Abstract

We report on a thin-disk multipass amplifier delivering radially polarized laser pulses with an average power of 635 W and 2.1 mJ of pulse energy. To the best of our knowledge, this is the highest average output power and pulse energy reported so far for radially polarized ultrafast lasers. The amplifier is seeded by a TruMicro5050 with 115 W of average output power, 6.5 ps pulse duration, and a repetition rate of 300 kHz. A segmented half-waveplate was used for converting the linearly polarized beam into radial polarization in front of the amplifier. We present a scheme for direct amplification of such doughnut-shaped radially-polarized beams, the results obtained, and a solution to compensate for the depolarizing phase shift introduced by the tilted mirrors in the amplifier.

© 2015 Optical Society of America

1.1  kW average output power from a thin-disk multipass amplifier for ultrashort laser pulses

Jan-Philipp Negel, Andreas Voss, Marwan Abdou Ahmed, Dominik Bauer, Dirk Sutter, Alexander Killi, and Thomas Graf
Opt. Lett. 38(24) 5442-5445 (2013)

Ultrafast thin-disk multipass laser amplifier delivering 1.4 kW (4.7 mJ, 1030 nm) average power converted to 820 W at 515 nm and 234 W at 343 nm

Jan-Philipp Negel, André Loescher, Andreas Voss, Dominik Bauer, Dirk Sutter, Alexander Killi, Marwan Abdou Ahmed, and Thomas Graf
Opt. Express 23(16) 21064-21077 (2015)

Cryogenic Yb:YAG composite-thin-disk for high energy and average power amplifiers

Luis E. Zapata, Hua Lin, Anne-Laure Calendron, Huseyin Cankaya, Michael Hemmer, Fabian Reichert, W. Ronny Huang, Eduardo Granados, Kyung-Han Hong, and Franz X. Kärtner
Opt. Lett. 40(11) 2610-2613 (2015)

Novel thin-disk oscillator concept for the generation of radially polarized femtosecond laser pulses

Michael Eckerle, Tom Dietrich, Frederik Schaal, Christof Pruss, Wolfgang Osten, Marwan Abdou Ahmed, and Thomas Graf
Opt. Lett. 41(7) 1680-1683 (2016)

Azimuthally polarized picosecond vector beam with 1.7 kW of average output power

André Loescher, Christoph Röcker, Thomas Graf, and Marwan Abdou Ahmed
Opt. Lett. 46(14) 3492-3495 (2021)