Abstract
-codoped phosphate glass with compositions of () in mol. % were investigated. Judd–Ofelt (JO) intensity parameters have been calculated to predict radiative properties based on absorption spectra. The stimulated emission cross section () calculated according to McCumber theory was , almost twice larger than values reported before. The effective line width (), full width at half-maximum (FWHM) and the quality parameters for designing optical amplifier devices were listed in the table compared with other types of phosphate glass matrices. A theoretical model of a -codoped system based on rate and power propagation equations was put forward to investigate the potential advantages of the materials applied for short-length, high-gain fiber amplifiers. A simulated gain of 32.2 and per unit length was achieved in 12.5-cm-long fiber.
© 2015 Optical Society of America
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