Femto Easy, ultrafast instrumentation

Products

Autocorrelators

Autocorrelators are used to measure pulse duration. The basic principle is to create two copies of the incoming beam, with a beam splitter. Those copies are superimposed in a nonlinear medium, where they interact generating a third beam. As the overlap of the two copies depends on the pulse duration, analysing the third beam allows to calculate the pulse duration.

We supply different types of autocorrelators :

  • The ROC autocorrelator is a single-shot autocorrelator, thus it needs one single pulse to measure the duration. It is very compact and extremly easy to use. Only two minutes are necessary to get the measurement !
  • The MS-ROC autocorrelator is a multi-shot autocorrelator. It uses an optical delay line to scan the delay, and each pulse allows to know the intensity for a particular delay. It can measure pulses with energy as low as 50 pJ.
  • The BOAR autocorrelator is a single-shot interferometric autocorrelator, based on two photons absorbtion. The same device can measure pulse duration and retrieve the spectrum with a broad spectral range, from 1200 to 2400 nm.

FROG

FROG stands for Frequency-resolved Optical Gating. It is a technique for a complete characterization of ultrashort pulses, thus it can retrieve the full time-dependant electric field, and the equivalent optical spectrum with spectral phase. In other words, FROG allow you to know the duration of your pulses, but also how to deal with spectral phase to reach the shortest possible duration.

We supply two types of FROG :

  • The Fast FROG is a single-shot FROG, thus it needs one single pulse to measure the duration. Its innovative algorithm allow a real-time pulse retrieval.
  • The MS-FROG is a multi-shot FROG. It uses an optical delay line to scan the delay, and each pulse allows to know the intensity for a particular delay. It can measure pulses with energy as low as 50 pJ. The same device can measure very short pulses and longn pulses, from 5 fs to 80 ps !

Imaging spectrometer

A spectrometer allows you to know the spectrum for your laser, i.e. the intensity of each wavelength (or frequency) present in your laser.

Most of spectrometers give an average spectrum, where imaging spectrometer allows you to know the spectrum at different position inside the laser beam. Our MISS spectrometer gives you a two dimensions image, one dimension being the position in one diameter of the beam, the other is the spectrum at this position.

Beam profiler

Beam Profilers are devices that allow the whole optical intensity profile measurement of a laser beam. They retrieve not only the beam diameter and position, but also the full shape of the beam.

We provide two types of BeamPro beam profilers :

  • BeamPro with large sensors, to measure collimated beams.
  • BeamPro with small pixels, to measure focused beams.

Frequency conversion

Frequency converters allows you to generate various wavelengths from your laser source. Different techniques can be used to convert frequencies, for example doubling using a non linear crystal.