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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Waveguides and nonlinear index of refraction of borate glass doped with transition metals

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Author(s):
Almeida, Juliana M. P. [1] ; Fonseca, Ruben D. [1] ; De Boni, Leonardo [1] ; Diniz, Andre Rosa S. [1] ; Hernandes, Antonio C. [1] ; Ferreira, Paulo H. D. [1] ; Mendonca, Cleber R. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Optical Materials; v. 42, p. 522-525, APR 2015.
Web of Science Citations: 8
Abstract

The ability to write 3D waveguides by femtosecond laser micromachining and the nonlinear refractive index (n(2)) spectrum of a new borate glass matrix, containing zinc and lead oxides - (BZP) have been investigated. The transparent matrix was doped with transition metals (CdCl2, Fe2O3, MnO2 and CoO) in order to introduce electronic transitions in visible spectrum, aiming to evaluate their influence on the waveguides and n2 spectrum. We observed that n2 is approximately constant from 600 to 1500 nm, exhibiting an average value of 4.5 x 10(-20) m(2)/W, which is about twice larger than the one for fused silica. The waveguide profile is influenced by the self-focusing effect of the matrix owing to its positive nonlinear index of refraction in the wavelength used for micromachining. A decrease in the waveguide loss of approximately four times was observed for the sample doped with Fe in comparison to the other ones, which may be associated with the change in the optical gap energy. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/12399-0 - Femtosecond pulses applied to nonlinear optics: spectroscopy, pulse shaping and microfabrication
Grantee:Cleber Renato Mendonça
Support type: Research Projects - Thematic Grants
FAPESP's process: 12/04794-9 - Micromachining in glass using femtosecond lasers: waveguide fabrication and nanoparticles production.
Grantee:Paulo Henrique Dias Ferreira
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/21434-3 - Nanoparticles in oxide and chalcogenide glasses: optical nonlinearities and waveguide fabrication by femtosecond laser pulses
Grantee:Juliana Mara Pinto de Almeida
Support type: Scholarships in Brazil - Doctorate