Synchronization of the Fast FROG detection to an external signal for accurate laser single pulse extraction up to 36 kHz (125 kHz with the Enhanced detection option)
Single-shot Fast FROG
Single-shot Frequency-resolved Optical Gating
Fast FROG is reliable, compact and based on Second Harmonic Generation. Key design features, such as the wavefront division technique and the use of our mini imaging spectrometer MISS, make the Fast FROG very easy to use and versatile while leading to accurate measurements. Six models are available, covering different pulse duration ranges from sub-5 fs to 10 ps, over a broad spectral range. Two designs are available: one for long pulses mainly relying on transmission optics, and one for ultrashort pulses which is designed to be fully achromatic.
Any repetition rate (single-shot to GHz)
Easy to align and use
Proprietary hot-swap spectrometers
Spatio-spectral measurements
Achromatic and non-dispersive (FC and FS models)
Available documentation
2D / 3D drawings
Scientific papers
Single-stage few-cycle nonlinear compression of milliJoule energy Ti: Sa femtosecond pulses in a multipass cell
Daniault, Louis; Cheng, Zhao; Kaur, Jaismeen; Hergott, Jean-François; Réau, Fabrice; Tcherbakoff, Olivier; Daher, Nour; Délen, Xavier; Hanna, Marc; Lopez-Martens, Rodrigo;
Optics Letters; 2021, Optica Publishing Group
LOA – ENSTA; France
Spatio-temporal pulse cleaning in multi-pass cells
Kaur, Jaismeen; Daniault, Louis; Cheng, Zhao; Tourneur, Oscar; Tcherbakoff, Olivier; Réau, Fabrice; Hergott, Jean-François; Lopez-Martens, Rodrigo;
arXiv preprint arXiv:2302.14222; 2023,
LOA – ENSTA; France
Simultaneous nonlinear spectral broadening and temporal contrast enhancement of ultrashort pulses in a multi-pass cell
Kaur, Jaismeen; Daniault, Louis; Cheng, Zhao; Tourneur, Oscar; Tcherbakoff, Olivier; Réau, Fabrice; Hergott, Jean-François; Lopez-Martens, Rodrigo;
Journal of Physics: Photonics; 2023, IOP Publishing
LOA – ENSTA; France
Few-mode energy-managed soliton fiber laser
Mostafa I. Mohamed, Mincheng Tang, Aurélien Coillet, Vincent Couderc, and Philippe Grelu
Applied Optics; 2025, Optica Publishing Group
ICB; France
Sub-100 fs all-fiber mode-locked laser at high repetition rates for THz spectroscopy
Sourav Das Chowdhury, Jishnu Dey, Debasis Pal, Debashri Ghosh, Nimish Dixit, Aparajita Bandyopadhyay, Amartya Sengupta, and Atasi Pal
Applied Optics; 2025, Optica Publishing Group
CSIR; India
Energy-managed soliton fiber laser
Mostafa I. Mohamed, Aurélien Coillet & Philippe Grelu
Nature communications; 2025, Nature Publishing Group UK London
ICB; France
Femtosecond pulses at 914 nm without mode-locking using Nd-doped fiber amplifiers
Raphaël Florentin, Arnaud Viry, Kilian Le Corre, Thierry Robin, Thierry Georges, Giorgio Santarelli, Hervé Gilles, Sylvain Girard, and Mathieu Laroche
Optics Letters; 2024, Optica Publishing Group
CIMAP; France
Optimum design of NOLM-driven mode-locked fiber lasers
Malfondet, Alix; Parriaux, Alexandre; Krupa, Katarzyna; Millot, Guy; Tchofo-Dinda, Patrice;
Optics Letters; 2021, Optica Publishing Group
Université de Bourgogne; France
Experimental measurements of the transfer function of a nonlinear optical loop mirror
Malfondet, Alix; Parriaux, Alexandre; Tchofo-Dinda, Patrice; Millot, Guy;
JOSA B; 2022, Optica Publishing Group
Université de Bourgogne; France
Generation of sub-half-cycle 10 µm pulses through filamentation at kilohertz repetition rates
Huang, Wei-Hong; Zhao, Yue; Kusama, Shota; Kumaki, Fumitoshi; Luo, Chih-Wei; Fuji, Takao;
Optics Express; 2020, Optica Publishing Group
Toyota Technological Institute; Japan
High non-linearities effects on pulse quality in a CPA system and mitigation strategies
