Dynamics and stabilization of a high power side-pumped Yb-doped double-clad fiber laser

We present an experimental study of the dynamics of a high power Yb3+-doped double-clad fiber laser in various optical configurations operating in the 1.08 mum wavelength. The fiber is side-pumped with a high power laser diod e using the V-groove technique. Different self-pulsing regimes are identifi ed resulting from third-order nonlinear effects. The influence of the cavit y losses on the dynamical behavior is also investigated. In addition, we sh ow that the system is efficiently stabilized in a unidirectional ring cavit y where Brillouin backscattering is suppressed. (C) 2000 Published by Elsev ier Science B.V.