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Título
All-laser-micromachining of ridge waveguides in LiNbO3 crystal for mid-infrared band applications.
Autor(es)
Materia
Laser material processing
Nonlinear optics
Fecha de publicación
2017-08
Editor
Nature Research [Commercial Publisher]
Citación
Li, L., Nie, W., Li, Z. et al. All-laser-micromachining of ridge waveguides in LiNbO3 crystal for mid-infrared band applications. Sci Rep 7, 7034 (2017). https://doi.org/10.1038/s41598-017-07587-w
Resumen
[EN]The femtosecond laser micromachining of transparent optical materials offers a powerful and feasible solution to fabricate versatile photonic components towards diverse applications. In this work, we report on a new design and fabrication of ridge waveguides in LiNbO3 crystal operating at the mid-infrared (MIR) band by all-femtosecond-laser microfabrication. The ridges consist of laser-ablated sidewalls and laser-written bottom low-index cladding tracks, which are constructed for horizontal and longitudinal light confinement, respectively. The ridge waveguides are found to support good guidance at wavelength of 4 μm. By applying this configuration, Y-branch waveguiding structures (1 × 2 beam splitters) have been produced, which reach splitting ratios of ∼1:1 at 4 μm. This work paves a simple and feasible way to construct novel ridge waveguide devices in dielectrics through all-femtosecond-laser micro-processing.
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