IR GRENOUILLES

Introduction to Ultra Short Pulse Measurement Technology:

The autocorrelation instrument, invented in the 1860s, has not undergone significant changes until now. It can only roughly measure the width of ultra short laser pulses and cannot measure pulse phase or even temporal and spatial distortions. Autocorrelated instruments have complex structures, are difficult to install, and require frequency stabilization. If we want to eliminate the interference of spatiotemporal distortions such as spatial chirp and pulse front tilt that accompany ultrafast pulses, the structure of the autocorrelation instrument will be more complex.

The newly developed GRENUILLE can easily measure various optical pulse indicators. In addition, the GRENUILLE structure is simple and compact, suitable for measuring various indicators of ultra short pulses. This product has won the R&D 100 Award and the Top 25 Best Inventions Award from Photonics Spectra.

Introduction to Swamp Optics Company in the United States

Swamp Optics, founded in 2001, provides technologically advanced FROG equipment specifically designed for measuring ultra short laser pulses. FROG equipment is rigorous, precise, easy to operate, and has excellent performance. It is currently the most powerful and reliable device for measuring ultra short pulses, capable of measuring changes in pulse intensity and phase over time.

Professor Rick Trebino is the founder of Swamp Optics, an expert in the field of ultrafast laser measurement, and the chairman of the Ultrafast Physics Research Alliance at Georgia Institute of Technology in the United States. Meanwhile, Professor Trebino is also one of the inventors of Frequency Resolved Optical Switching (FROG) technology, widely recognized and honored in the field of ultrafast laser pulse measurement. He has been awarded the prestigious SPIE Egerton Prize for his contributions in the field of ultrafast laser pulses.

Swamp Optics' IR GRENUILLES are used to measure laser pulses in the 900-1100 nm and 1220-1620 nm wavelength bands. As an FROG device, IR GRENUILLE can measure the relationship between pulse intensity and phase over time, as well as the spectrum and phase, with high accuracy and repeatability, without making any assumptions about the pulse or its shape. Moreover, IR GRENUILLE can also be used to measure beam intensity distribution.

Meanwhile, IR GRENUILLE can measure temporal spatial distortion, pulse front tilt, and spatial chirp. Model 10-100-USB can also test the spatial distribution of light beams. With the help of IR GRENUILLE, a large amount of information can be obtained with minimal effort. A GRENUILLE can measure pulses from multiple laser sources, ranging from the lowest power oscillator to the highest intensity amplifier.

The standard input method is free space input (available for all models), but 15-40-USB and 15-100-USB can also be configured as fiber coupled inputs with just a few replacement accessories. Weighing only about 1kg, it has a small volume, light weight, and compact structure. Combined with FROG software, real-time measurement can be performed.

The spectral phase coherent direct electric field reconstruction method is a system composed of mechanical, optical, and user-friendly software. This device is used to measure phase spectrum, spectral intensity, and temporal intensity. It also has an autocorrelation function.

Technical Specifications:

Additional explanation:

The quality of the incident beam mode should be good (but single transverse mode is not required); GRENUILLE's spatial contour measurement helps ensure this.
Obtain feedback on measurement quality by comparing compensation and measurement trajectories.
Simply connect to the USB port of the computer; No power supply required.
For all models, both free running mode and single pulse triggering are standard modes.
By adjusting the crystal axis, the absolute wavelength can be precise to nm.
GRENUILLE is a type of second harmonic generation (SHG) FROG, so there is uncertainty in the time direction, but it can be easily removed. On the other hand, autocorrelation instruments have many uncertainties that cannot be removed.