Efficient second harmonic generation by birefringent phase matching in femtosecond-laser-inscribed KTP cladding waveguides
We report on the fabrication of nonlinear KTiOPO4 (KTP) cladding waveguides by using femtosecond-laser direct inscription. The produced guiding structures with a circular cross section of ∼100 μm diameter support good light confinement both for the visible and infrared, for TE and TM polarization. U...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/146870 |
| Acceso en línea: | http://hdl.handle.net/10366/146870 |
| Access Level: | acceso abierto |
| Palabra clave: | optical cladding waveguides Second Harmonic Generation femtosecond laser inscription KTP crystals |
| Sumario: | We report on the fabrication of nonlinear KTiOPO4 (KTP) cladding waveguides by using femtosecond-laser direct inscription. The produced guiding structures with a circular cross section of ∼100 μm diameter support good light confinement both for the visible and infrared, for TE and TM polarization. Under the 1064 nm pulsed fundamental pump beam, guided-wave second harmonic generation (SHG) at 532 nm has been realized with an optical conversion efficiency as high as 45.6% (∼0.076% W–1 cm–2), which is three times the magnitude of the normalized efficiency obtained for “double-line” KTP waveguides (fabricated with the aim of comparison), thus showing an intriguing potential as integrated frequency converters |
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