SAVANNA-HP — High-Power Stretched Flexible Hollow-Core Fiber Compressor (up to 400 GW, 100 W+)

SAVANNA-HP is designed for high-power laser compression, capable of compressing original laser pulse duration by 5-30× down to the few-cycle regime while maintaining excellent beam profile and superior spectral homogeneity.

SAVANNA-HP is the result of a collaboration between UltraFast Innovations (UFI®) 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 pressure, then compresses the pulse using UFI's chirped-mirror technology.

The state-of-the-art SF-HCF assembly from IFNANO offers ease of alignment, nearly ideal wave guiding with minimum losses, and accumulation of self-phase modulation over up to 8 m. It allows extreme input parameters of energies beyond 10 mJ and average powers beyond 100 W.

Key Product Features

• Individually tailored for optimal performance
• Input pulse duration: <20 fs up to hundreds of fs
• Input pulse energy: up to few tens of mJ
• Typical compression factor: 5-30 ×
• Fiber transmission: up to >90% (close to theoretical limit)
• Fiber length: up to 8 m
• Supported input peak power: Up to 400 GW (at 10 W avg)
• Supported input average power: Up to several hundred W (at 125 GW peak)
• High-power shield: prevents fiber damage, increases lifetime
• Active cooling for average powers > 20 W
• Footprint: 300-1200 cm × 60 cm

Customization Options

• Variable spectrum selection
• Flexible dispersion management
• Custom reflective mirror telescope with astigmatism compensation
• Custom TOD compensation mirrors
• In-coupling / Out-coupling chamber with Z-lock unit
• Pressure-stabilized single/double differentially pumped setup
• Active beam pointing stabilization unit

References

1. M. Ouillé et al., Light Sci. Appl. 9, (2020) — Relativistic-Intensity near-Single-Cycle Light Waveforms at kHz Repetition Rate
2. T. Nagy et al., Optica 6, (2019) — Generation of Three-Cycle Multi-Millijoule Laser Pulses at 318 W Average Power

Developed at the Max-Planck-Institute of Quantum Optics. UFI is a spin-off from LMU Munich and the Max Planck Society.