title: High-power linearly-polarized picosecond thulium-doped all-fiber master-oscillator power-amplifier.
abstract: We demonstrated a linearly-polarized picosecond thulium-doped all-fiber-integrated master-oscillator power-amplifier system, which yielded 240 W of average output power at 127 MHz repetition rate. The seed source is a passively mode-locked polarization-maintaining thulium-doped all-fiber oscillator with a nearly transform-limited pulse duration of 10 ps. In combination with a pre-chirp fiber having a positive group velocity dispersion and a three stage polarization-maintaining thulium-doped all-fiber amplifier, output pulse energies up to 1.89 µJ with 42 kW pulse peak power are obtained without the need of complex free-space stretcher or compressor setups. To the best of our knowledge, this is the highest average output power ever reported for a picosecond all-fiber-integrated laser at 2 µm wavelength region.
authors.forename: Jiang
authors.initials: J
authors.lastname: Liu
authors.forename: Chen
authors.initials: C
authors.lastname: Liu
authors.forename: Hongxing
authors.initials: H
authors.lastname: Shi
authors.forename: Pu
authors.initials: P
authors.lastname: Wang