Maurel, Martin; Brown-Dussault, Evelyne; Gagnon, Mathieu; Boudreau, Sylvain; Mailloux, Alain; Gouin, Samuel; Deladurantaye, Pascal; Trépanier, François;
Components and Packaging for Laser Systems IX; 2023, SPIE
Teraxion; Canada
Heteronuclear multicolor soliton compounds induced by convex-concave phase in fiber lasers
Zhang, Heze; Mao, Dong; Du, Yueqing; Zeng, Chao; Sun, Zhipei; Zhao, Jianlin;
Communications Physics; 2023, Nature Publishing Group UK London
Northwestern Polytechnical University; China
Synchronized multi-wavelength soliton fiber laser via intracavity group delay modulation
Mao, Dong; Wang, Huaqiang; Zhang, Heze; Zeng, Chao; Du, Yueqing; He, Zhiwen; Sun, Zhipei; Zhao, Jianlin;
Nature communications; 2021, Nature Publishing Group UK London
Northwestern Polytechnical University; China
Birefringence-induced heterogeneous vector pulses in ultrafast fiber lasers
Mao, Dong; Gao, Qun; Li, Jingyi; He, Zhiwen; Du, Yueqing; Zeng, Chao; Sun, Zhipei; Zhao, Jianlin;
Physical Review Applied; 2022, APS
Northwestern Polytechnical University; China
Research Article Birefringence-Managed Normal-Dispersion Fiber Laser Delivering Energy-Tunable Chirp-Free Solitons
Mao, Dong; He, Zhiwen; Gao, Qun; Zeng, Chao; Yun, Ling; Du, Yueqing; Lu, Hua; Sun, Zhipei; Zhao, Jianlin;
Spectrum; 2022,
Northwestern Polytechnical University; China
Birefringence-managed normal-dispersion fiber laser delivering energy-tunable chirp-free solitons
Mao, Dong; He, Zhiwen; Gao, Qun; Zeng, Chao; Yun, Ling; Du, Yueqing; Lu, Hua; Sun, Zhipei; Zhao, Jianlin;
Ultrafast Science; 2022, AAAS
Northwestern Polytechnical University; China
Oscillating soliton molecules induced by strong vector-mode coupling
Li, Jingyi; Mao, Dong; Gao, Qun; He, Zhiwen; Du, Yueqing; Zeng, Chao; Zhao, Jianlin;
Physical Review A; 2023, APS
Northwestern Polytechnical University; China
In vivo three-and four-photon fluorescence microscopy using a 1.8 µm femtosecond fiber laser system
Murakoshi, Hideji; Ueda, Hiromi H; Goto, Ryuichiro; Hamada, Kosuke; Nagasawa, Yutaro; Fuji, Takao;
Biomedical Optics Express; 2023, Optica Publishing Group
NIPS; Japan
Experimental and numerical demonstration of driver pulse spectral width and phase dependence in near-single-cycle pulse post-compression generation
Hergott, Jean-Francois; Reau, Fabrice; Lepetit, Fabien; Tcherbakoff, Olivier; Sublemontier, Olivier; Chen, Xiaowei; Bussiere, Benoit; Paul, Pierre-Mary; D’oliveira, Pascal; Lopez-Martens, Rodrigo;
Optics Continuum; 2023, Optica Publishing Group
LIDYL – CEA Saclay; France
Near-single-cycle pulses generated through post-compression on FAB1 laser at ATTOLAB-Orme facility
Hergott, Jean-François; Marroux, Hugo JB; Lopez-Martens, Rodrigo; Réau, Fabrice; Lepetit, Fabien; Tcherbakoff, Olivier; Auguste, Thierry; Maeder, Lucie; Chen, Xiaowei; Bussière, Benoit;
EPJ Web of Conferences; 2021, EDP Sciences
LIDYL – CEA Saclay; France
FAB10: a user-oriented bandwidth-tunable extreme ultraviolet lightsource for investigations of femtosecond to attosecond dynamics in gas and condensed phases
Bresteau, D; Spezzani, C; Tcherbakoff, O; Hergott, J-F; Lepetit, F; D’oliveira, P; Salières, P; Géneaux, R; Luttmann, M; Vadillo-Torre, I;
The European Physical Journal Special Topics; 2023, Springer
LIDYL – CEA Saclay; France
Pulse dynamics of passively mode-locked polarization maintaining fiber lasers
Kothalawala, Veenavee Nipunika;
; 2021,
Lappeenranta-Lahti University of Technology; Finland
Agile femtosecond synchronizable laser source from a gated CW laser
Renard, William; Chan, Clément; Dubrouil, Antoine; Lhermite, Jérôme; Santarelli, Giorgio; Royon, Romain;
Laser Physics Letters; 2022, IOP Publishing
IRISIOME; France
