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This paper reports a scheme for the generation and amplification of pico- and femtosecond pulses in the range 1.93–1.97 μm using thulium-doped silica fibres. Group velocity dispersion (GVD) management in the cavity of the thulium-doped fibre laser oscillator is ensured by a single-mode germanosilicate fibre (75 mol % GeO2 in the core) with a positive GVD. Pulses are obtained down to 200 fs in duration and up to 56 nJ in energy.

We report on the soliton-effect compression dynamics in single-mode SMF-28 fiber of picosecond pulses generated by an all-fiber MOPA-source based on a mode-locked thulium-doped fiber oscillator with an all-fiber dispersion management and a two-stage thulium and ytterbium co-doped watt-level amplifier. Initial 5-ps-long pulses were compressed down to 314 fs after having been amplified up to 1.4 W average power, giving an almost 16 compression factor (Some figures may appear in colour only in the online journal)

We present a mode-locked thulium-doped fiber laser with intracavity group velocity dispersion (GVD) management by incorporating a low-loss single-mode germanium–silica fiber that introduces a significant amount of normal dispersion. Depending on the total GVD value, the laser generates picosecond or femtosecond pulses in the spectral band between 1930 and 1970 nm. Moreover, we demonstrate an amplifier based on an ytterbium and thulium co-doped GTWave-fiber that also acts as an external pulse compressor. We have obtained amplified pulses with durations from several picoseconds down to 200 fs and energy up to 56 nJ.