Microjoule-level widely tunable gain-switched thuliumdoped fiber laser

We demonstrate the hybrid-pumped (continuous-wave+pulsed) gain-switched small-core 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 gain-switched laser systems.