Competition effects during femtosecond laser induced element redistribution in Ba- and La-migration based laser written waveguides
Fs-laser induced element redistribution (FLIER) has been a subject of intensive research in recent years. Its application to various types of glasses has already resulted in the production of efficient optical waveguides, tappers, amplifiers and lasers. Most of the work reported on FLIER-based waveg...
| Autores: | , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/8323 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/8323 |
| Access Level: | acceso abierto |
| Palabra clave: | 538.9 Ion migration Electronic polarizability Photonic devices Glass Distributions Inscription Fabrication Fs-laser writing Waveguides Element redistribution Soret effect Diffusion competition effects Física de materiales Física del estado sólido 2211 Física del Estado Sólido |
| Sumario: | Fs-laser induced element redistribution (FLIER) has been a subject of intensive research in recent years. Its application to various types of glasses has already resulted in the production of efficient optical waveguides, tappers, amplifiers and lasers. Most of the work reported on FLIER-based waveguides refers to structures produced by the cross-migration of alkali (Na, K) and lanthanides (mostly La). The latter elements act as refractive index carrying elements. Herein, we report the production of Ba-based, FLIER-waveguides in phosphate glass with an index contrast > 10^(-2). Phosphate glasses modified with the same amount of Na_2O and K_2O, and variable amounts of BaO and/or La_2O_3 were used to produce the FLIER-waveguides with Ba and or La acting as index carriers. Ba-only modified glasses show a waveguide writing threshold and light guiding performance comparable to that of La-based structures. However, mixed Ba-La glasses show a much higher element migration threshold, and much smaller compositionally modified regions. This behavior is consistent with a competition effect in the cross-migration of both elements (Ba and La) against the alkalis. Such an effect can be applied to inhibit undesired element redistribution effects in fs-laser processing applications in multicomponent glasses. |
|---|