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High power Q-switched thulium doped fibre laser using carbon nanotube polymer composite saturable absorber
2016, Chernysheva, Maria, Mou, Chengbo, Arif, Raz, AlAraimi, Mohammed, Rümmeli, Mark, Turitsyn, Sergei, Rozhin, Aleksey
We have proposed and demonstrated a Q-switched Thulium doped fibre laser (TDFL) with a ‘Yin-Yang’ all-fibre cavity scheme based on a combination of nonlinear optical loop mirror (NOLM) and nonlinear amplified loop mirror (NALM). Unidirectional lasing operation has been achieved without any intracavity isolator. By using a carbon nanotube polymer composite based saturable absorber (SA), we demonstrated the laser output power of ~197 mW and pulse energy of 1.7 μJ. To the best of our knowledge, this is the highest output power from a nanotube polymer composite SA based Q-switched Thulium doped fibre laser.