HEAT TREATMENT AND OPTICAL SPECTROSCOPY OF CR4+:GGG FOR PASSIVELY Q-SWITCHING ND:GARNET LASERS
| Autor: | S. Mohamed, S. Jamal, M. Zafer, A. Sh. M. Yassin |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Iranian Journal of Materials Science and Engineering, Vol 11, Iss 2, Pp 79-86 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1735-0808 2383-3882 |
| Popis: | High quality GGG:Cr,Ca crystal for passive Q-switching Nd:garnet lasers has been grown by the Czochralski method. Thermal treatment of GGG crystals co-doped with Cr4+ and Ca2+ at different temperatures is investigated. The absorption spectra were resolved into different peaks, of modified Gaussian line-shape. Transition from octahedral sites to tetrahedral ones is thermally activated. An optimal temperature interval for this transition was found to be 1200-1300 ˚C. The investigated samples were used as saturable absorbers in flash-lamp pumped Nd:YAG laser, and a pulse width of about 16 nsec was obtained |
| Databáze: | Directory of Open Access Journals |
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