HIGH-END CUSTOMIZED SOLUTIONS

A central emission wavelength of 2 µm generated by Thulium-doped amplifiers has enabled a multitude of new applications. AFS offers the highest performance among commercially available 2-µm fiber-based ultrafast laser systems.

AFS ultrafast fiber lasers are characterized by an outstanding performance combined with flexibility and maximum stability. All essential parameters are software controlled and can be tuned over a wide range, making them an extremely valuable tool in many applications.

 

APPLICATION EXAMPLES
 
• Materials processing
• Micro- and nano-machining
• Generation of high harmonics (HHG) 
• Pumping of optic-parametric amplifiers (mid-IR OPA)

 

 

 

Ultra-compact version

Single-channel version

Multi-channel version

Central wavelength

1950 nm

Repetition rate

25 MHz

Tunable from 50 kHz ... 25 MHz

Pulse energy

150 nJ

up to 200 µJ

up to 1 mJ

Peak power

> 3 MW

up to 250 MW

up to 1 GW

Average power

20 W

up to 50 W

up to 200 W

Pulse duration

50 fs

150 fs ... 5 ps adjustable

Polarization

linear

Beam quality

close to diffraction-limited, M2< 1.3

Average power stability

< 0.5% RMS

< 1% RMS

Pulse energy stability

< 1% RMS

Beam pointing

< 10 µrad RMS

< 20 µrad RMS

Dimensions laser (W×D×H)

approx. 112 × 41 × 20 cm³

approx. 142 × 41 × 20 cm³

200 x 100 x 35 cm³

Mass

approx. 50kg

approx. 100 kg

 approx. 250 kg

Extensions

Mid-IR (5-18 µm)

Nonlinear compression

Nonlinear compression, FAST SWITCH

Additional features

Turnkey reliability, all parameters software-controlled, temperature-stabilized and dust-sealed housing

 

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PRODUCT SHEET (.pdf)

 

 

 

FLEXIBLE PARAMETERS COMBINED WITH HIGH PERFORMANCE

AFS’s customized kW average power and multi-mJ pulse energy ultrafast laser systems are based on AFS leading-edge fiber technology. They unite multiple main-amplifier channels using coherent combination, a technology which AFS has matured to an industrial grade. All essential parameters are software-controlled and can be tuned over a wide range, making them an extremly valuable tool for numerous application.

 

APPLICATION EXAMPLES
 
• Materials processing
• Micro- and nano-machining
• Generation of high harmonics (HHG)

 

Overview of the available configurations

 

  HIGH REPETITION-RATE HIGH PULSE-ENERGY
Pulse energy up to 100 µJ (more on request) up to 20 mJ 
Average power up to 1 kW up to 2 kW
Peak power up to 1 GW up to 60 GW
Central wavelength 1030 nm (1950 nm on request)
Pulse repetition rate tunable between single-shot and 250 MHz tunable between single-shot and 20 MHz (80MHz on request)
Pulse duration < 300 fs ... 5 ps, adjustable (others on request)
Polarization linear
Beam quality close to diffraction-limited (M2<1.3)
Average-power stability <0.5 % RMS
Pulse-energy stability <0.5 % RMS
Beam-pointing stability <20 µrad RMS
Additional features Turnkey, completely software-controlled, temperature-stabilized dust-sealed housings
Options SHG, THG, HHG, Nonlinear compression, FAST SWITCHGHz-BURST, CEP-stability

 

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Sources of short-wavelength radiation, such as synchrotrons or free-electron lasers, have already enabled numerous applications and will facilitate more seminal studies. On the other hand, sources of coherent extreme ultraviolet to soft x-ray radiation via high-harmonic generation (HHG) of ultrashort-pulse lasers have gained significant attention in the last years due to their enormous potential to address a plethora of applications in a cost-effective and tabletop format. Therefore, they constitute a complementary source to large-scale facilities. The photon-flux values obtained by Fiber-laser-driven HHG sources can be considered the highest of all laser systems for photon energies between 20-150 eV. AFS ultrafast fiber lasers are ideal high-harmonic drivers. These turnkey HHG beamlines can address several applications in the EUV to X-ray spectral region.

 

APPLICATION EXAMPLES
 
• Photoelectron spectroscopy
• Coherent diffractive imaging - CDI (nanoscope)
• Attosecond science

 

 

Photon energy 21 eV 90 eV
Wavelength 59 nm 13 nm
Photon flux per harmonic up to 1014 s-1 up to 5 ⋅ 1010 s-1
Average power up to 500 µW up to 0.7 µW
Repetition rate flexible, up to 10 MHz 
Pulse duration The pulse duration is smaller than the laser pulse duration i.e. <30 or shorter
Relative bandwidth of one harmonic < 10-2 < 7 ⋅ 10-3
Beam profile Gaussian
Dimensions of HHG chamber approx. 80 cm x 40 cm x 40 cm
Additional features Turnkey reliability, high stability, all parameters software-controlled
Options Single harmonic selection, separation of XUV radiation an driving laser

 

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PRODUCT SHEET (.pdf)

 

 

 

NONLINEAR COMPRESSION (NC)

Nonlinear compression is an elegant way to shorten the pulse duration of pulses beyond the capabilities of the employed laser gain medium. It is characterized by highest beam quality and stability, power scalability and high efficiency. In addition, the technique perfectly fits to AFS fiber-based ultrafast laser systems in terms of mode-matching. The nonlinear-compression add-on can be applied to a large span of pulse energies ranging from µJ to several mJ, supports average powers in the kW-range and enables high quality few-cycle pulses when starting from pulses as long as 300 fs.

