Abstract
The first-order helical Laguerre–Gaussian mode (also called donut mode) is used to improve the energy throughput of nonlinear spectral broadening in gas-filled multipass cells. The method proposed in this Letter enables, for the first time to the best of our knowledge, the nonlinear spectral broadening of pulses with energies beyond 100 mJ and is suitable for an average power of more than 500 W while conserving an excellent spatio-spectral homogeneity of ${\sim}98\%$ and a Gaussian-like focus profile. Additionally compressibility from 1.3 ps to 37 fs is demonstrated.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Martin Kaumanns, Vladimir Pervak, Dmitrii Kormin, Vyacheslav Leshchenko, Alexander Kessel, Moritz Ueffing, Yu Chen, and Thomas Nubbemeyer
Opt. Lett. 43(23) 5877-5880 (2018)
Michael Müller, Joachim Buldt, Henning Stark, Christian Grebing, and Jens Limpert
Opt. Lett. 46(11) 2678-2681 (2021)
Moritz Ueffing, Simon Reiger, Martin Kaumanns, Vladimir Pervak, Michael Trubetskov, Thomas Nubbemeyer, and Ferenc Krausz
Opt. Lett. 43(9) 2070-2073 (2018)