Second harmonic generation of femtosecond laser written depressed cladding waveguides in periodically poled MgO:LiTaO3 crystal
| Autor: | Feng Chen, Lei Wang, Javier R. Vázquez de Aldana, Lingqi Li, Xintong Zhang, Qingming Lu, Carolina Romero |
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| Rok vydání: | 2019 |
| Předmět: |
Solid state lasers
Materials science Waveguide lasers Physics::Optics Phase matching 02 engineering and technology 01 natural sciences law.invention 010309 optics Optics law 0103 physical sciences Light intensity business.industry Poling Energy conversion efficiency Second-harmonic generation 021001 nanoscience & nanotechnology Cladding (fiber optics) Laser Atomic and Molecular Physics and Optics Array waveguide devices Femtosecond laser writing Femtosecond 0210 nano-technology business Waveguide |
| Zdroj: | GREDOS. Repositorio Institucional de la Universidad de Salamanca instname GREDOS: Repositorio Institucional de la Universidad de Salamanca Universidad de Salamanca (USAL) |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.27.002101 |
| Popis: | We report on the fabrication of depressed cladding waveguides in periodically poled MgO doped LiTaO3 by using low-repetition-rate femtosecond laser writing, and their use for guided-wave second harmonic generation (SHG). The cladding waveguides exhibit different guiding performance along the extraordinary and ordinary polarizations. The temperature-dependent quasi-phase-matching (QPM) is realized to obtain SHG in the depressed cladding waveguides. The results show that the QPM temperature was dependent on the poling period and on the features of the cladding waveguides. The highest nonlinear conversion efficiency (0.74%W−1cm−2) was found in the waveguide fabricated with large scanning velocity (0.75 mm/s) and small radius (15 μm). National Natural Science Foundation of China (NSFC) (61775120, 11874239); Junta de Castilla y León (Project SA046U16); Spanish Ministerio de Economía y Competitividad (MINECO, FIS2013-44174-P, FIS2015-71933-REDT). |
| Databáze: | OpenAIRE |
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