Abstract
-doped acid-resistant aluminum germanate (NMAG) glasses and a ion-exchanged channel waveguide have been fabricated and characterized. Judd–Ofelt intensity parameters indicate a high asymmetry and strong covalent environment in NMAG glasses. A remarkable internal gain coefficient of at wavelength was achieved in the long channel waveguide. Based on absorption and emission cross-sections, the ideal internal gain coefficient at and is given to be and , respectively, as the population inversion equals 1.0. Experimental results and theoretical anticipation indicate that -doped NMAG glasses are potential and attractive substrates in developing S- and U-band waveguide amplifiers and an eye-safe medical laser.
© 2010 Optical Society of America
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