Passively mode-locking emission in all-PM thulium-doped fiber lasers at 1.95 um and 2.07 um

CUADRADO LABORDE, CHRISTIAN; SANCHEZ, LUIS A.; CARRASCOSA, ANTONIO; ANTONIO DIEZ; CRUZ, JOSE LUIS; ANDRES BOU, MIGUEL

Workshop; International Laser Physics Workshop (LPHYS'22); 2022

Light sources in the 2 um range are useful for a variety of applications including eye-safe LIDAR, medicine, spectroscopy, remote sensing, etc. Although thulium-doped fibers (TDF) are generally preferred below 2 um, their use at wavelengths > 2 um is marginal in favor of holmium-doped fibers. In this work, we have demonstrated passively modelocked polarization-maintaining (PM) emission in two TDF lasers, with emission at 1.95 um in one case and 2.07 um in the other.