The Carpe is the first commercial autocorrelator to measure the pulse width of fs lasers at the output of laser microscopes, complementing the APE Autocorrelators  suite. The power of the laser at the position of the sample can be measured as well with the power detector in the detector head.

The Carpe can measure the pulse width at both the sample position and the microscope input port. This enables to examine the influence of the microscope optics on ultrafast pulses and to optimize the pulses at the relevant position. The Carpe works with high NA objectives and immersion objectives. Due to the thickness of the detector cover, the minimum distance required between the focal point of the objective and the housing of the objective (working distance) is 0.5 mm. To use objectives with a working distance below 0.5 mm, a short working distance option, operating with a different detector principle, is available.

The compact instrument is simply inserted into the beam between laser and microscope. It does not require any changes in the setup and it does not interfere with the measuring beam.

• Short working distance option