Understanding light intensity thresholds for catastrophic optical damage in LiNbO3
| Autor: | J. Villarroel, J. Carnicero, Mercedes Carrascosa, Angel García-Cabañes, José Manuel Cabrera |
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| Rok vydání: | 2008 |
| Předmět: |
inorganic chemicals
Catastrophic optical damage Optics and Photonics Materials science Light business.industry Energy transfer Niobium Oxides Photorefractive effect Equipment Design Radiation Dosage Atomic and Molecular Physics and Optics Equipment Failure Analysis Light intensity Refractometry Optics Models Chemical Computer Simulation Equipment Failure Phase conjugation business Refractive index |
| Zdroj: | Optics express. 16(1) |
| ISSN: | 1094-4087 |
| Popis: | The appearance of light intensity thresholds for catastrophic optical damage in LiNbO3 is satisfactorily explained by using a photorefractive model based on the Fe(2+)?Fe(3+) and NbLi(4+)?NbLi(5+) defect pairs. Model simulations of the photorefractive amplification gain as a function of the light intensity present sharp threshold behavior. A similar behavior is shown by the saturating refractive index change. In agreement with experiments, predicted thresholds appear shifted towards higher intensities (up to a 10(4) factor) when the Nb(Li) concentration is decreased or the temperature is increased. The model also explains very recent data on the threshold enhancement with the Fe(2+)/Fe(3+) ratio in optical waveguides. |
| Databáze: | OpenAIRE |
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