51-W average power, 169-fs pulses from an ultrafast non-collinear optical parametric oscillator
Lang, Lukas; Bauer, Carolin P; Phillips, Christopher R; Keller, Ursula;
Optics Express; 2021, Optica Publishing Group
ETH Zürich; Switzerland
Free-running Yb: KYW dual-comb oscillator in a MOPA architecture
Camenzind, Sandro L; Sevim, Tolga; Willenberg, Benjamin; Pupeikis, Justinas; Nussbaum-Lapping, Alexander; Phillips, Christopher R; Keller, Ursula;
Optics Express; 2023, Optica Publishing Group
ETH Zürich; Switzerland
TempoRL: laser pulse temporal shape optimization with Deep Reinforcement Learning
Capuano, Francesco; Peceli, Davorin; Tiboni, Gabriele; Camoriano, Raffaello; Rus, Bedřich;
High-power, High-energy Lasers and Ultrafast Optical Technologies; 2023, SPIE
ELI Beamlines; Czech Republic
Laser pulse duration optimization with numerical methods
Capuano, Francesco; Peceli, Davorin; Tiboni, Gabriele; Špaček, Alexandr; Rus, Bedřic;
arXiv preprint arXiv:2211.13351; 2022, IEEE
ELI; Czech Republic
A 62-fs All-fiber Wideband Flat-top Spectrum Electro-optic Comb via Time-frequency Domain Shaping
He, Siying; Deng, Zejiang; Wang, Siyi; Xiong, Shiping; Zhang, Menglin; Di, Yuanfeng; Liu, Chenyu; Li, Xinyue; Luo, Daping; Gu, Chenglin;
Journal of Lightwave Technology; 2024, IEEE
East China Normal University; China
60 fs, 1030 nm FEL pump–probe laser based on a multi-pass post-compressed Yb: YAG source
Viotti, A-L; Alisauskas, Skirmantas; Bin Wahid, Ammar; Balla, Prannay; Schirmel, Nora; Manschwetus, Bastian; Hartl, Ingmar; Heyl, Christoph M;
Journal of synchrotron radiation; 2021, International Union of Crystallography
DESY; Germany
Vlastnosti laserových zesilovačů ultrakrátkých pulzů
Zbyněk, Hubka;
; 2022, České vysoké učení technické v Praze. Vypočetní a informační centrum.
Czech Technical University; Czech Republic
of Dissertation: Generation and application of supercontinuum for high power
Indra, Lukáš; Indra, Lukáš;
Appl. Phys. Lett; 1976,
Czech Technical University; Czech Republic
Wafer-scale replicated gratings for compressing ultrafast laser pulses at telecom wavelengths
Lütolf, Fabian; Friebel, Florence; Kuznetsov, Ivan; Rudin, Benjamin; Emaury, Florian; Gallinet, Benjamin; Ferrini, Rolando; Basset, Guillaume; Resan, Bojan;
Optics Continuum; 2022, Optica Publishing Group
CSEM; Switzerland
Product reviews
As a customer of Femto Easy, I really appreciate the wavelength flexibility of their FROG systems so that measurements can be performed in different wavelength domains using a single system. Special efforts were made to find the best solution for my needs and to optimize the system’s performance. The FROG software is very advanced and allows a detailed analysis of the measurement data. Finally, I also really value the fast response I receive from Femto Easy customer support in case of questions.
Nathalie Vermeulen
Vrije Universiteit Brussel - Belgium
Professor
A few years ago, I had the privilege of testing the very first FROG prototype that Antoine delivered using his motorcycle at the time. Now, on a different continent, I regularly work with the FROG at 1030 nm. Being in an RD lab, the flexibility to move the measurement device without the inconvenience of extensive realignment is simply fantastic.
We use this equipment regularly, and the amplitude and phase reconstruction occur swiftly and with high precision. The single-shot feature has revolutionized our experiments by enabling us to actively and instantly cancel the residual spectral phase reconstructed by the algorithm, while simultaneously feeding our TPSR (tunable pulse stretcher) in real-time. The Femto Easy team is always there for us, ready to address our inquiries and provide assistance – something we truly appreciate.
