High power stretched flexible hollow core fiber pulse compressor
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 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: <20fs up to hundreds of fs
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
.
Ultra-broadband Chirped Mirror Technology:
Our double-angle chirped mirrors are a key component of the hollow core fiber compressor, providing unprecedented broadband compression. Our PC70 and PC1332 mirrors have been proven to produce pulses with a duration of < 3 fs. Custom solutions for specific spectral coverage and selection are available.
SF-HCF specifications:
Standard
Special
Complex
Custom
Max. peak power
125 GW
250 GW
125 GW
400 GW
125 GW
400 GW
Max. average power
10 W
10 W
20 W
10 W
100 W
> 100W
Max fiber length
3 m
4 m
6 m
8 m
Typical transmission*
80 %
75 %
70 %
65 %
Typical spectral broadening
15 x
20 x
30 x
45 x
* at 800 nm with max length, a fiber core of 400 μm and near ideal caustic.
Temporal and spectral pulse characteristics:
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, reprinted/adapted from [1].
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 & 580 W pulses into a 6 m fiber. Output: 318 W in compressed 10 fs pulses, reprinted/ adapted from [2].
References:
[1] M. Ouillé et. al, Relativistic-Intensity near-Single-Cycle Light Waveforms at KHz Repetition Rate,Light Sci. Appl. 9, (2020).
[2] T. Nagy et. al, Generation of Three-Cycle Multi-Millijoule Laser Pulses at 318 W Average Power,Optica 6, (2019)
商品属性 [脉宽] <20fs up to hundreds of fs [单脉冲能量] up to few tens of mJ