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AA-DD. Scanning Real-Time Autocorrelator

● 10 fs - 30 ps input pulse duration
● 450-3200 nm full wavelength range
● 0.1-20 Hz scan rate
● USB connection and Windows software included with all units
● Interferometric autocorrelation trace
● Broadband fiber-coupled input for 450-3200 nm coverage (optional)

    The AA-DD real-time autocorrelator offers smooth and fast measurement of femtosecond and picosecond pulse duration. The autocorrelator can cover several wavelength ranges by using up to 4 interchangeable photodetectors and optics. Two separate ranges can also be covered upon request. Input pulse duration ranges from 10 fs to 30 ps for easy monitoring of different laser systems, especially femtosecond and picosecond oscillators (for low repetition rate amplifier monitoring <10 kHz please also see our ASF single-shot autocorrelator series).

    The device features USB interface and can be easily hooked up to a PC with Windows OS, LabView drivers are also included in the package. The software is supplied with the device and comprises several useful tools. The acquired pulse duration data can be visualized, stored or exported to a .txt or .dat file. Autocorrelation function and final FWHM pulse duration in femtoseconds are calculated and displayed in real-time. Moreover, Gaussian or sech2 fitting options are available, intensity function may also be observed. The statistical viewer feature allows the comparison of data acquired from several separate pulse measurements.

    The tiny body of the AA-DD flawlessly fits any experimental setup with strict space requirements. We also offer an optional fiber input for fast and reliable pulse duration measurement in various optical fibers. Moreover, the autocorrelator in this case still maintains the free-space measurement capability.


Ultrafast Laser Diagnostics, Accessories and Components

  • Femtosecond Oscillator Pulse Duration Measurement

  • Femtosecond Pulse Duration Measurement and Dispersion Characterization

  • Femtosecond and Picosecond Pulse Duration and Near Contrast Measurement

  • Novel Ultrafast Fiber Laser Development

  • Femtosecond and Picosecond OPA Pulse Duration and Near Contrast Measurement




Possible full wavelength range*

450-3200 nm


(exchangeable photodetector/beam

splitter pairs)

V: 450-700 nm

R1: 700-1300 nm

R2: 1300-2000  nm

R3: 1950-3200 nm

Input pulse duration range

20 fs - 6 ps10 fs - 12 ps10 fs - 30 ps

Input pulse repetition rate

>10 kHz

>10 Hz

>10 Hz

Sensitivity (typical)

100 mW2

Input polarization

linear, horizontal (vertical upon request)

Scan rate

0.1-20 Hz

Linear distortion


Collinear autocorrelation

yes (interferometric and intentsity)

PC connection


Required equipment

Windows PC or oscilloscope

Fiber input (optional)

FC/PC or FC/APC (other types on request)

Signal source and detector type

two-photon conductivity in semiconductors

Dimensions, mm

132x129x117 - optical unit

225x190x45 - control uni

148x133x117 - optical unit

225x190x45 - control unit

185x180x145 - optical unit

225x190x45 - control unit

* - the indicated subranges are covered by exchangeable photodetector/beam splitter pairs. I.e. the customer may choose from one subrange of their choice (to cover a desired corresponding wavelength region indicated in the table above) to four sets for complete full wavelength range coverage. Please indicate the required subranges for precise quotation and information when making a request for the product.