Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser

An erbium-doped fiber laser with a high Er-ion concentration generally causes output power fluctuation and self-pulsing resulting from relaxation oscillation. In this work, we employed a new EDF with high Er- and Al-ion concentrations in order to suppress the relaxation oscillation and increase the output power of the laser. As a result, the output power was more than doubled and the power fluctuation halved. The linewidth was narrowed to 4 kHz. Furthermore the frequency stability of the (C2H2)-C-13 frequency-stabilized erbium fiber laser reached as high as 1.3 x 10(-11) for tau = 1 s and 2.0 x 10(-11) for tau = 10(2) s. The short-term stability of tau = 1 s was also improved.