Characterization of the third-order optical nonlinearity spectrum of barium borate glasses

Author(s)

Santos, S. N. C. ^[1] ; Almeida, J. M. P. ^[1] ; Paula, K. T. ^[1] ; Tomazio, N. B. ^[1] ; Mastelaro, V. R. ^[1] ; Mendonca, C. R. ^[1]

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Optical Materials; v. 73, p. 16-19, NOV 2017.
• Web of Science Citations: 7

Abstract

Borate glasses have proven to be an important material for applications ranging from radiation dosimetry to nonlinear optics. In particular, B2O3-BaO based glasses are attractive to frequency generation since their barium metaborate phase (beta-BaB2O4 or beta-BBO) may be crystallized under proper heat treatment. Despite the vast literature covering their linear and second-order optical nonlinear properties, their third-order nonlinearities remain overlooked. This paper thus reports a study on the nonlinear refraction (n(2)) of BBO and BBS-DyEu glasses through femtosecond Z-scan technique. The results were modeled using the BGO approach, which showed that oxygen ions are playing a role in the nonlinear optical properties of the glasses studied here. In addition, the barium borate glasses containing rare-earths ions were found to exhibit larger nonlinearities, which is in agreement with previous studies. (C) 2017 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 Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/17058-7 - Implementation and application of LIFT with femtosecond laser in glasses of high optical nonlinearities
• Grantee: Juliana Mara Pinto de Almeida
• Support Opportunities: Scholarships in Brazil - Post-Doctoral