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Giant Optical Gain in a Rare-earth-ion-doped Waveguide

D. Geskus, S. Aravazhi, S. M. García-Blanco, and M. Pollnau

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Abstract

By exploiting large transition cross-sections, high dopant concentration, and strong light confinement, a gain of 950 dB/cm is demonstrated in a large-refractive-index-contrast KGdxLu1-x(WO4)2:Yb3+ channel waveguide, representing a two-orders-of-magnitude improvement over previous results in rare-earth-ion-doped materials.

© 2011 Optical Society of America

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