Self-pulsing-free continuous-wave operation of an all-fiberized Yb fiber laser

Abstract

Self-pulsing-free continuous-wave operation of an Yb fiber laser based on an all-fiberized configuration incorporating an additional fiber Fabry-Perot cavity is reported. The fiber Fabry-Perot cavity as a feedback source for lasing allows the fiber laser to operate in stable longitudinal modes resulting in suppression of the self-pulsing behavior. The Yb fiber laser yielded 5.9 W of the stable cw output at 1064 nm for 8.9 W of absorbed pump power corresponding to a slope efficiency of similar to 74%. The mechanism for suppression of the self-pulsing and the prospect of further power scaling are discussed. (C) 2015 The Japan Society of Applied Physics