A new generation in short-pulse measurement tools

pulseCheck Autocorrelators Cover the Broadest Range of Wavelengths and Pulse Widths

UV to IR
200 nm ... > 12 µm

APE autocorrelators are available with a variety of exchangeable optical sets. This allows sensitive pulse duration measurements over an extremely wide wavelength range. Depending on the pulseCheck configuration, wavelengths in the UV range from 200 nm to the IR range above 12 µm are covered.

From 5 fs to 500 ps

Different pulseCheck configurations can be optimized according to individual pulse width measurement requirements. Extra long pulse durations are possible, for example, with the autocorrelator pulseCheck SM, which measures long pulses over a larger scanning range using fast and highly precise stepper motor technology.

NIST Traceable Calibration

An important requirement for quality assurance systems is the traceability of a measuring instrument to international or national standards. For this reason, all APE autocorrelator models are calibrated to a traceable standard according to NIST specifications (NIST = U.S. National Institute of Standards and Technology).

Each pulseCheck comes with a printed and signed calibration certificate. The calibration can of course be renewed at our premises or by a certified partner at any time.


At a Glance

* Measured sensitivity including Optics Set, defined as average power times peak power of the incident pulses PAV * Ppeak
Measurable Pulse Width RangeDepending on Base Unit:

< 10 fs ... 3.5 ps
< 10 fs ... 12 ps
< 50 fs ... 35 ps
< 20 fs ... 500 ps (SM)
Wavelength Range200 nm - 12 µm, depends on Optics Set
Optics SetsExchangeable
Detector (Optics Sets)PMT, PD, or TPA
Delay Resolution< 0.001 % of scan range; pulseCheck SM: 1 fs
Delay Linearity< 1 %
SensitivityTypically 1 ... 10-6 W2 depending on Optics Set*
Recommended Repetition RatePD, TPA: 10 Hz and above; PMT: 250 kHz and above
Type of Measurement ModePMT, PD : non-collinear intensity, collinear interferometric;
TPA: hybrid collinear intensity
Mode SwitchingAvailable for PMT, PD
SHG Tuning for Phase MatchingPMT/PD: automatic; TPA: not applicable
Trigger ModeTTL, f < 50 kHz; pulseCheck SM < 10 kHz
Input PolarizationLinear horizontal, vertical available as option
Input Beam CouplingFree-space; Option: fiber coupling FC/PC, FC/APC, SMA
Max Input Power1 W (e.g. oscillator with a rep. rate of approx. 70 MHz) or 10 μJ (e.g. amplified system with rep. rates in the kHz range), whichever results in lower value
Input Aperture6 mm (free-space)
SoftwareIncluded; Real-time display of pulse width and central wavelength, different fitting routines
Fitting RoutineGaussian, Sech2, Lorentz
Remote ControlPossible via TCP/IP (SCPI command set)
CalibrationNIST traceable calibration certificate included
  • Exchangeable Optics Sets for broadest spectrum coverage from 200 nm to 12 µm
  • Pulse widths from below < 10 fs all the way up to 500 ps
  • Ultra-precise delay resolution
  • Toggle between interferometric and intensity autocorrelation
  • Wide range of sensitivity levels covered with PMT, PD, and TPA
  • Automatic phase matching
  • Gaussian, Sech2, and Lorentzian fitting routines
  • Ready to use software and USB interface
  • TCP/IP remote control with standardized command set for easy programming
  • NIST traceable calibration

Datasheets & Brochures

APE FROG Rev. 3.1.2 (pdf / english)

 Step Files (.stp)

APE-pulseCheck-step-files-20140124 (.stp 3D CAD model with overall dimensions)

TCP/IP Sample Code for Remote Control

Contact Us

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Email & Phone Contacts

APE has distributors around the world to give you the best support. Choose a country to find your local sales contact:

APE Angewandte Physik & Elektronik GmbH
Plauener Strasse 163-165 | Haus N
13053 Berlin, Germany

Tel +49 30 986011-30
Fax +49 30 986011333


Coherent Scientific pty. Ltd.
Hilton SA 5033, South Australia

Phone: +61 8 8150 5200

PulsePower Technology Ltd.
Beijing, Haidan District
China 100090

Phone +86 10 62565117

Pinnacle Scientific Cooperation
Hangzhou, Jianggan District
China 310020

Phone +86 571 88225151

199 00 Praha 9, Česko

phone +420 212 247 293

Gammadata Instrument AB
750 02 Uppsala

Tel: +46 18 56 68 35

F 92170 Vanves, France

Tel: +33 1 419 061 80

Laser Sciences Services Pvt. Ltd.

