3D laser-written silica glass step-index high-contrast waveguides for the 3.5 mu m mid-infrared range

Javier Martinez, Airan Rodenas, Toney Fernandez, Javier R. Vazquez de Aldana, Robert R Thomson, Magdalena Aguilo, Ajoy Kumar Kar, Javier Solis, Francesc Diaz

Research output: Contribution to journalArticle

Abstract

We report on the direct laser fabrication of step-index waveguides in fused silica substrates for operation in the 3.5 mu m mid-infrared wavelength range. We demonstrate core-cladding index contrasts of 0.7% at 3.39 mu m and propagation losses of 1.3 (6.5) dB/cm at 3.39 (3.68) mu m, close to the intrinsic losses of the glass. We also report on the existence of three different laser modified SiO2 glass volumes, their different micro-Raman spectra, and their different temperature-dependent populations of color centers, tentatively clarifying the SiO2 lattice changes that are related to the large index changes.

Original languageEnglish
Pages (from-to)5818-5821
Number of pages4
JournalOptics Letters
Volume40
Issue number24
DOIs
Publication statusPublished - 15 Dec 2015

Keywords

  • QUANTUM CASCADE LASERS
  • BULK FUSED-SILICA
  • FEMTOSECOND-LASER
  • CRYSTALS

Cite this

Martinez, J., Rodenas, A., Fernandez, T., Vazquez de Aldana, J. R., Thomson, R. R., Aguilo, M., Kar, A. K., Solis, J., & Diaz, F. (2015). 3D laser-written silica glass step-index high-contrast waveguides for the 3.5 mu m mid-infrared range. Optics Letters, 40(24), 5818-5821. https://doi.org/10.1364/OL.40.005818