Article Dans Une Revue Optical Materials Année : 2025

3D luminescent waveguides micromachining by femtosecond laser inscription in niobium germanate glass

Résumé

Three-dimensional (3D) microstructures were written by femtosecond (fs) laser aiming to manufacture waveguides inside niobium germanate glasses. The laser-induced damage threshold using 1030 nm fs-laser irradiation was investigated, and the waveguides were written in different fluences. The morphology, structural information and refractive index changes of microstructures were discussed. The waveguide cross-section microscopy data shows an elliptical shape with a diameter varying with the applied pulse energy. The micro-Raman maps demonstrate the occurrence of structural modifications with different microregions along the laser propagation direction. The refractive index profiles point to the formation of at least one microregion containing a positive refractive index change along the laser propagation. Guided light transmission measurements demonstrate the formation of single-mode waveguides inscribed at low pulse energy (up to 132 nJ) and an emitting waveguide in the rare-earth-doped sample. The visible luminescent response of erbium ions in the waveguide output was demonstrated and supports the possibility of using these core waveguides for future 3D multi-functional photonic devices operating in the visible region.

Domaines

Matériaux
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Avant la publication
lundi 16 juin 2025
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lundi 16 juin 2025
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Dates et versions

hal-04919411 , version 1 (30-01-2025)

Identifiants

Citer

Lia Mara Marcondes, Juliane Resges Orives, Lucas Konaka Nolasco, Sabrina N.C. Santos, Cleber Renato Mendonça, et al.. 3D luminescent waveguides micromachining by femtosecond laser inscription in niobium germanate glass. Optical Materials, 2025, 159, pp.116562. ⟨10.1016/j.optmat.2024.116562⟩. ⟨hal-04919411⟩
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