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Novel Chemically Stable Er3+-Yb3+ Codopded Phosphate Glass for Ion-Exchanged Active Waveguide Devices

A novel Er3+-Yb3+ codoped phosphate glass, which combines good chemical durability with good spectroscopic properties, is developed for the ion-exchange process. The relevant properties of this glass are presented for reference in the design and modelling of ion-exchanged active waveguide devices. The weight-loss rate of this glass is 1.45×10−5 g⋅cm−2⋅h−1 in boiling water, which is comparable to that of Kigre's Q-246 silicate glass. The emission cross section of Er3+ in this glass is calculated to be 0.72×10−20 cm2 using the McCumber theory. It is found that a planar waveguide with three modes at 632.8 nm is readily realized in this glass from our primary ion-exchange experiments.