Continuous-wave operation of an erbium-doped short-cavity composite fiber laser

Abstract In the paper we investigate the characteristics of a short-cavity fiber laser based on a new silica fiber with a composite phosphosilicate Erbium-doped core without additional co-doping with ytterbium ions. For the first time, the operation of such laser in the continuous-wave lasing mode with 1490 nm pumping was shown. The laser operation in the self-Q-switching mode, changing to the continuous-wave mode with increasing the pumping power, is demonstrated.