pulseCheck USB

Pulse Diagnostics

A·P·E offers a choice of solutions for ultrafast pulse measurements. Each is tailored to your type of laser system, with a wealth of innovations for greater accuracy and user simplicity.


From material processing to scientific and medical base research, ultrafast laser systems are used in many areas of their high peak intensity and extremely short pulse width. 
One relevant area of application is time resolved spectroscopy. The pulse width is a critical factor for the adjustment of these laser systems and the characterization of experiments. A∙P∙E autocorrelators measure this parameter from 10 fs ... 500 ps for almost any wavelength range.


The autocorrelator pulseCheck USB is a versatile instrument for measuring the pulse width of different fs and ps laser systems with the ability to cover a broad wavelength range using different Optics Sets1), which can be upgraded in the field.

The pulseCheck USB with pulseLink controller combines the standard pulseCheck optical head with the new pulseLink controller replacing the standard control unit of the pulseCheck. It controls the measuring process, while being connected via USB to the Control Software running on the customer’s computer.

Enabled by a special scanner design and a real time position measurement system the instrument offers a linear time scale and different factory calibrated scan ranges. In combination with a high resolution digitization and fast processing, the pulseLink provides the measured autocorrelation function and pulse width data at a high refresh rate and with a very high precision.

FROG Option converting the autocorrelator pulseCheck USB into a device which allows for phase-resolved measurements and hence more detailed analysis of ultrafast pulses.

Furthermore the center wavelength of the input laser beam is derived from the interferometric autocorrelation data. Using an external trigger the measuring process is also optimized for the measurement of low repetition rate lasers.
The included Control Software allows for easy data export for further analysis.

Please see pulseCheck USB MIR for a wavelength range from 2 ... 12 µm.

Watch our pulseLink video!

1) An Optics Set consists of a mounted non-linear crystal as well as a detector. When upgrading Optic Sets, please ask A·P·E or your distributor for details.

  • Autosetup: crystal tuning | signal amplification
  • Trigger input - for broad variety of trigger signals
  • High resolution data acquisition
  • High speed real time measurement
  • Standard Software Interface (using TCP/IP)


Version 15 50 150
Scan ranges 150 fs ... 15 ps 500 fs ... 50 ps 1.5 ps ... 150 ps
Delay resolution < 0.5 fs < 1 fs < 1 fs
Measurable pulse width < 50 fs ... 3.5 ps < 50 fs ... 12 ps < 50 fs ... 35 ps
Input polarization linear / horizontal (polarization rotator optionally for vertical input)
Diameter input aperture 6 mm (open) or 3 mm (in adjustment position)
Sensitivity1) for VIS 1, VIS 2, NIR and IR

Photomultiplier tube (PMT): 10-4W2 (higher sensitivity optional)
Photodiode (PD): 1W2

Wavelength ranges

NIR ext range2) (PD)
IR ext range2) (PD)
Extended IR2) (PD)
Cross 1
Cross 2

420 ... 550 nm
540 ... 750 nm
700 ... 1100 nm
700 ... 1250 nm
1000 ... 1600 nm
1250 ... 2000 nm
1700 ... 2400 nm
360 ... 450 nm (interaction with 720 ... 900 nm)
260 ... 320 nm (interaction with 780 ... 960 nm)

(others optional between 200 nm and 2.4 µm),
pulseCheck USB MIR for wavelength ranges between 2 ... 12 µm
1) Sensitivity is defined as average power times peak power of the incident pulses PAV * PPeak.
When configurating the pulseCheck USB with multiple optics sets, custom optics sets, or on the pulseCheck USB MIR sensitivity may be lower than specified above.
2) With photodiode (PD) only



Here you can download some examples that demonstrate how to use the Standard Software Interface (using TCP/IP) with common programming languages:


This device is available directly via A·P·E and in the countries listed below via our exclusive distribution partners:

Australia: Coherent Scientific

China: Pinnacle / PulsePower

France: Optoprim

Great Britain and Ireland: Photonic Solutions

India: Laser Science

Israel: Ammo Engineering

Japan: Phototechnica

Korea: RayVis

Poland: Eurotek

Scandinavia, Baltic States: Gammadata

Singapore: AceXon

Spain, Portugal: Innova Scientific

Switzerland: Dyneos

Taiwan: SuperbIN

USA, Canada, Middle and South America: A.P.E America

  • Additional Optics Sets
  • Fiber input
  • Input polarization rotator
  • Measurement of pulses down to 10 fs @ 800 nm (ShortPulse option)
  • Enhances sensitivity with dedicated Optics Sets
  • Customized wavelength ranges
  • FROG Option for phase-resolved measurements

A selection of publications mentioning the use of the pulseCheck:

Barbarin et al., Characterization of a 15 GHz integrated bulk InGaAsP passively modelocked ring laser at 1.53μm,
Optics Express, Vol. 14, Issue 21, pp. 9716-9727 (2006), Link (DOI) | Link

Chapman et al., Femtosecond pulses at 20 GHz repetition rate through spectral masking of a phase modulated signal and nonlinear pulse compression,
Optics Express, Vol. 21, Issue 5, pp. 5671-5676 (2013), Link (DOI) | Link

Finch et al., Femtosecond pulse generation in passively mode locked InAs quantum dot lasers,
Applied Physics Letters, Vol. 103, No. 13, pp. 131109ff (2013), Link (DOI) | Link

Kjellberg et al., Momentum-map-imaging photoelectron spectroscopy of fullerenes with femtosecond laser pulses,
Physical Review A, Vol. 81, Issue 2, (2010), Link (DOI) | Link

Mosley et al., Ultrashort pulse compression and delivery in a hollow-core photonic crystal fiber at 540 nm wavelength,
Optics Letters, Vol. 35, Issue 21, pp. 3589-3591 (2010), Link (DOI) | Link

Mou et al., Passively harmonic mode locked erbium doped fiber soliton laser with carbon nanotubes based saturable absorber,
Optical Materials Express, Vol. 2, Issue 6, pp. 884-890 (2012), Link (DOI) | Link

Nillon et al., Versatile dual stage tunable NOPA with pulse duration down to 17 fs and energy up to 3 μJ at 500 kHz repetition rate,
The European Conference on Lasers and Electro-Optics (2013), Link (DOI) | Link

Sun et al., A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,
Nano Reserach, Vol. 3, Issue 9, pp. 653-660 (2010), Link (DOI) | Link

Yin et al., Relation between exciplex formation and photovoltaic properties of PPV polymer-based blends,
Solar Energy Materials and Solar Cells, Vol. 91, Issue 5, pp. 411–415 (2007), Link (DOI) | Link

Homann et al., Seeding of picosecond and femtosecond optical parametric amplifiers by weak single mode continuous lasers,
Optics Express, Vol. 21, Issue 1, pp. 730-739 (2013), Link (DOI) | Link

Liu et al., High-power wavelength-tunable photonic-crystal-fiberbased oscillator-amplifier-frequency-shifter femtosecond laser system and its applications for material microprocessing,
Laser Physics Letters, Vol. 6, Issue 1, pp. 44-48 (2009), Link (DOI) | Link

Nomura et al., Observation and analysis of structural changes in fused silica by continuous irradiation with femtosecond laser light having an energy density below the laser-induced damage threshold,
Beilstein Journal of Nanotechnology, Vol. 5, pp. 1334-40 (2014), Link (DOI) | Link

Riedel et al., Long-term stabilization of high power optical parametric chirped-pulse amplifiers,
Optics Express, Vol. 21, Issue 23, pp. 28987-28999 (2013), Link (DOI) | Link