Microjoule-level widely tunable gain-switched thuliumdoped fiber laser

We demonstrate the hybrid-pumped (continuous-wave+pulsed) gain-switched smallcore thulium-doped fiber laser tunable in 1825-2064nm spectral range that delivers 50-300ns pulses with energies up to 12μJ (65μJ of injected pump) reaching performance of larger-core gainswitched laser systems. OCIS codes: (140.3538) Lasers, pulsed; (060.2320) Fiber optics amplifiers and oscillators