Modeling results for Er{sup}3+-doped waveguide amplifiers fabricated by various ion-exchange processes are presented. The gain performance of these devices for 0.98- and 1.48-μm pump wavelengths are compared. Measured spectroscopic properties ofa phosphate glass with Er{sup}3+ concentration of 3.7×10{sup}20 cm{sup}-3 are used throughout the modeling, and waveguide propagation loss of 0.1 to 0.6 dB/cm is used. It is shown that gain coefficients exceeding 5 dB/cm are feasible utilizing optimizedion-exchanged waveguides in this glass. The modeling is performed for glasses doped with erbium only, excluding possible ytterbium codoping.
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