High energy laser pulse compression


High power stretched flexible hollow core fiber pulse compressor


Our stretched-flexible hollow-core fiber (SF-HCF) compressor SAVANNA-HP is tailored to those seeking high power laser compression, high compression factors (5-30x), or simply prefer a SF-HCF over a capillary system.

Just like in any classic hollow-core fiber compressor, the femtosecond pulses are broadened through nonlinear interaction with an adjustable noble gas pressure inside a hollow fiber and the resulting supercontinuum is then compressed using chirped mirrors.

To bring to the market a state-of-the-art SF-HCF technique, we established a collaboration between UltraFast Innovations (UFI®) and the Institute for Nanophotonics IFNANO in Göttingen. The fiber assembly from IFNANO is exceptionally robust and easy to align and enables nearly ideal wave-guiding with minimal losses, allowing self-phase modulation over an interaction length of up to 8 m. The incoupling is protected by a high-power shield, allowing input pulse parameters of few tens of mJ and up to 20 W average power (with active cooling up to several hundred Watts). By combining IFNANO's SF-HCFs and our chirped mirror compression, we offer an exceptional compression unit for modern lasers.

Key Product Features

  • Input pulse duration: <20fs up to hundreds of fs
  • Input pulse energy: up to few tens of mJ
  • Typical compression factor: 5 - 30 x
  • Fiber transmission: close to the theoretical limit
  • Fiber length: up to 8 m
  • Supported input peak power: Up to 400 GW at 10 W average power
  • Supported input average power: Up to several hundred Watts at 125 GW peak power
  • Active cooling for average powers > 20 W
  • Footprint: 300 - 1000 cm x 60 cm


[1] Relativistic-Intensity near-Single-Cycle Light Waveforms at KHz Repetition Rate
M. Ouillé, A. Vernier, F. Böhle, M. Bocoum, A. Jullien, M. Lozano, J-Ph. Rousseau, Z. Cheng, D. Gustas, A. Blumenstein, P. Simon, S. Haessler, J. Faure, T. Nagy, R. Lopez-Martens
Light: Science & Applications volume 9, 47 (2020)

[2] Generation of Three-Cycle Multi-Millijoule Laser Pulses at 318 W Average Power
T. Nagy, S. Hädrich, P. Simon, A. Blumenstein, N. Walther, R. Klas, J. Buldt, H. Stark, S. Breitkopf, P. Jójárt, I. Seres, Z. Várallyay, T. Eidam, J. Limpert
Optica 6, 1423 (2019)