All-normal dispersion Yb-doped fiber laser mode-locked by Sb_2Te_3 topological insulator

摘要

In this paper we demonstrate a preliminary work done on employing antimony telluride (Sb_2Te_3) topological insulator as a saturable absorber for Yb-doped fiber lasers. The material was deposited onto a side-polished fiber by means of a pulsed magnetron sputtering technique. Fabricated absorber was implemented in an all-normal dispersion cavity and allowed for self-starting dissipative soliton generation. The laser emitted stable pulse train at a repetition rate of 17.07 MHz with 4.25 nm broad output spectrum centered around 1039.4 nm. Average output power amounted to 0.54 mW with 32 pj pulse energy.