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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CA_P_34

Power scalable spectral broadening in bulk crystals with more than 100 W average power

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Abstract

Laser oscillators and amplifiers employing Yb:YAG or Yb:glass are used for many applications requiring high peak powers, e.g. attosecond science or spectroscopy. However, the unspectacular spectral bandwidth of < 6 nm typically obtained with these gain-materials calls for other means to post-compress the generated pulses in order to reach interesting peak-power levels or even the few-cycle pulse regime where extremely nonlinear effects like high-harmonic generation become feasible. Spectral broadening in bulk crystals seems to be an attractive alternative to current approaches that require gas filled photonic crystal fibers or capillaries and mJ pulse-energies [1–3]. The presented method relies on exploiting self-phase-modulation in bulk crystals but avoiding critical self-focusing or white-light generation. This results in good beam-quality and high efficiency. Moreover it is insensitive to alignment [4, 5]. Here, we report on the energy/power-scalability of this approach.

© 2015 IEEE

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