Evidence of thermal effects in high power Er3+-Yb3+ fiber laser
Résumé
We analyse the influence of heat generation by non radiative transitions in high power 1.55µm double cladding Erbium-Ytterbium fiber laser. At strong pumping rates, 1µm lasing can start due to parasitic reflections. We present a model including heat generation and its effect on the Stark level population using the MacCumber relation. Heat generation plays then a significant role and improves the 1.5µm laser efficiency by increasing the 1µm threshold.
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