One axis guided random laser emission from a glass capillary composite
Nenhuma Miniatura disponível
Data
2019-07-01
Autores
Alves, Caroline Cassia
Lima Ribeiro, Sidney José [UNESP]
Mendonça, Cleber Renato
de Boni, Leonardo
Almeida Caiut, José Maurício
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Random lasers are structures in which light is both, multiply scattered and amplified. The present study uses Rhodamine B and organic-inorganic hybrid materials to investigate the random lasing properties of silica capillary systems. The composite was prepared by dispersing the dye into an aluminoxane-epoxy-siloxane hybrid together with Boehmite powder, which are subsequently used to fill fused silica capillaries. In this system, Rhodamine B and Boehmite particles act at the same time as a gain and scattering medium, respectively. Random laser emission was performed by using the second harmonic of a 100-ps Nd:YAG laser as pump source; a typical laser threshold behavior was observed for a pumping fluency of 6 μJ/mm 2 . The random laser emission spectrum also displays a tunable behavior. This resulted from a combination of the broad emission spectrum of the dye with the different Boehmite particle sizes allied with the advantage of the capillary geometry.
Descrição
Palavras-chave
Coherent feedback, Photonic devices, Random lasers, Rhodamine B
Como citar
Journal of Luminescence, v. 211, p. 426-430.