Abstract
We analyze the influence of heat generation caused by nonradiative transitions in a high-power double-clad erbium–ytterbium fiber laser on the Stark level population. At strong pumping rates, lasing can start as a result of parasitic reflections. We present a model that allows us to simulate the effect of self-generated heat on the Stark level population by using the MacCumber relation. Heat generation plays a significant role and improves the laser’s efficiency by increasing the lasing threshold.
© 2005 Optical Society of America
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