Waveguides in Ni-doped glass and glass-ceramic written with a 1 kHz femtosecond laser

doi:10.1016/j.optmat.2014.04.042

Waveguides in Ni-doped glass and glass-ceramic written with a 1 kHz femtosecond laser

Hughes M
Homewood K
Curry R

et al.

Optical Materials (2014) 36(9) 1604-1608

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Abstract

We report waveguides in Ni-doped Li2O-Ga2O3-SiO2(Ni:LGS) glass and glass-ceramic (GC) fabricated with a femtosecond (fs) laser with repetition rate of 1 kHz. When the glass is annealed to form a GC, the waveguides are erased. However, in the GC the waveguides are not erased by annealing. In Ni:LGS GC a 415 nm absorption band was created by fs laser waveguide writing due to the creation of Ni nanoparticles with an estimated diameter of a few nm. Raman and photoluminescence spectra of the bulk and waveguide structures were indistinguishable; however, fluorescence decay profiles indicated more long lifetime components in the waveguide compared to the bulk. © 2014 Elsevier B.V. All rights reserved.