MS-ROC Autocorrelator multi-shot
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
Easy to align and use
Low energy pulses down to pJ level
Wavelength versatile
Available documentation
2D / 3D drawings
Scientific papers
Logical rotation of non-separable states via uniformly self-assembled chiral superstructures
Zhang, Yi-Heng; Liu, Si-Jia; Chen, Peng; Zhu, Dong; Chen, Wen; Ge, Shi-Jun; Wang, Yu; Zhang, Zhi-Feng; Lu, Yan-Qing;
Nature Communications; 2024, Nature Publishing Group UK London
Nanjing University; China
A 4-GHz actively driven ultra-low phase noise mode-locked fibre laser
Abdulkadir Yentur, Mehmet Ziya Keskin, and Ibrahim Ozdur
Electronics Letters; 2024, Wiley
TOBB University of Economics and Technology; Turkey
Optimization of 1.03 μm femtosecond pulse laser tripling efficiency based on temporal walk-off compensation
Yang, Li; Ji, Lailin; Liu, Dong; Rao, Daxing; Zhang, Tianxiong; Shan, Chong; Shi, Haitao; Zhao, Xiaohui; Cui, Yong; Gao, Yanqi;
Optics Communications; 2023, Elsevier
USST; China
Etude comparée de l'émission d'électrons de nanopointes de tungstène et de diamant: émission de champ et photoémission induite par laser femtoseconde
Torresin, Olivier;
; 2019, Université Paul Sabatier-Toulouse III
LCAR; France
Product reviews
Among the autocorrelators we’ve used, MS‑ROC stands out. Setup was effortless and it delivered precise measurements right away. Femto Easy’s support is also top‑tier.
Yuki Ashida
SCREEN - Japan
Optical Engineer
ROC autocorrelator is quite accurate with much more data points and better fitting. And it is also quite easy to use.
Huang Zhou
Advanced Attosecond Laser Infrastructure, CAS - China
Professor
We use the ROC single-shot autocorrelator and the BeamPro laser beam profiler from Femto Easy. Those systems are robust and easy to use, hence perfect for a laboratory use with multiple users.
Laurent Gallais
Institut Fresnel - France
Professor
Menhir Photonics AG acquired a versatile Femto Easy multi-shot autocorrelator MS-ROC some time ago. This tool has been essential for accurate pulse duration measurements for multiple R&D projects. This version of the MS-ROC covers pulse durations from 50 fs to 40 ps. It is perfect for our high repetition rate, low pulse energy lasers.
Karolis Balskus
Menhir Photonics - Switzerland
Senior Laser Engineer
Thanks to the ease of use of the single-shot ROC Autocorrelator and the BeamPro Laser Beam Profiler, our approach of beam characterization changed dramatically. Given the speed with which reliable results can be obtained and the robustness of the devices, we now use our two Femto Easy instruments for the monitoring of several machines. Technicians can be trained on those devices within an hour thanks to the comprehensive, but non-daunting, manuals. The STAR software is excellent on its own right, and the API makes it simple to integrate Femto Easy devices in our interface.
Valentin Maffeis
HEF Groupe - France
Laser process R&D Engineer
The BeamPro and MS-ROC Autocorrelator are well equipped to characterize the fs laser for our research lab. The BeamPro provides good quality images and great tracking for beam stability. The MS-ROC has a clear design and is easy to align and measure the pulse width of the beam. The information is saved in convenient formats for further analysis. The STAR software has a clean and customizable interface, yet is packed with features. We appreciate how Femto Easy has implemented our suggestions for improving the software. We look forward to using this equipment for characterizing and monitoring our broad range output OPA and SHG beamlines as we build and use our pump-probe laser system for photoemission orbital cinematography.
Eric Fackelman
FZ Jülich - Germany
Researcher
The Radio and Optical Communications Lab at DCU acquired the MS-ROC autocorrelator to characterize optical frequency combs from 10 to 100 GHz for applications ranging from data center interconnects to THz generation. Its alignment-free operation achieved through a fibre coupled input to the autocorrelator significantly reduces the time to take our measurements compared to older autocorrelators.
