Detection and characterization of absorption heterogeneities in KH2PO4 crystals
| Autor: | Matthieu Pommiès, David Damiani, Jérémie Capoulade, Jean-Yves Natoli, Hervé Piombini, Bertrand Bertussi, Hervé Mathis |
|---|---|
| Přispěvatelé: | CEA Le Ripault (CEA Le Ripault), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut FRESNEL (FRESNEL), Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École Centrale de Marseille (ECM)-Aix Marseille Université (AMU), Gallais, Laurent |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics]
Materials science 02 engineering and technology 01 natural sciences 010309 optics Crystal Optics Spectrophotometry 0103 physical sciences Radiation damage medicine Electrical and Electronic Engineering Physical and Theoretical Chemistry Absorption (electromagnetic radiation) High concentration [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] medicine.diagnostic_test business.industry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Optical focusing Electronic Optical and Magnetic Materials Characterization (materials science) 0210 nano-technology business Beam (structure) |
| Zdroj: | Optics Communications Optics Communications, 2006, 267, pp.154 Optics Communications, Elsevier, 2006, 267, pp.154 |
| ISSN: | 0030-4018 |
| Popis: | The SOCRATE facility is used for the detection of heterogeneous absorption in large and rapidly grown KH2PO4 (KDP) crystals. The different regions are subsequently characterized by spectrophotometry and laser-damage measurement. In accordance with previous results from the literature we found that, by using the SOCRATE damage measurement set-up with a large beam (300 ∗ 600 μm2), the absorption level does not play a major role in the damage mechanism at 355 nm. However, by testing the damage resistance of the same KDP component with a focused beam (9 μm diameter) at 355 nm, we highlight for the first time significantly different damage resistances between highly and weakly absorbing regions from a KDP crystal. Indeed, with a focused beam, we demonstrate that the laser-damage threshold may be lower in some sectors cut in the pyramidal part than in sectors from the prismatic part. This means that the absorbing defects at high concentration are not the predominant damage precursors at 355 nm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect