MS-ROC Autocorrelator

All-rounder to characterize pulse duration of repetitive fs- and ps-pulses

The MS-ROC (Multi-Shot Row Optical AutoCorrelator) enables pulse width measurement using second order scanning autocorrelation. It is based on a Michelson interferometer and second harmonic generation (SHG autocorrelation). Different models allow pulse duration analysis down to 4 fs for ultrashort pulses and 80 ps for long pulses, even for low pulse energies in the pJ and nJ range. High scan speeds of up to 130ps/s are ideal for real-time measurements. Thanks to dual measurement mode, extremely high temporal resolutions of up to 50 attoseconds are also achieved for ROC models with large scan ranges.

Large scan range & High resolution

Large pulse duration measurement range from 5 fs to 80 ps with highest resolution

Easy to use
Less than 2 minutes setup time, Iris aperture integrated

Low energy pulses
down to pJ level

Our history graph show pulse duration changes over time – perfect for unattended long-term measurements

High-resolution combined with large scan ranges

Thanks to its dual-mode (fine- and fast-scan) both high resolution and large pulse duration ranges are achievable with the same instrument.

Capture details at low pulse energies

Even at low pulse energies and average laser powers, MS-ROC delivers detailed and accurate results.

Femto Easy Autocorrelator Overview

Technical Specification

Femto Easy’s ROC multi-shot autocorrelator comes with a range of unique features and configuration options. From femtoseconds to picoseconds. Compare the technical specifications and discover your favorite model.

Pulse duration min10 fs1 - 50 fs20 fs4 fs1 - 20 fs4 fs1 - 20 fs
Pulse duration min40 ps80 ps40 ps80 ps
Fine scan mode rangenot applicablenot applicable4 – 100 fs4 – 100 fs
Accessible spectral range (nm)2480 - 2200480 - 2200480 - 2200480 - 2200
Minimum temporal resolution1 fs2 fsstandard : 1 fs
fine scan : 50 as
standard : 2 fs
fine scan : 50 as
Scan speed> 65 ps/s> 130 ps/sstandard : > 65 ps/s
fine scan : > 400 fs/s
standard : > 130 ps/s
fine scan : > 400 fs/s
Min input pulse energy4
1 MHz | 100 MHz5 pJ | 0.5 pJ5 pJ | 0.5 pJ1 nJ | 100 pJ1 nJ | 100 pJ
Input pulse repetition rate3100 Hz to GHz
Input polarizationlinear vertical
DetectionCMOS 12 Bits, 3 Mpx, 72 dB
PC InterfaceUSB 3.1
Beam height (mm)69 - 148
Dimensions (mm)222 x 194 x 129326 x 194 x 129
1 With few cycle pulse extension option

2 Effective spectral bandwidth to be defined within the accessible spectral range according to customer's requirements.

3 Low repetition rate available as an option.

4 Those values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…)

Optional Features

Additional crystals
The default MS-ROC configuration includes one crystal. To extend the wavelength range of the device, additional plug&play crystals can be ordered and swapped within the system in seconds

Fiber input connector
Plug play collimation module with fiber connector. Can be mounted on the MS-ROC to easily switch the input from free-space to fiber. No alignment required.

Low energy
Internal module to increase the sensitivity of the MS-ROC when the laser power is too weak

Low repetition rate
Synchronization mode to be used when the laser repetition rate is low. Mandatory for 100 Hz and lower, recommended from below 500 Hz

Phase matching
Default MS-ROC configuration works for a given central wavelength. Phase matching allows tuning the SHG crystal to measure different central wavelengths with the best SNR

Few cycle extension
Extension of the minimum pulse duration to the few cycle pulses range. Down to 10 fs for MS-ROC and down to 4 fs for MS-ROC-SP and MS-ROC-SLP


All key data conveniently displayed: The Femto Easy software has been designed to be user friendly and intuitive. The modern software works with touchscreens and runs either under Linux or Windows. It allows distant control of the devices via PC, tablet or smartphone. We can also provide custom software developments upon request.

Femto Easy Autocorrelator in the Lab (here: ROC single-shot model)


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Pulse duration measurement made easy

Our engineers employ the latest technologies and frameworks to create autocorrelator solutions that combine a strong easy-to-use experience with high scientific performance.