| Autor: |
Anna Pyajt, Yu. N. Efimov, O. V. Andreeva, V. N. Sizov, Victor G. Bespalov, A. S. Cherkasov |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.518077 |
| Popis: |
We report the theoretical and experimental results of dynamic holograms recording in nano-size porous glasses containing fullerine C 60 and its use for optical limiting. To record a grating with spatial frequency 20 mm -1 we used laser pulses with 18 ns duration and 532 nm wavelength. Initial transmittance of the samples varied from 30% to 70%. We found that high diffraction orders appeared out of the medium during the experiment and investigated dependence self-diffraction on initial transmittance of the samples and in case when the samples were filled by toluene. It was found that the most effective self-diffraction is in situation when we use toluene and initial transmittance of the sample is nearly 70%. For explanation of our experimental results we made a numerical model of dynamic hologram in fullerene-containing media taking into consideration amplitude and phase grating forming during the pulse length. Our model showed good agreement with experimental results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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