Next Article in Journal
Numerical Study on the Variability of Plastic CTOD
Next Article in Special Issue
Improving the Forming Quality of Laser Dynamic Flexible Micropunching by Laser Pre-Shocking
Previous Article in Journal
Cyclodextrins Modified/Coated Metal–Organic Frameworks
Previous Article in Special Issue
Effect of Laser Beam Oscillation on Laser Welding–Brazing of Ti/Al Dissimilar Metals
 
 
Article

Role of the La/K Compositional Ratio in the Properties of Waveguides Written by Fs-Laser Induced Element Redistribution in Phosphate-Based Glasses

1
Electronic Engineering Department, Higher Technological Institute of Acatlan Osorio, Carretera Acatlan—San Juan Ixcaquistla k.m. 5.5, Acatlan de Osorio 74949, Mexico
2
Institute of Ceramics and Glass (ICV, CSIC), Kelsen 5, 28049 Madrid, Spain
3
Department of Materials Physics, Faculty of Physics, Complutense University of Madrid, 28040 Madrid, Spain
4
Laser Processing Group, Institute of Optics (IO, CSIC), Serrano 121, 28006 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(6), 1275; https://doi.org/10.3390/ma13061275
Received: 21 January 2020 / Revised: 25 February 2020 / Accepted: 3 March 2020 / Published: 11 March 2020
(This article belongs to the Special Issue Advances in Laser Technologies and Applications)
The local modification of the composition of glasses by high repetition femtosecond laser irradiation is an attractive method for producing photonic devices. Recently, the successful production of waveguides with a refractive index contrast (Δn) above 10−2 by fs-laser writing has been demonstrated in phosphate glasses containing La2O3 and K2O modifiers. This large index contrast has been related to a local enrichment in lanthanum in the light guiding region accompanied by a depletion in potassium. In this work, we have studied the influence of the initial glass composition on the performance of waveguides that are produced by fs-laser induced element redistribution (FLIER) in phosphate-based samples with different La and K concentrations. We have analyzed the contribution to the electronic polarizability of the different glass constituents based on refractive index measurements of the untreated samples, and used it to estimate the expected index contrast caused by the experimentally measured local compositional changes in laser written guiding structures. These estimated values have been compared to experimental ones that are derived from near field images of the guided modes with an excellent agreement. Therefore, we have developed a method to estimate before-hand the expected index contrast in fs-laser written waveguides via FLIER for a given glass composition. The obtained results stress the importance of considering the contribution to the polarizability of all the moving species when computing the expected refractive index changes that are caused by FLIER processes. View Full-Text
Keywords: fs-laser writing; photonic devices; glass; ion migration; element redistribution; waveguides; refractive index contrast fs-laser writing; photonic devices; glass; ion migration; element redistribution; waveguides; refractive index contrast
Show Figures

Graphical abstract

MDPI and ACS Style

Moreno-Zarate, P.; Muñoz, F.; Sotillo, B.; Macias-Montero, M.; Atienzar, J.; Garcia-Pardo, M.; Fernandez, P.; Serna, R.; Solis, J. Role of the La/K Compositional Ratio in the Properties of Waveguides Written by Fs-Laser Induced Element Redistribution in Phosphate-Based Glasses. Materials 2020, 13, 1275. https://doi.org/10.3390/ma13061275

AMA Style

Moreno-Zarate P, Muñoz F, Sotillo B, Macias-Montero M, Atienzar J, Garcia-Pardo M, Fernandez P, Serna R, Solis J. Role of the La/K Compositional Ratio in the Properties of Waveguides Written by Fs-Laser Induced Element Redistribution in Phosphate-Based Glasses. Materials. 2020; 13(6):1275. https://doi.org/10.3390/ma13061275

Chicago/Turabian Style

Moreno-Zarate, Pedro, Francisco Muñoz, Belen Sotillo, Manuel Macias-Montero, Julia Atienzar, Marina Garcia-Pardo, Paloma Fernandez, Rosalia Serna, and Javier Solis. 2020. "Role of the La/K Compositional Ratio in the Properties of Waveguides Written by Fs-Laser Induced Element Redistribution in Phosphate-Based Glasses" Materials 13, no. 6: 1275. https://doi.org/10.3390/ma13061275

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop