Evidence of thermal effects in a high-power Er3+-Yb3+ fiber laser.
We analyze the influence of heat generation caused by nonradiative transitions in a high-power 1.55 microm double-clad erbium-ytterbium fiber laser on the Stark level population. At strong pumping rates, 1 microm 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 1.5 microm laser's efficiency by increasing the 1 microm lasing threshold.
Canat
Guillaume
G
Département d'Optique Théorique et Appliquée, Office National d'Etudes et de Recherches Aérospatiales, Chemin de la Hunière,Palaiseau, France. guillaume.canat@onecert.fr
Mollier
Jean-Claude
JC
Jaouën
Yves
Y
Dussardier
Bernard
B