Martin Maurel
Teraxion - Canada
Researcher
I’m in charge of an instrumental platform comprising several experimental benches based on multiple femtosecond laser sources (35-200 fs, 400 nm to 2.6 µm wavelength). I therefore purchased two Femto Easy products (a beam profiler and a single-shot FROG) to characterize the beams. Their wavelength flexibility, ease of use and speed are real assets. We regularly use the FROG when building new setups to check the evolution of our pulse widths or to adjust our pre-compensation setups. Those instruments have become essential tools on our platform.
Gwenaëlle Vaudel
IMMM - France
Head of instrumental platform
I am very happy with the Femto Easy FROG device. The ease of use and the software are absolutely great for fast lab work. I was especially successful in a project where our classic autocorrelator was performing badly due to saturation effects at low frequencies and I had no problems whatsoever using this device. My main use is compressor adjustment and the live measurement is great for that as well.
Frederick Börgmann
Edgewave - Germany
Laser Engineer
Our FROG system has been working amazingly ! We found the interface user-friendly and simple to use.
Enrico Ridente
Infleqtion - UK
Laser Engineer
The single-shot FROG is an ideal solution for characterization of kHz Ti:Sapphire amplifier with pulse duration of around 30 fs (achromatic design by using a bimirror). I particularly appreciated the consideration of my specific request on the wavelength range in order to characterize both the pump laser and the OPA signal. If the quality of the software is often highlighted, I also valued the overall finish of the device and its mechanical parts.
Florent Margaillan
NanoSciences Institute of Paris - France
Optical Engineer
The MS-FROG-SP system has been in regular use at CSIR-CGCRI since its installation. It was installed using CSIR in-house developed sub-100 fs fiber laser and the installation went flawlessly, ticking everything on the test report. Presently, the system is delivering excellent performance in sub-100 fs pulse characterization.
Debashri Gosh
CSIR - India
Principal Scientist
With the Femto Easy FROG we went from unboxing to in-depth system learning in less than 1 hour. The system is intuitive to align and operate when compared to other similar systems in our facility.
ASML
ASML - The Netherlands
Senior Researcher
The Femto Easy MS-FROG is a reliable and easy usable tool to characterize our high repetition rate (250 MHz) femtosecond pulses at 1550 nm. The fiber coupling ensures a straightforward measurement and the software allows a fast retrieval of the pulse duration and spectral phase. We mainly use it during our laser production. Also great thanks for the fast and helpful communication and support.
Maximilian Bradler
Menlo Systems - Germany
Technology Manager
We have been using our MS-FROG with great satisfaction. Compared to other FROG systems we’ve worked with, the Femto Easy system demonstrates significantly better contrast and exceptional spectral performance. It has been immensely helpful in accurately characterizing our 2 nm bandwidth ultrafast laser. Based on this, we plan to utilize your system as a reference tool to monitor the long-term pulse shape stability of our laser.
Yeong Gyu Kim
Korea Institute of Machinery and Materials (KIMM) - South Korea
Principal Researcher
I currently have three different FROGs and the Femto Easy Single Shot FROG is the easiest, most reliable FROG to use. Femto Easy has made a stable software release (not compiled LabVIEW homebrew code) that reliably connects to FROG hardware. Femto Easy FROG hardware is quick and easy to align with one adjustment point saving time during setup. The phase retrieval algorithm is reliable providing the same quality as a traditional scanning frog. The FROG trigger option works well with my low rep rate amplifier enabling versatility between my 1 kHz and 10 Hz Ti:sapphire amplifiers.
Maksim Livshits
Los Alamos National Laboratory - USA
Staff Scientist
Femto Easy’s FROGs are the most versatile tools available on the market. For our research purposes, the ability to cover broad bandwidth ranges with both fs and ps duration pulses made them ideal. The Femto Easy team also provides fast support and training on the equipment, which experienced FROG users will understand is crucial. The software produces accurate retrievals even in complex or low signal environments.
