High power stretched flexible hollow core fiber pulse compressor


The SAVANNA-HP is the result of a collaboration between UltraFast Innovations and the Institute for Nanophotonics in Göttingen IFNANO. The stretched flexible hollow core fiber (SF-HCF) compressor spectrally broadens high-energy femtosecond input pulses by nonlinear interaction with a noble gas of adjustable gas pressure inside a hollow fiber and subsequently compresses the pulse using chirped mirror technology from UltraFast Innovations. The state of the art SF-HCF technique from IFNANO allows nearly ideal wave guiding reducing the losses to a minimum and allows accumulation of self-phase modulation over an interaction length of up to 8 m. The incoupling is protected by a high power shield allowing extreme input parameters of few tens of mJ pulses and an average power of up to 20 W (with active cooling up to several hundred Watts). Combining the SF-HCFs from IFNANO and our chirped mirror compression, we provide an unmatched compression unit for today's state of the art lasers.

Key Product Features

  • Input pulse duration: up to hundreds of fs (as short as possible)
  • 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)