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.

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.

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 - 16 bit
  • High speed real time measurement
  • USB 2.0 full speed interface to PC


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



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
  • TCP/IP software interface for integration into remote controlled systems (under development)