Patrick Bowen Montague
NKT Photonics - Denmark
R&D Manager
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:
FROG-Single-shot
| 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 06:28 PM | Goran | 10/02/2026 06:28 PM | Pulse duration min | 4 fs | 10 fs | 20 fs | 50 fs | 70 fs | 100 fs | 200 fs |
| 2 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | Pulse duration max | 150 fs | 250 fs | 500 fs | 1 ps | 3 ps | 5 ps | 10 ps |
| 3 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 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 06:28 PM | Goran | 10/02/2026 06:28 PM | Spectral Window Δλ (nm)1 | 580 | 420 | 420 | 300 | 300 | 300 | 300 |
| 5 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | Input pulse repetition rate | single-shot to GHz2 | single-shot to GHz2 | single-shot to GHz2 | single-shot to GHz2 | single-shot to GHz2 | single-shot to GHz2 | single-shot to GHz2 |
| 6 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | Single-pulse measurement | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) | Up to 125 kHz laser repetition rate (with Enhanced detection and Trigger options, or 18 kHz without) |
| 7 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | Min input pulse energy3 | |||||||
| 8 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | - Single-shot | 250 µJ | 1 µJ | 1 µJ | 1 µJ | 1 µJ | 1 µJ | 1 µJ |
| 9 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | - 1 kHz | 10 µJ | 100 nJ | 100 nJ | 50 nJ | 50 nJ | 50 nJ | 50 nJ |
| 10 | Goran | 10/02/2026 06:28 PM | Goran | 10/02/2026 06:28 PM | - 50 MHz | 20 nJ | 1 nJ | 1 nJ | 200 pJ | 200 pJ | 200 pJ | 200 pJ |
| - | FC | FS10 | FS20 | PS1 | PS3 | PS5 | PS10 |
1 Effective spectral bandwidth to be defined within the accessible spectral range according to customer’s requirements. Additional spectrometers can be provided to address different spectral windows.
2 The measurements are averaged over several pulses for laser with repetition rate higher than 62.5 kHz (with Enhanced detection option)
3 Values give an order of magnitude. The exact sensitivity depends on many parameters (pulse duration, beam profile, wavelength…). Higher sensitivity can be achieved with multi-shot MS-FROG
Optional features
Additional crystals
The default Fast FROG 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
Additional MISS spectrometer
The default Fast FROG configuration includes one imaging spectrometer MISS. To extend the wavelength range of the device, additional plug&play MISS spectrometers can be ordered and swapped within the system in seconds
Enhanced detection
Replacement of the default camera embedded in the Fast FROG by a higher performance one to increase the specifications of the system (better temporal resolution and spectral resolution, single pulse extraction up to 125 kHz)
High dynamic range
Software mode to increase the dynamic range of the Fast FROG signal acquisition from 12 to 16 bits. Not compatible with pure single-shot measurements as 2 images are necessary to build one FROG trace
Low energy
Internal module to increase the sensitivity of the Fast FROG when the laser power is too weak
Phase loop
Software mode to use the Fast FROG to perform spectral phase feedback loop with a pulse shaper (contact use to check pulse shaper compatibility)
Phase matching
Default Fast FROG configuration works for a given central wavelength. Phase matching allows tuning the SHG crystal to measure different central wavelengths with the best SNR
Pulse Front Tilt / Spatial Chirp
Measurement of spatio-temporal couplings in the software. Correction of FROG trace accordingly for better accuracy of the retrieval
Small beam
Internal module to increase the input beam diameter when it is too small for the Fast FROG (necessary for beams typically in the range of few mm or less)
Trigger
Related products
Multi-shot FROG
Multi-shot Frequency-resolved Optical Gating
The MS-FROG expands our FROG series and is preferably used when it comes..
PRODUCT DETAILSFast FROG Retrieval Software
The retrieval of the ultrashort-pulse from the FROG trace image is managed by our easy-to-use FROG software. Fast FROG software comes with an optimized retrieval algorithm. It allows you to retrieve time and spectral information in real-time.
Several algorithms (including the so called Ptychographic Iterative Engine) are combined to enhance the reconstruction speed and quality.
Thanks to speed, the live extraction of shot-to-shot pulse properties is achieved, such as temporal profile intensity and phase, fundamental spectrum and phase, pulse chirp, third-order dispersion, and, of course, pulse duration (FWHM, autocorrelation FWHM, Fourier-limited pulse duration).
Learn more about softwareContact Us to Schedule Live DemoFROG in the Lab
Single-shot FROG made easy
Our engineers employ the latest technologies and frameworks to create FROG solutions that combine a strong easy-to-use experience with high scientific performance.
Spatio-temporal couplings measurements
Thanks to its unique design Fast FROG lets you measure in real time spatio-temporal couplings such as Spatial Chirp and Pulse Front Tilt for an easy optimization of your laser compressor.
