Low-loss pedestal Ta2O5 nonlinear optical waveguides
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2019
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Optics Express
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In this work, we investigate a pedestal tantalum oxide (Ta2O5) material platform for
integrated nonlinear optics (NLO). In order to achieve low propagation losses with this material,
pedestal waveguides with Ta2O5 cores were designed. The nonlinear refractive index n2 of this
new platform was obtained by measuring the amount of spectral broadening due to self-phase
modulation (SPM) of 23 fs optical pulses at 785 nm propagating through the waveguides. In this
manner, a nonlinear index of (5.8 2.0) 1019 m2W1 was found for this material, which is in
good agreement with values reported in related works where strip waveguides were used for a
similar purpose. Furthermore, due to the pedestal configuration, propagation losses as low as 1.6
dB cm1 for narrow waveguides and 0.1 dB cm1 for large waveguides were obtained. Finite
element method (FEM) mode analysis was performed to calculate the mode characteristics, as
well as the effective areas of the waveguides. The high nonlinear and linear refractive indices,
wide bandgap and low propagation losses make this platform ideal for applications extending
from the visible into the mid-IR regions of the optical spectrum. Due the large gap, Ta2O5 should
have low two photon absorption at the near-IR as well.
Como referenciar
SIERRA, JULIAN H.; RANGEL, RICARDO C.; SAMAD, RICARDO E.; VIEIRA JUNIOR, NILSON D.; ALAYO, MARCO I.; CARVALHO, DANIEL O. Low-loss pedestal Ta2O5 nonlinear optical waveguides. Optics Express, v. 27, n. 26, p. 37516-37521, 2019. DOI: 10.1364/OE.27.037516. Disponível em: http://repositorio.ipen.br/handle/123456789/30839. Acesso em: 14 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.