Abstract

Very intense green and red emission was observed at room temperature from the S43/2 and F49/2 levels of Er3+:Y2O3. A cw diode laser at 975 nm was used as a pump for resonant sequential excitation of the I411/2 and F47/2 levels. The fluorescence was easily visible to the naked eye, even with 27 mW of excitation power. It was found that at 850 mW of cw excitation power the total luminance was 39,000 cd/m2. This corresponds to 100 µW of green emission and 270 µW of red emission.

© 2000 Optical Society of America

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