 

Illustration of the nonlinear compression

 

Pulse energy   up to 1.5 mJ
Average power   up to 250 W
Pulse duration   down to 6fs
Beam quality   Close to diffraction-limited (M2<1.3)
Average-power stability   < 1 % RMS
Pulse-energy stability   < 1 % RMS
Beam pointing   < 20 µrad RMS

 

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A stable carrier-envelope phase is a key requirement for many applications, in particular when working with few-cycle pulse-durations. AFS offers CEP-stability as an upgrade for most ultrafast laser system.

 

CEP stability   <350 mrad integrated CEP noise within 10Hz to 50kHz

 

 

Exemplary measurement of the phase noise of a CEP-stable high-power few-cycle fiber laser system.

 

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 ROBUST AND COMPACT

 

Frequency combs in the molecular finger-print region have enabled applications in metrology, spectroscopy and medicine. All these applications benefit from higher average powers that allow for faster acquisition rates and an improved signal-to-noise ratio.  This extension complements the compact 50fs-thulium-doped ultrafast fiber laser system and provides a high-power frequency comb in the mid-IR.

The ultrafast mid-IR pulses are achieved through intra-pulse difference-frequency generation, which guarantees passive carrier-envelope-offset stability. The complete frequency-comb nature of the source can be achieved by controlling and stabilizing the fundamental pulse-repetition frequency of the driving laser.

 

 

Central wavelength   5 - 18 µm (tunable)
Pulse repetition rate   20MHz (others on request)
Average power   up to 100 mW
Polarization   linear
Beam quality   close to diffraction-limited (M2<1.3)
Average power stability   < 1% RMS
Pulse energy stability   < 1% RMS
Beam pointing   < 10 µrad
Addional features   Turnkey reliability, temperature-stabilized and dust-sealed housing

 

Measured Mid-IR spectrum in publication of collaborators

 

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PRODUCT SHEET (.pdf)

 

 

 

 

Fiber amplifiers are able to provide several orders of magnitude of gain and can be adapted to boost smallest input signals. These features make ytterbium-doped fiber-based amplifiers to the ideal platform for customized amplifier solutions.

 

High performance femtosecond fiber laser systems

 

Wavelength range   1020 nm – 1070 nm
Minimal input power   >200µW average power
Input repetition rates   10 kHz – 100 MHz
Optional pulse picker   to address repetition rates between single-shot and 100 MHz
Output pulse energy   up to 20 mJ
Output average power   up to 2 kW
Beam quality   close to diffraction-limited (M2 <1.3)

 

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INDUSTRIAL-GRADE LASERS

A central emission wavelength of 2 µm generated by Thulium-doped amplifiers has enabled a multitude of new applications. AFS offers the highest performance among commercially available 2-µm fiber-based ultrafast laser systems.

AFS ultrafast fiber lasers are characterized by an outstanding performance combined with flexibility and maximum stability. All essential parameters are software controlled and can be tuned over a wide range, making them an extremely valuable tool in many applications.

 

APPLICATION EXAMPLES
 
• Materials processing
• Micro- and nano-machining

 

   

Central wavelength

Tunable between 1860 nm and 1960 nm

Repetition rate

10 kHz

Pulse energy

up to 500µJ

Average power

up to 5W

Pulse duration

< 50 ns

Polarization

linear

Beam quality

M² < 1.2

Average power stability

<1% RMS deviation

Pulse energy stability

<1% RMS deviation

Beam pointing

< 20µrad RMS deviation

 

  All parameters can be customized in a wide range. 

 

Examples for narrow-linewidth Q-switch operation
tunable in a wide spectral range.

Output pulse with 42 ns duration at >500 µJ pulse energy and near diffraction-limited beam quality (inlet).

 

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PRODUCT SHEET (.pdf)

 

 

 OPTIMIZED FOR COMPACTNESS AND PRICE

 

The quality of any laser appication crucially depends on the performance of the driving light source, i.e. the laser itself. In addition, most applications ask for more and more average power from the laser source to be cost-effective or sensitive enough. 

AFS ultrafast fiber lasers are characterized by an outstanding performance combined with flexibility and maximum stability. All essential parameters are software controlled and can be tuned over a wide range, making them an extremely valuable tool in many applications.

