Q-switching of a thulium-doped fibre laser using a holmium-doped fibre saturable absorber

摘要

We have proposed and demonstrated a new passively Q-switched thulium-doped fibre laser configuration. A distinctive feature of this configuration is the use of a heavily holmium-doped fibre for Q-switching. Lasing was obtained at 1.96 mm, with a pulse energy of 3 mJ and pulse duration of 600 ns. The highest pulse repetition rate was 80 kHz.