Influence of the fraction of absorbed pump power on the performance of Nd3+:YVO4  powder random lasers

Niklaus U. Wetter; Danilo A. A. da Silva; Ernesto Jimenez-Villar; Julia M. Giehl

doi:10.1117/12.2290674

22 February 2018 Influence of the fraction of absorbed pump power on the performance of Nd³⁺:YVO₄ powder random lasers

Niklaus U. Wetter, Danilo A. A. da Silva, Ernesto Jimenez-Villar, Julia M. Giehl

Proceedings Volume 10528, Optical Components and Materials XV; 105281U (2018) https://doi.org/10.1117/12.2290674
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Understanding light absorption in random lasers and its distribution within the scattering gain media is a key issue to increase the lasers’ efficiency. Here we compare monodispersed and polydispersed powders of Nd³⁺:YVO₄ and investigate the influence of the powder size distribution on scattering mean free path, absorption volume and, eventually, the lasers efficiency. The highest efficiency is achieved for polydispersed powders and we conjecture that these polydispersed powders, composed of pockets containing small grains trapped between large particles, present locally higher pump power densities than the monodispersed powders. We establish a figure of merit, based on measurable powder parameters, that agrees well with the obtained output power results of the monodispersed and polydispersed samples.

Citation Download Citation

Niklaus U. Wetter, Danilo A. A. da Silva, Ernesto Jimenez-Villar, and Julia M. Giehl "Influence of the fraction of absorbed pump power on the performance of Nd³⁺:YVO₄ powder random lasers", Proc. SPIE 10528, Optical Components and Materials XV, 105281U (22 February 2018); https://doi.org/10.1117/12.2290674

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