Dissipative soliton generation in Er-doped fiber laser mode-locked by Sb_2Te_3 topological insulator

We report on the generation of dissipative solitons in an Er-doped fiber laser mode-locked by antimony telluride (${\mathrm{Sb}}_2{\mathrm{Te}}_3$) topological insulator in the near-zero dispersion regime. Layers of ${\mathrm{Sb}}_2{\mathrm{Te}}_3$ were deposited on a side-polished (D-shaped) fiber using a pulsed magnetron sputtering technique. Sub-170-fs pulses with 34-nm full width at half-maximum (FWHM) and 0.21 nJ of pulse energy were obtained from an all-fiber, ring-shaped laser cavity after the compression in a single-mode fiber.