High-power single-stage single-crystal Yb:YAG fiber amplifier for radially polarized ultrashort laser pulses

Michael Eckerle (1, 2) , Frieder Beirow (2) , Tom Dietrich (2) , Frederik Schaal (3) , Christof Pruss (3) , Wolfgang Osten (3) , Nicolas Aubry (4) , Matthieu Perrier (4) , Julien Didierjean (4) , Xavier Delen (5) , François Balembois (5) , Patrick Georges (5) , Marwan Abdou Ahmed (2) , Thomas Graf (2)

1 GSaME - Graduate School of Excellence advanced Manufacturing Engineering [Stuttgart]
2 IFSW - Institut für Strahwerkzeuge
3 Institut für Technische Optik [Universität Stuttgart]
4 Fibercryst
5 Laboratoire Charles Fabry / Lasers

We report on a single-stage high-power amplification of a radially polarized mode-locked laser beam in a single-crystal fiber (SCF) amplifier. The seed beam was amplified by a factor of 5.0 to an average output power of 66.3 W. The pulse duration of the amplified pulses was measured to be 909 fs at a repetition rate of 40.7 MHz, corresponding to a pulse energy of 1.63 \upmuJ and a resulting pulse peak power of 1.58 MW. The output beam showed a very high quality of the doughnut-shaped intensity distribution and furthermore a high radial polarization purity.

Domains: Physics [physics]; Physics [physics]; Optics [physics.optics]

Michael Eckerle, Frieder Beirow, Tom Dietrich, Frederik Schaal, Christof Pruss, et al.. High-power single-stage single-crystal Yb:YAG fiber amplifier for radially polarized ultrashort laser pulses. Applied Physics B - Laser and Optics, 2017, 123 (5), pp.1-6. ⟨10.1007/s00340-017-6720-0⟩. ⟨hal-01585940⟩