Liam Barry
Dublin City University - Ireland
Professor
The femtosecond pulse duration measurement solution from Femto Easy (ROC autocorrelator) is easy to use, fast and reliable. The STAR software also establishes a new standard in terms of user friendliness and ease of use.
Pierre Deslandes
Helix Surgical - France
CTO, VP and Founder
Our new ROC autocorrelator has proven to be an excellent investment. I appreciate its user-friendly design, from the simple setup process to the intuitive software interface. Plus, its compact size is a definite bonus.
Patrik Grychtol
European XFEL - Germany
Researcher
The Femto Easy µ-ROC autocorrelator is a very compact and user-friendly device. It is easy to align and its compact size allows us to measure femtosecond pulses outside the laboratory where no optical table is available.
Senior Expert - Laser & Optics
Confidential Medical Company
Senior Expert
After working with conventional, bulky, and hard-to-operate autocorrelators, I was really impressed by how quick and easy it was to set up and use the µ-ROC. During maintenance and field service of complex ultrafast laser systems—especially on a tight schedule—such a compact and convenient autocorrelator is a must!
Algirdas Petrašiūnas
Tokyo Instruments - Japan
Service Engineer
The µ-ROC autocorrelator works like a charm! Very good experience, adjustment and full measurement of femtosecond pulses from Ekspla FemtoLux30 laser in just a few minutes – it was really femto easy …
Rokas Danilevičius
Ekspla - Lithuania
Chief Technical Officer
Spark Lasers develops and manufactures high-performance ultrafast lasers, renowned for their excellent pulse temporal quality. One of the keys to achieving this excellence lies in the metrology of our laser sources. To meet our demanding pulse quality goals, we extensively rely on Femto Easy technology. We utilize several systems (Fast FROGs, ROC autocorrelators) in both our R&D and Production departments. Their robustness, ease of use, and performance are instrumental to our daily operations.
Pascal Dupriez
Spark Lasers - France
CEO
Specifications:
MS-ROC-Models
| wdt_ID | wdt_created_by | wdt_created_at | wdt_last_edited_by | wdt_last_edited_at | - | MS-ROC | MS-ROC LP | MS-ROC SP | MS-ROC SLP | MS-ROC USP |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Pulse duration min | 50 fs | 50 fs | 15 fs | 15 fs | 3 fs |
| 2 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Pulse duration max | 40 ps | 80 ps | 40 ps | 80 ps | 40 ps |
| 3 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Accessible spectral range (nm)1 | 480 - 2150 | 480 - 2150 | 480 - 2150 | 480 - 2150 | 480 - 2150 |
| 4 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Minimum temporal resolution | 1 fs | 1 fs | 0.25 fs | 0.5 fs | 0.25 fs |
| 5 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Maximum scan speed | 39 ps/s | 78 ps/s | 39 ps/s | 78 ps/s | 39 ps/s |
| 6 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Min input pulse energy2 | |||||
| 7 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | 1 MHz | 100 MHz | 5 pJ | 0.5 pJ | 5 pJ | 0.5 pJ | 1 nJ | 100 pJ | 1 nJ | 100 pJ | 1 nJ | 100 pJ |
| 8 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Input pulse repetition rate | 100 Hz to GHz 3 | 100 Hz to GHz 3 | 100 Hz to GHz 3 | 100 Hz to GHz 3 | 100 Hz to GHz 3 |
| 9 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Input polarization | linear vertical | linear vertical | linear vertical | linear vertical | linear vertical |
| 10 | Goran | 10/02/2026 06:40 PM | Goran | 10/02/2026 06:40 PM | Detection | CMOS 12 Bits, 3 Mpx, 72 dB | CMOS 12 Bits, 3 Mpx, 72 dB | CMOS 12 Bits, 3 Mpx, 72 dB | CMOS 12 Bits, 3 Mpx, 72 dB | CMOS 12 Bits, 3 Mpx, 72 dB |
| - | MS-ROC | MS-ROC LP | MS-ROC SP | MS-ROC SLP | MS-ROC USP |
1 Effective spectral bandwidth to be defined within the accessible spectral range according to customer’s requirements.
2 Those values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…)
3 Low repetition rate available as an option.
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 repetition rate
Synchronization mode to be used when the laser repetition rate is low. Recommended from below 200 kHz
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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.
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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.
