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Authors: Beirow, Frieder
Eckerle, Michael
Dannecker, Benjamin
Dietrich, Tom
Abdou Ahmed, Marwan
Graf, Thomas
Title: Radially polarized passively mode-locked thin-disk laser oscillator emitting sub-picosecond pulses with an average output power exceeding the 100 W level
Issue Date: 2018 Zeitschriftenartikel 4401-4410 Optics express 26 (2018), pp. 4401-4410
ISSN: 1094-4087
Abstract: We report on a high-power passively mode-locked radially polarized Yb:YAG thin-disk oscillator providing 125 W of average output power. To the best of our knowledge, this is the highest average power ever reported from a mode-locked radially polarized oscillator without subsequent amplification stages. Mode-locking was achieved by implementing a SESAM as the cavity end mirror and the radial polarization of the LG*01 mode was obtained by means of a circular Grating Waveguide Output Coupler. The repetition rate was 78 MHz. A pulse duration of 0.97 ps and a spectral bandwidth of 1.4 nm (FWHM) were measured at the maximum output power. This corresponds to a pulse energy of 1.6 μJ and a pulse peak power of 1.45 MW. A high degree of radial polarization of 97.3 ± 1% and an M2-value of 2.16 which is close to the theoretical value for the LG*01 doughnut mode were measured.
Appears in Collections:07 Fakultät Konstruktions-, Produktions- und Fahrzeugtechnik

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