Abstract

A novel tool for investigation of nonradiative processes in active solid-state laser media is proposed. The technique is based on using an interferometer for population-kinetics detection by means of resonantly enhanced nonlinearity. The advantages of this method in comparison with traditional luminescence-kinetics techniques are verified on the example of decay time measurements for nonradiative ${}^4{I}_{11/2}\to {}^4{I}_{13/2}$ transition in an ${\mathrm{Er}}^{3+}$-doped active optical fiber.

© 2015 Optical Society of America

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