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Study of luminescence concentration quenching and energy transfer upconversion in Nd-doped LaSc3(BO3)4 and GdVO4 laser crystals

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Abstract

Luminescence concentration quenching and upconversion have been quantitatively investigated in neodymium-doped LaSc3(BO3)4 (LSB) and GdVO4 (GVO) laser crystals. The microparameter of cross relaxation (self-quenching) was determined in Nd:GVO as 3.6×10-40 cm6/s. It is shown that, in Nd:LSB, upconversion is static, with the upconversion microparameter Cda=(0.51.1)×10-37 cm6/s. In Nd:GVO, upconversion is migration accelerated, with the upconversion macroparameter α1.2×10-15 cm3/s. The influence of upconversion on laser operation is discussed.

© 1998 Optical Society of America

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