Abstract
We report what we believe to be the first demonstration of a room-temperature, continuous-wave double-clad crystal fiber laser grown by the codrawing laser heated pedestal growth method. The threshold is below , which is a factor of 4 lower than previously reported -doped lasers. A slope efficiency of 6.9% was obtained, and is in good agreement with the numerical simulation. In additional to small core diameter, the low-threshold lasing is made possible by the low propagation loss of and the high crystallinity of the core.
© 2008 Optical Society of America
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