Hollow-Core Fiber Compressor


SAVANNA is a hollow core fiber compressor that shortens the input pulses duration after spectral broadening. First, the spectral bandwidth is broadened by nonlinear interaction of highenergy femtosecond pulses with a noble gas inside a hollow core fiber.
The resulting supercontinuum pulses are then compressed using ultra-broadband chirped mirrors. This gives rise to 5-6 times shorter pulses since the increased spectral width supports shorter pulse durations than the original input. SAVANNA is based on our extensive expertise generating intense few-cycle pulses for attosecond research and combines high transmission with unique ultra-broadband compression. Besides pulse compression, the extremely broadband output is of interest in state-of-the-art spectroscopy experiments.

Key Product Features

  • Input Pulse Duration: up to 60 fs (as short as possible)
  • Input pulse energy: 0.5 - 2 mJ (optimum: 1 - 1.5 mJ)
  • Repetition rate: 1 - 10 kHz
  • Typical compression factor: 5 - 6 x
  • Fiber transmission: up to 70%
  • White light spectral bandwidth:
    • 270 - 1000 nm (achievable with optimal input)
    • 400 - 900 nm (with commercial 25 fs laser)
  • Broadband source for spectroscopy applications
  • Footprint: 300 x 60 cm2


[1] Broadband 7-fs diffractive-optic-based 2D electronic spectroscopy using hollow-core fiber compression
X. Ma, J. Dostál, T. Brixner
Optics Express 24, 268867 (2016)

[2] Synthesized Light Transients
A. Wirth, M. Th. Hassan, I. Grguraš, J. Gagnon, A. Moulet, T. T. Luu, S. Pabst, R. Santra, Z. A. Alahmed, A. M. Azzeer, V. S. Yakovlev, V. Pervak, F. Krausz, E. Goulielmakis
Science 334, 195 (2011)

[3] Intense 1.5-cycle near infrared laser waveforms and their use for the generation of ultra-broadband soft-x-ray harmonic continua
A. L. Cavalieri, E. Goulielmakis, B. Horvath, W. Helml, M. Schultze, M. Fieß, V. Pervak, L. Veisz, V. S. Yakolev, M. Uiberacker
New Journal of Physics 9, 242 (2007)

[4] Powerful 170-atoosecond XUV pulses generated with few-cycle pulses and broadband multilayer optics
M. Schultze, E. Goulielmakis, M. Uiberacker, M. Hofstetter, J. Kim, F. Krausz, U. Kleineberg
New Journal of Physics 9, 243 (2007)