Fast and reliable femtosecond pulse duration measurement
The ROC (Row Optical Autocorrelator) is a compact and robust single-shot autocorrelator designed for fast and reliable femtosecond pulse duration measurements. Its inline optical design enables straightforward alignment without routine calibration or complex adjustments, making pulse characterization quick and easy. With a compact footprint, high measurement accuracy and multiple configurations covering different wavelength and pulse duration ranges, ROC is equally suited to R&D laboratories and industrial laser systems.
Alignment in seconds
From single-shot to GHz repetition rates
Compact and robust design
No routine calibration required
Spatially resolved measurements

Available documentation
2D / 3D drawings
ROC - Format A
ROC - Format B
ROC - Format C
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
Autocorrelator reviews
Specifications
ROC-Models
| wdt_ID | wdt_created_by | wdt_created_at | wdt_last_edited_by | wdt_last_edited_at | FC | FS10 | FS20 | PS1 | PS3 | PS5 | PS10 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Goran | 10/02/2026 06:35 PM | Mathieu | 19/02/2026 12:49 PM | Pulse duration min | 5 fs | 10 fs | 20 fs | 50 fs | 70 fs | 100 fs | 200 fs |
| 2 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | Pulse duration max | 150 fs | 250 fs | 500 fs | 1 ps | 3 ps | 5 ps | 10 ps |
| 3 | Goran | 10/02/2026 06:35 PM | Mathieu | 19/02/2026 12:48 PM | Accessible spectral range (nm)1 | 480 - 2100 | 480 - 2100 | 480 - 2100 | 480 - 2100 | 480 - 2100 | 480 - 2100 | 800 - 2100 |
| 4 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | Dimensions (mm) | 55 x 56 x 233 (Format A) | 55 x 56 x 265 (Format B) | 55 x 56 x 233 (Format A) | 55 x 56 x 195 (Format C) | 55 x 56 x 195 (Format C) | 55 x 56 x 195 (Format C) | 55 x 56 x 195 (Format C) |
| 5 | Goran | 10/02/2026 06:35 PM | Mathieu | 19/02/2026 12:49 PM | Input pulse repetition rate2 | Single-shot to GHz | Single-shot to GHz | Single-shot to GHz | Single-shot to GHz | Single-shot to GHz | Single-shot to GHz | Single-shot to GHz |
| 6 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | Single-pulse measurement | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) | up to 125 kHz laser repetition rate (with Trigger and Enhanced Detection options, or 18 kHz without) |
| 7 | Goran | 10/02/2026 06:35 PM | Mathieu | 19/02/2026 12:49 PM | Min input pulse energy3 | Single-shot : 1 µJ at 30 fs 40 MHz : 500 pJ at 30 fs | Single-shot : 1 µJ at 30 fs 40 MHz : 500 pJ at 30 fs | Single-shot : 1 µJ at 30 fs 40 MHz : 500 pJ at 30 fs | Single-shot : 1 µJ at 300 fs 40 MHz : 300 pJ at 300 fs | Single-shot : 1 µJ at 300 fs 40 MHz : 300 pJ at 300 fs | Single-shot : 1 µJ at 300 fs 40 MHz : 300 pJ at 300 fs | Single-shot : 1 µJ at 300 fs 40 MHz : 300 pJ at 300 fs |
| 8 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | Input polarization | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) | linear horizontal (vertical if mounted on the side) |
| 9 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 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 | CMOS 12 Bits - 3 Mpx - 72 dB | CMOS 12 Bits - 3 Mpx - 72 dB |
| 10 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | PC Interface | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 | USB 3.1 |
| 11 | Goran | 10/02/2026 06:35 PM | Goran | 10/02/2026 06:35 PM | Beam height (mm) | Adjustable from 30 mm | Adjustable from 30 mm | Adjustable from 30 mm | Adjustable from 30 mm | Adjustable from 30 mm | Adjustable from 30 mm | Adjustable from 30 mm |
1 Effective spectral bandwidth to be defined within the accessible spectral range according to customer’s requirements
2 The measurements are averaged over several pulses for laser with repetition rate higher than 62.5 kHz (with Enhanced Detection option). Custom versions available on request. For lower power and wider pulse duration ranges, Multi-Shot scanning versions are available (MS-ROC).
3 Those values give an order of magnitude for a 1030 nm laser. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…)
Optional features
Phase matching
The standard ROC configuration is optimized for a specific central wavelength. The phase-matching option enables adjustment of the SHG crystal to accommodate different central wavelengths while maintaining optimal signal-to-noise ratio (SNR).
Trigger
Synchronizes ROC detection with an external signal for accurate single-pulse extraction up to 36 kHz, or up to 125 kHz when combined with the Enhanced Detection option.
Integrated attenuation
An internal ND filter wheel provides built-in attenuation for measuring low-repetition-rate, high-energy laser sources in the mJ range.
High dynamic range
Software mode that increases the dynamic range of ROC signal acquisition from 12 to 16 bits. This mode is not compatible with true single-shot measurements, as two images are required to generate one autocorrelation trace.
Enhanced detection
Upgrades the standard ROC camera to a higher-performance detector, providing improved temporal resolution and single-pulse extraction up to 125 kHz when combined with the Trigger option.
Related products
µ-ROC Single-Shot Autocorrelator
The world’s smallest autocorrelator
Ultrafast pulse measurement in an ultra-compact format
The µ-ROC is an ultra-compact single-shot autocorrelator designed..

MS-ROC Multi-Shot Autocorrelator
Versatile pulse duration measurement from 3 fs to 80 ps
The MS-ROC (Multi-Shot Row Optical Autocorrelator) is a scanning autocorrelator..

Software

Femto Easy software provides an intuitive interface for easy access to measurement data and device controls. Compatible with both Windows and Linux, it features a touchscreen-friendly interface and enables remote operation of Femto Easy devices from a PC, tablet or smartphone. Custom software developments are also available upon request.
Learn more about softwareContact Us to Schedule Live DemoVideos
Single-Shot Autocorrelator in the Lab
Our engineers employ the latest technologies and frameworks to create autocorrelator solutions that combine a strong easy-to-use experience with high scientific performance.






















