We analyze the influence of heat generation caused by nonradiative transitions in a high-power 1.55 µm double-clad erbium-ytterbium fiber laser on the Stark level population. At strong pumping rates, 1 µm 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 µm laser's efficiency by increasing the 1 µm lasing threshold.
© 2005 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(140.3500) Lasers and laser optics : Lasers, erbium
(140.6810) Lasers and laser optics : Thermal effects
Lasers and Laser Optics
Guillaume Canat, Jean-Claude Mollier, Yves Jaouën, and Bernard Dussardier, "Evidence of thermal effects in a high-power Er3+-Yb3+ fiber laser," Opt. Lett. 30, 3030-3032 (2005)