporal dynamics of emission pulses. The absolute energy of stimulated emission and the absolute laser slope efficiency have been measured by using a method proposed by the authors. The results show a surprising high efficiency that takes the low Nd3+ ion concentration of the crystal powder into account. View Full-Text
Keywords: random lasers; crystal powder; neodymium random lasers; crystal powder; neodymium

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Azkargorta, J.; Iparraguirre, I.; Barredo-Zuriarrain, M.; García-Revilla, S.; Balda, R.; Fernández, J. Random Laser Action in Nd:YAG Crystal Powder. Materials 2016, 9, 369.

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