Mini PD


NIST Traceable Calibration

Laboratories and manufacturers are often faced with systematically establishing an unbroken chain of calibrations to specified references. All APE autocorrelator models are calibrated to a traceable standard in accordance with NIST (U.S. National Institute of Standards and Technology) measurement traceability specifications. A printed and signed calibration certificate is provided with each pulseCheck.

Different Models for Different Wavelengths

The Mini PD is available in a selection of models, each of which covers a different wavelength range, and is ideal for routine tasks where a change in Optics Sets is not necessary.

Compact Design

With its compact footprint of only 160 x 220 x 155 mm, the Mini PD is perfect for working environments where space is limited. When it is needed elsewhere, simply place this portable unit in the lightweight aluminum case provided, for easy and safe transportation to the next site.

Switching Between Collinear and Non-Collinear Mode

The Mini PD supports quick and easy switching between collinear and non-collinear measurement modes. While collinear mode provides pulse width measurement with additional qualitative information about the chirp, non-collinear mode gives background-free autocorrelation with a high dynamic range.


  • Available in various models, each covering a different wavelength range
  • Compact design for minimum space requirements and maximum portability
  • Switching between interferometric and intensity autocorrelation
  • Ultra-precise delay resolution
  • Software-aided phase matching
  • Gaussian, Sech2, and Lorentzian fitting routines
  • Including software and USB interface
  • TCP/IP with standardized command set for easy programming
  • NIST traceable calibration
  • Aluminium carrying case

Mini PD Specification 
* Measured sensitivity including Optics Set, defined as average power times peak power of the incident pulses P(AV) * P(peak) 
Measurable Pulse Width Range 50 fs ... 3.5 ps; Optional: down to 10 fs
Wavelength Range VIS 1  420 ... 550 nm; VIS 2  540 ... 750 nm;
  NIR  700 ... 1200 nm; IR  1100 ... 1800 nm
Optics Sets  Not exchangeable
Delay Resolution < 0.001 % of scan range
Delay Linearity < 1 %
Sensitivity* Typically 0.1 W2
Recommended Repetition Rate > 300 Hz
Type of Measurement Mode Non-collinear intensity, collinear interferometric
Mode Switching Yes
SHG Tuning for Phase Matching Software aided
Trigger Mode 300 Hz ... 50 kHz
Input Polarization Linear horizontal, vertical available as option
Max Input Power 1 W (e.g. oscillator with a rep. rate of approx. 70 MHz) or 10 ?J (e.g. ampli?ed system with rep. rates in the kHz range), whichever results in lower value
Input Aperture 6 mm (free-space)
Input Beam Coupling Free-space; Optional: fiber coupling FC/PC, FC/APC, SMA
Beam Input Height 86 ... 150 mm; Optional 50 mm
Software Included; Real-time display of pulse width and central wavelength, different fitting routines
Fitting Routine Gaussian, Sech2, Lorentz
Connection USB
Remote Control Possible via TCP/IP (SCPI command set)
Calibration NIST traceable calibration certificate included