Study Of Auger Upconversion Process In Cr3+ And Nd3+ Doped Solids
Fluorides crystals; Thermal Lens; Upconversion
In this work we applied the Thermal Lens (LT) technique to determine the upconversion parameter (γ) for Cr3+: LiSrAlF6, Cr3+: LiSrGaF6, Cr3+: SrAlF5 and Nd3+: ZBLAN. The measures for the Cr3+ doped fluorides were accomplished at 15 °C, to eliminate the suppression effect due to temperature and upon excitation in the cw regime. We used Ar+ laser (488 and 514 nm) and dye (601 nm) laser radiation for the Cr3+ doped crystals and 514 nm and 796.7 nm (Ti-sapphire) for the Nd3+ doped glasses. We observed a nonlinear increase of the TL signal with excitation power, characterizing a fluorescence quantum efficiency (η) decrease that was attributed to the Auger effect. A theoretical model was developed to obtain γ from the TL data. © 2001 SPIE · 0277-786X/01/$15.00.
Proceedings of SPIE-The International Society for Optical Engineering
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Pilla, V.; Andrade, A. A.; and Catunda, T., "Study Of Auger Upconversion Process In Cr3+ And Nd3+ Doped Solids" (2001). Scopus Export 2000s. 434.