Ridge Waveguides and Y-Branch Beam Splitters in KTiOAsO4 Crystal by 15 MeV Oxygen Ion Implantation and Femtosecond Laser Ablation
We report on the fabrication of ridge waveguides and Y-branch beam splitters in KTiOAsO 4 nonlinear optical crystal by the combination of 15 MeV oxygen (O 5+ ) ion implantation and femtosecond laser ablation. Guiding properties were investigated at the wavelengths of 633 and 808 nm, respectively, sh...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2017 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/147087 |
| Acceso en línea: | http://hdl.handle.net/10366/147087 |
| Access Level: | acceso abierto |
| Palabra clave: | Optical waveguides Waveguide lasers Laser beams Ultrafast optics Crystals Ions Optical device fabrication |
| Sumario: | We report on the fabrication of ridge waveguides and Y-branch beam splitters in KTiOAsO 4 nonlinear optical crystal by the combination of 15 MeV oxygen (O 5+ ) ion implantation and femtosecond laser ablation. Guiding properties were investigated at the wavelengths of 633 and 808 nm, respectively, showing high polarization sensitivity of light propagation. Splitting ratios of these beam splitters are dependent on in-coupling alignment. The simulated guiding modal distributions of splitted guided beams, which was based on a reconstructed refractive index profile, shows reasonable consistence with the measured ones. After the stepwise annealing treatment at 473 and 573 K for 1 h each, the propagation losses for these guiding structures have been reduced considerably. |
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