High Powered Hollow-Core Fiber Compressor | SIMTRUM Photonics Store

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 mirrorcompression, 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 

Customization Options

 Variable spectrum selection 

 Flexible dispersion management 

Custom reflective mirror telescope with astigmatism compensation

 In-coupling / Out-coupling chamber with Z-lock unit 

 Pressure-stabilized single / double differentially pumped setup 

 Active beam pointing stabilization unit

 Left: Retrieved temporal profile and ideal Fourier transform limited shape (FTL). 

 Right: Fiber output spectrum supporting 2.9 fs pulses. Input: 24 fs & 10 mJ into 

 2.5 m fiber

 Left: Spectrum (red) after broadening in a 6 m SF-HCF fiber and phase (blue) after

 compression. Right: Retrieved compressed pulse (red) and Fourier transform limited 

 shape (black). Inset: output beam profile. Results achieved by coupling 300 fs & 

 580W pulses into a 6 m fiber. 

 Output: 318 W in compressed 10 fs pulses