 

APPLICATION EXAMPLES
 
• Materials processing
• Micro- and nano-machining
• Generation of high harmonics (HHG) 

 

 

Pulse energy   up to 400 µJ 
Average power   up to 100 W
Central wavelength   1030 nm
Pulse repetition rate   tunable between single-shot and 20 MHz (up to 80MHz on request)
Pulse duration   < 250 fs ... 5 ps, adjustable, others on request
Polarization   linear
Beam quality   close to diffraction-limited (M2<1.3)
Average-power stability   < 0.2% RMS
Pulse-energy stability   < 0.5% RMS
Beam pointing   < 10 µrad RMS (< 5% nat. divergence)
Beam diameter   approx. 3mm
Dimensions laser   approx. 112 x 41 x 20 cm³
Mass   approx. 80 kg
Additional features   Turnkey reliability, all parameters software-controlled, temperature-stabilized and dust-sealed housing
Add-ons   SHG, THG, HHG, Nonlinear compression, GHz-BURST, CEP-stability

 

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BURST

Applying an femtosecond-pulse burst instead of an energetic single pulse holds the promise to significantly improve materials processing at highest average powers. AFS ultrafast fiber-laser systems can be operated in a burst mode with negligible variation of pulse duration over the burst and with a flexible pulse structure.

 

Illustration of the pulse burst

 

FAST SWITCH

As a part of AFS leading-edge fiber laser technology, the fast pulse-switching feature provides an optional extension of the laser‘s capability. 

Single-pulse selection can be achieved up to 10 GHz repetition rate with this patented technology. Full control over the pulse sequence is guaranteed on both their occurrence and their amplitude, which can be adapted to the customers needs. Most important, the ultrafast modulator works at highest average power levels without any detrimental effects on the laser characteristics.

 

Illustration of the fast switch

 

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PRODUCT SHEET (.pdf)

 

 

Mode-locked fiber lasers are compact and reliable seed sources for your application or your amplification stages. Flexible parameters in terms of pulse duration, repetition rate and performance can be realized.

 

High performance femtosecond fiber laser systems

 

Center wavelength   1020 nm – 1070 nm
Pulse energy   up to 150 nJ
Average power   up to 3 W
Pulse duration   50 fs – 100 ps
Pulse repetition rate   50 kHz – 20 MHz
Emission   free-space or fiber-coupled output

 

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LASERS FOR BIO-MEDICAL IMAGING

 

Compact, alignment-free and all-fiber picosecond laser source for CARS microscopy delivering synchronized pump and Stokes pulses from a single fiber end. This air-cooled and turn-key CARS laser source has a great benefit for the user as the fiber delivery eliminates alignment of the spatial and temporal pulse overlap. High quality and high-speed microscopic multimodal nonlinear imaging is possible by e.g. simultaneously probing the CARS CH-vibrational-levels of lipids around 2850 cm-1, the second harmonic generation (SHG) and the two-photon excited fluorescence (TPEF) signals.

 

APPLICATION EXAMPLES
 
• CARS spectroscopy and microscopy
• Microscopic multi-modal nonlinear imaging (CARS, SHG, TPEF)
•SRS microscopy

 

Multimodal composite image of human connective tissue showing an overlay of the CARS (red), SHG (blue) and TPEF (green) signals.

Multimodal composite image of human connective tissue showing an overlay of the CARS (red), SHG (blue) and TPEF (green) signals.
Courtesy of IPHT Jena.

 

 
  Version for CARS Version for CARS & SRS
 
Frequency difference tunable between 2700 cm-1 and 3300 cm-1 tunable between 930 cm-1 and 3300 cm-1
Pulse duration <30 ps <20 ps
Dimensions of laser head 26 cm x 32 cm x 15 cm 56 cm x 41 cm x 14 cm
Weight <15 kg <35 kg
 
STOKES PULSES    
Repetition rate from 1 MHz up to 3 MHz 18 MHz
Wavelength approx. 1030 nm approx. 1035 nm
Average power >100 mW >200 mW
Pulse peak power >1 kW >0.5 kW
Spectral width <15 cm-1 <5 cm-1
 
PUMP PULSES    
Repetition rate from 1 MHz up to 3 MHz 9 MHz
Wavelength approx. 800 nm approx. 850 nm
Average power >10 mW >50 mW
Pulse peak power >1 kW >0.5 kW
Spectral width <40 cm-1 <20 cm-1

 

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PRODUCT SHEET (.pdf)

 

 

 

Mode-locked fiber lasers are compact and reliable seed sources for your application or your amplification stages. Flexible parameters in terms of pulse duration, repetition rate and performance can be realized.

 

High performance femtosecond fiber laser systems

 

Center wavelength   1020 nm – 1070 nm
Pulse energy   up to 150 nJ
Average power   up to 3W
Pulse duration   50 fs – 100 ps
Pulse repetition rate   50 kHz – 20 MHz
Emission   free-space or fiber-coupled output

 

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