Fluorescence imaging of lattice re-distribution on step-index direct laser written Nd: YAG waveguide lasers

Jon Martinez de Mendivil, Airan Rodenas, Antonio Benayas, Magdalena Aguilo, Francesc Diaz, Alberto Perez Delgado, Gines Lifante, Daniel Jaque, Ajoy K. Kar

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Abstract

The laser performance and crystalline micro-structural properties of near-infrared step-index channel waveguides fabricated inside Neodymium doped YAG laser ceramics by means of three-dimensional sub-picosecond pulse laser direct writing are reported. Fluorescence micro-mapping of the waveguide cross-sections reveals that an essential crystal lattice re-distribution has been induced after short pulse irradiation. Such lattice re-distribution is evidenced at the waveguide core corresponding to the laser written refractive index increased volume. The waveguides core surroundings also present diverse changes including slight lattice disorder and bi-axial strain fields. The step-index waveguide laser performance is compared with previous laser fabricated waveguides with a stress-optic guiding mechanism in absence of laser induced lattice re-distribution. (C) 2015 AIP Publishing LLC.

Original languageEnglish
Article number023112
Number of pages5
JournalJournal of Applied Physics
Volume117
Issue number2
DOIs
Publication statusPublished - 14 Jan 2015

Keywords

  • CERAMICS
  • SPECTROSCOPY
  • PERFORMANCE
  • DIELECTRICS
  • EMISSION
  • CRYSTALS
  • PULSES
  • YAG

Cite this

Martinez de Mendivil, J., Rodenas, A., Benayas, A., Aguilo, M., Diaz, F., Perez Delgado, A., Lifante, G., Jaque, D., & Kar, A. K. (2015). Fluorescence imaging of lattice re-distribution on step-index direct laser written Nd: YAG waveguide lasers. Journal of Applied Physics, 117(2), [023112]. https://doi.org/10.1063/1.4905318