Frequency-Resolved Optical Gating Pulse Analyzer

The IQFROG measures pulse intensity and phase in both spectral and temporal domains, yielding a complete pulse characterization. With its long delay arm and high resolution spectrometer, it measures chirped pulses up to 50 ps wide, or up to 10 ps wide if the pulse is transform limited. The IQFROG is available in 1.0 and 1.5 micron wavelengths.

The IQFROG 1.0 μm is perfect for seed laser pulses for chirped pulse amplification (CPA) and the IQFROG 1.5 μm is ideal for C-band femtosecond and picosecond pulsed fiber lasers.

IQFROG 1.0 μm

  • 1000 nm – 1100 nm input pulse wavelength range
  • Intensity & phase measurement for pulses 300 fs to 50 ps long
  • Autocorrelation measurement up to 50 ps

IQFROG 1.5 μm

  • 1520 nm – 1610 nm input pulse wavelength range
  • Perfect for C & L band fiber lasers
  • Intensity & phase measurement for pulses 300 fs to 50 ps long
  • Autocorrelation measurement up to 50 ps


High spectral resolution

The FROG measurement technique requires the measurement of second harmonic spectrum of the pulse. The resolution of the spectral measurement often limits the broadest pulse width that a pulse analyzer can measure, most other competitive products can only measure pulses less than 1ps. The IQFROG has a built-in high-resolution spectrometer to enable measurement of transform-limited pulses of up to 10 ps width, or broader if the pulse has a frequency chirp.

Long temporal scan range

The IQFROG uses a long mechanical translation stage to provide up to 200 ps of scan range to allow autocorrelation measurement of up to 50 ps long pulses. It is one of the few pulse analyzers on the market which can measure such broad picosecond pulses, as well as short pulses down to 300 fs width. In comparison the competitive SPIDER technique is limited in the ability to measure pulses broader than 1 ps.

Autocorrelator function

The IQFROG can scan and save autocorrelation traces. Even if the pulse is too broad (with a very narrow spectral width) or is unsuitable for FROG recovery. The IQFROG can be used as an autocorrelator and measure pulses up to 50 ps.

Connectorized input

The connectorized input makes coupling of the beam easy and fast by eliminating the need to align the beam into the unit manually. IQFROG is by far the most easy-to-use optical pulse analyzer on the market.

Full software control

The mechanical control, alignment and tuning is controlled by the software, no more need to align manually.

Product warranty

3yr-WarrantyThis product comes with a 3 year warranty.

Customer testimonial

'We are very happy with the 1.5μm FROG system from Coherent Solutions. In contrast to most commercially available FROG equipment, this system allows analysing ps pulses rather than fs pulses while still being affordable. It is a very reliable, user-friendly, and highly sensitive instrument that gives us detailed information on the pulses’ temporal and phase profiles. Equally as valuable as the FROG system itself is the service provided by the employees of Coherent Solutions. Whenever we have a technical or scientific question, we immediately receive the requested information. In addition, they regularly send us software updates to further increase the performance of the instrument. We really appreciate such a high-quality customer service.'
Nathalie Vermeulen
Vrije Universiteit Brussel
Brussels, Belgium


IQFROG is the best choice on the market for:

  • Erbium doped fibre laser testing
  • Seed laser pulse characterization
  • Compressor design
  • High speed communications link characterization
  • Optimization of dispersion compensation
  • Optoelectronic component characterization
  • Soliton characterization
  • Nonlinear optical property characterization

How it works

FROG (Frequency-Resolved Optical Gating Pulse Analyzer) Schematic DiagramThe FROG – Frequency-Resolved Optical Gating Pulse Analyzer is a spectrally resolved Second Harmonic Generation (SHG) autocorrelator. It can resolve sub-picosecond pulses since it is not limited by the response time of the detector. At each delay position on the autocorrelation, a complete SHG spectrum is measured, recording both the spectral and temporal characteristics of the pulse simultaneously. The two dimensional plot of SHG spectrum as a function of delay is referred to as a `spectrogram’. Once a spectrogram has been measured, a fast mathematical recovery algorithm is used to completely recover all the characteristics of the pulse, including pulse shape, spectrum, chirp and group delay.


User-friendly software

Optical Pulse AnalyzerThe IQFROG comes with dedicated all-in-one software, ‘Optical Pulse Analyzer’ (OPA) which controls, measures and recovers optical pulses using an intuitive user-friendly graphical user interface.

Download Spec Sheet

For technical specifications, please download the IQFROG Spec Sheet.

 IQFROG 1.0 Micron Spec Sheet

 IQFROG 1.5 Micron Spec Sheet



If you would like to find out more about this product, please contact us.


Papers Relating to FROG Measurement Techniques

Negative Kerr Nonlinearity of Graphene as seen via Chirped-Pulse-Pumped Self-Phase Modulation
Nathalie Vermeulen, David Castelló-Lurbe, JinLuo Cheng, Iwona Pasternak, Aleksandra Krajewska, Tymoteusz Ciuk, Wlodek Strupinski, Hugo Thienpont, and Jürgen Van Erps
Oct 16 Phys. Rev. Applied 6, 044006
View paper online

Frequency-Resolved Optical Gating with the use of Second Harmonic Generation
K.W. Delong, R. Trebino, J. Hunter, W.E. White.
Nov ’94 J Opt Soc Am B-Opt Physics, Vol 11, Iss 11, pp 2206-2215

Complete Characterisation of pulse propagation in optical fibres using Frequency-Resolved Optical Gating
L.P. Barry, J.M. Dudley, P.M. Bollond, J.D. Harvey, R. Leonhardt.
Dec ’96 Electron Lett, Vol 32, Iss 25, pp 2339-2340.

Direct measurement of pulse distortion near the zero-dispersion wavelength in optical fiber by Frequency-Resolved Optical Gating
L.P. Barry, J.M. Dudley, P.G. Bollond, J.D. Harvey, R. Leonhardt.
Apr ’97 Optics Lett, Vol 22, Iss 7, pp 457-459.

Simultaneous measurement of optical fibre non-linearity and dispersion using Frequency-Resolved Optical Gating
L.P Barry, J.M. Dudley, P.G. Bollond, J.D. Harvey, R. Leonhardt.
Apr ’97 Electron Lett, Vol 33, Iss 8, pp 707-708.

Optimization of Optical Data Transmitters for 40-Gb/s Lightwave Systems using Frequency-Resolved Optical Gating
L.P. Barry, S. Del burgo, B.C. Thomsen, D.A. Reid, R.T. Watts, J.D. Harvey.
July ’02 Photonics Tech Lett, Vol 14, Iss 7, pp 971-974.

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