Tel: +91 2778 1673

Photonic Solutions PLC
Edinburgh, UK

Tel: +44 131 664 8122

Ammo Engineering Ltd.
Petach Tikva 49517, Israel

Tel: +972 3 9239 666

Optoprim Srl.

Via Rota, 37
20900 Monza (MB)
Phone: +39 (039) 834977

Via Monte Giberto, 15
00138 Roma
Phone: +39 06 87657838

Phototechnica Corporation
Saitama 336-0017, Japan

Tel: +81 48 871 0067

Seoul 137-862, Korea

Tel: +82 2 3461 1103

Guty Cardenas 147, Guadalupe Inn
Ciudad de Mexico, C.P. 01020, Mexico

Main Contact: Vicente Garcia Gomez
Tel: 52 555 401 8254

Eurotek International
02-668 Warsaw, Poland

Tel: +48 2284 379 40

Innova Scientific S.L.
28290 Las Rozas de Madrid, Espana

Tel: +34 91 7105650

AceXon Technologies Pte. Ltd.
Singapore 658065

Tel: +65 (6565) 7300

Innova Scientific S.L.
28290 Las Rozas de Madrid

Tel: +34 91 7105650

SuperbIN Company Ltd.
Taipei 11493
Taiwan, R.O.C.

Tel: +886 2 265 706 78

Photonic Solutions PLC

Tel: +44 131 664 8122

APE Applied Physics & Electronics, Inc.
47635 Lakeview Blvd.
Fremont, CA 94538, USA

Tel: +1(888) 690-3250

Three Types of Detectors: PMT, TPA, PD

The three detector types address the need for low noise and enhanced sensitivity in different applications. For pulse measurement with extreme sensitivity and low pulse energy, we recommend our photomultiplier (PMT) detector. Spectrally enhanced photodiodes (PD, TPA), on the other hand, are the ideal choice for measurements requiring sensitivities of a few mW2.

FROG Option for pulseCheck

Complete pulse characterization using FROG is possible for most pulseCheck autocorrelators. FROG allows pulseCheck to measure the spectral and temporal bandwidth and phase. FROG can be upgraded by pulseCheck customers with just a few simple changes to the autocorrelator. With the supplied software, the laser pulse intensity is displayed as a function of time and frequency (wavelength). The result is visualized in the form of the common FROG trace diagram.

Rita – Working with pulseCheck

Working with pulseCheck: Basics

Working with pulseCheck: Advanced

Working with the pulseLink Controller

Further Features

Collinear and Non-Collinear Measurements

pulseCheck offers the possibility to measure both collinear and non-collinear. It is possible to switch between both modes.

Collinear Autocorrelation

Collinear Autocorrelation

In collinear mode, interference occurs between the two pulse trains. Such an autocorrelation is also called interferometric autocorrelation or fringe-resolved measurement. It is used in particular for very short pulses. The collinear mode provides additional qualitative information about the phase, the chirp and the central wavelength of the pulse.

Non-Collinear Autocorrelation

Non-Collinear Autocorrelation

In non-collinear mode the autocorrelation becomes background-free. This type of measurement is also called intensity autocorrelation. It enables a very high dynamic range to be achieved and weak satellites or echo pulses in the wingsof the pulse can be detected.

The pulseCheck in combination with TPA Optics Sets offers a “hybrid” of the two modes: the collinear intensity autocorrelation.

Automatic Phase Matching

Phase-sensitive, nonlinear processes require phase matching for highly efficient Second Harmonic Generation. pulseCheck achieves this fully automatically for any wavelength range, resulting in precise and fast operation with no manual adjustment needed. Because they perform the task of both detector and nonlinear optics, the TPA detectors provides tuning-free operation over a wide wavelength range.

Acquisition Software and TCP/IP Standard Software Interface

All models come with an easy to use data acquisition software, allowing for real-time data display. Furthermore, the TCP/IP-based standard software interface by APE makes it straight forward to set up remote control. This allows you, for example, to design your own automated measurement routines. Simply use our protocol templates for rapid configuration with familiar programming languages, including C++, C#, LabVIEW, Python, Matlab, and Ruby.

Our Autocorrelators at a Glance

A pulseCheck with FROG Option? A Mini? PMT, TPA, or PD Detector? Discover Our Autocorrelator Family.