All-Fiber Thulium-Doped Mode-Locked Lasers Based on the Nonlinear Amplifying Loop Mirror

Krylov, A.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Dianov, E.M.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Pozharov, A.S.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Obraztsova, E.D.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Kryukov, P.G.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia, Arutyunyan, N.R.; A.M. Prokhorov General Physics Institute Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia & Chernysheva, M.A.; Fiber Optics Research Center Of The Russian Academy Of Sciences, 38 Vavilov Str., Moscow, 119333, Russia
We  report  on  thulium-doped  all-fiber  lasers  based on the nonlinear amplifying loop mirror and mode-locked by both a semiconductor saturable absorber (SESAM) and  single-walled  carbon  nanotubes (SWCNT).  An  intracavity  and  external dispersion management was realized with the aid of a passive germanium-silicate fiber.  SESAM  mode-locked laser  generates  as  short  as  230-fs  pulses with maximum  average  output  power  of  106 mW, corresponding to a 3.7 kW peak power and almost 2 nJ  pulse  energy.  In  contrast  to  SESAM-based laser,  the SWCNT  mode-locked  laser  generates 450-fs  pulses  of...