A new Er{sup}3+-doped phosphate glass exhibiting an excellent durability in both boiling water and NaNO{sub}3 molten salt is developed. The ion-exchange process of this glass is investigated by treating glass samples in a variety of salt bathswith various exposure times. A planar waveguide with one mode at 1.54μm and three modes at 632.8 nm is demonstrated. The spectral properties of Er{sup}3+ in this glass are characterized by measuring absorption and emission spectra and fluorescencelifetimes. The emission cross section of Er{sup}3+ in this glass is calculated to be 0.76×10{sup}20 cm{sup}2 using McCumber theory.
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