Abstract
Systematic studies of cooperative upconversion and energy transfer in newly developed phosphate glasses were performed by a rate-equation formalism. The cooperative-upconversion coefficients of the level for different concentrations were determined from the luminescence-decay curves for high pump intensities. A small cooperative-upconversion coefficient of was obtained for a high concentration of energy-transfer coefficients for an concentration of codoped with different concentrations were calculated from the lifetime measurements of the level of For codoped with an concentration of an energy-transfer coefficient of and an energy-transfer efficiency higher than 95% were determined from our measurements under weak excitation. The cooperative-upconversion coefficients of -doped samples were found to be consistent with that of an -doped sample with the same concentration. The weak cooperative-upconversion effect of high concentrations and efficient energy transfer indicate that these newly developed - and -doped phosphate glasses are excellent for active device applications.
© 2000 Optical Society of America
Full Article | PDF ArticleMore Like This
T. Ohtsuki, S. Honkanen, S. I. Najafi, and N. Peyghambarian
J. Opt. Soc. Am. B 14(7) 1838-1845 (1997)
Mathieu Laroche, Sylvain Girard, Jayanta K. Sahu, W. Andrew Clarkson, and Johan Nilsson
J. Opt. Soc. Am. B 23(2) 195-202 (2006)
Yonghao Liu, Yujin Chen, Yanfu Lin, Qiguang Tan, Zundu Luo, and Yidong Huang
J. Opt. Soc. Am. B 24(5) 1046-1052 (2007)