Hollow-Core Fiber Compressor

Hollow Core Fiber Compressor

The hollow core fiber compressor spectrally broadens high-energy femtosecond input pulses by nonlinear interaction with a noble gas of adjustable gas pressure inside a hollow fiber. Ultra-broadband chirped mirrors compress the white light pulses after the fiber, and the increased spectral width supports shorter pulse durations than the original input. Effectively, the device compresses the input pulses temporally by increasing their spectral bandwidth. Our device draws on extensive expertise in the generation of intense few-cycle pulses for attosecond research and combines high transmission with unique ultra-broadband compression. Besides pulse compression the extremely broadband fiber output addresses also state-of-the-art spectroscopy experiments.

The hollow core fiber compressor is ideal to generate intense few-cycle pulses with ultrabroad bandwidth from the output of Ti:Sa amplifiers. The output pulse duration of laser amplifiers is limited by gain narrowing to about 20 fs, and shorter pulses can only be reached with additional spectral broadening. Our hollow core fiber compressor couples the laser output with high efficiency into a noble-gas filled glas capillary, where nonlinear interaction broadens the input pulses. With our optimized design extreme spectral broadening to a coverage of up to 270-1000 nm has been shown.[2] Pulses after the fiber are compressed with our PC70 ultra-broadband chirped mirrors featuring our proprietary double-angle technology for the best available pulse-compression performance. As extensions to the hollow core fiber compressor we can provide an input beam stabilization module, a gas and vacuum handling system, and variable GDD management.


  • Best available compression with our ultra-broadband PC70 mirrors
  • Pulse compression down to < 5 fs (typical compression factor 5-6)
  • Fiber transmission: up to 70%
  • Spectral bandwidth of fiber output: 270-1000 nm (perfect input); 400-900 nm (typical commercial laser)
  • Variable GDD control available
  • Input beam stabilization package available
  • Gas handling system available
  • Suitable for any commercial laser with 0.5-2 mJ pulse energy and up to 60 fs pulse duration


  1. X. Ma, J. Dostál, T. Brixner, Broadband 7-fs diffractive-optic-based 2D electronic spectroscopy using hollow-core fiber compression, Opt. Expr. 2016, 24, 268867.
  2. 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, Synthesized Light Transients, Science 2011, 334, 195.
  3. A. L. Cavalieri, E. Goulielmakis, B. Horvath, W. Helml, M. Schultze, M. Fieß, V. Pervak, L. Veisz, V. S. Yakolev, M. Uiberacker, Intense 1.5-cycle near infrared laser waveforms and their use for the generation of ultra-broadband soft-x-ray harmonic continua, New J. Phys. 2007, 9, 242.
  4. M. Schultze, E. Goulielmakis, M. Uiberacker, M. Hofstetter, J. Kim, F. Krausz, U. Kleineberg, Powerful 170-atoosecond XUV pulses generated with few-cycle pulses and broadband multilayer optics, New J. Phys. 2007, 9, 243.