Femtosecond laser writing of photonic devices in borate glasses compositionally designed to be laser writable
| Autor: | António Dias, Rosalía Serna, A. Alvarez, Javier Solis, Julia Atienzar, Francisco Muñoz, Pedro Moreno-Zarate, Marina García Pardo, Paloma Fernández, Ana Urbieta |
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| Rok vydání: | 2018 |
| Předmět: |
Optical amplifier
Materials science business.industry Ion migration chemistry.chemical_element Borate glass 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Atomic and Molecular Physics and Optics Numerical aperture law.invention 010309 optics Optics chemistry law 0103 physical sciences Femtosecond Photonics 0210 nano-technology Boron business |
| Zdroj: | Optics letters. 43(11) |
| ISSN: | 1539-4794 |
| Popis: | The design and performance of borate glass samples compositionally pre-designed to be femtosecond laser writable via laser-induced ion migration is reported in this Letter. It is demonstrated that borate glasses modified on purpose with small amounts of La2O3 and Na2O can be straightforwardly used to produce high-index contrast (Δn) waveguides by femtosecond-laser-assisted ion migration. The positive Δn of the waveguides is caused by the local enrichment of La2O3 in the guiding region with a slope of 8·10−3(mol.%)−1. The value of this is consistent with numerical aperture measurements of the waveguides and local compositional measurements at the guiding region performed by energy-dispersive x-ray micro-analysis. The maximum achievable Δn values can be controlled through the initial La2O3 content of the glass. Maximum Δn values >10−2 for samples with just 5.5 mol. % of La2O3 have been produced. This compositional design approach could be potentially used to produce highly efficient femtosecond laser writeable glasses in other glass families. |
| Databáze: | OpenAIRE |
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