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Our Long Scan Autocorrelator kits are simple, flexible and cost effective solutions for measuring the pulse width of various ultrafast lasers. The standard kits cover input wavelengths between 700-2000 nm with the purchase of a BBO crystal (Newport part number 90015087) not included in the kit. The input wavelength range can also be extended down to 480 nm by purchasing a second BBO crystal (Newport part number 90015088) not included in the kit. The kit includes a Newport 1936-R Optical Power Meter and 918D Low-Power Detector to provide data acquisition. A high resolution automated translation stage with 25 mm of travel corresponds to a total time delay of greater than 160 ps with 25 fs resolution. This makes it a valuable tool for investigating sidebands and satellites of laser pulses which may contain significant amounts of the total pulse energy and interfere with complex time-domain signals associated with pump-probe experiments.
An autocorrelator is a versatile, easy-to-use diagnostic tool for measuring the pulse shape and duration of ultrafast laser pulses. Autocorrelators are capable of measuring pulse widths from both high repetition rate (MHz) oscillators and low repetition rate (kHz) amplifiers in the visible and IR wavelength range. When phase information of the pulse is not required, autocorrelation is the simplest and most affordable method for determining pulse width
There are several commercially available autocorrelators on the market such as the Spectra-Physics PulseScout2™. They are usually designed to measure pulses from a few femtoseconds to several picoseconds in duration. Very often, however, there is a need in research labs to combine the capabilities of measuring very short pulses in the range of tens of femtoseconds with the capability of measuring long pulses on the order of tens of picoseconds with femtosecond resolutions. A typical example is the stretching of a femtosecond pulse to many picoseconds for experiments where large bandwidths are required or chirped pulse amplification. More than just measuring ultrashort pulses, autocorrelators can be used to detect signals in time regions relatively inaccessible by most detectors.
The software included with this product is for reference only. It has been tested in the experimental setup described in our Long Scan Autocorrelator application note. The software will need to be customized by the user for additional experimental requirements. At the present time, Newport provides limited support for this software and any concern should be discussed with Newport before purchasing the product.
All of the components included in this kit have been tested in combination with Spectra-Physics Ultrafast Ti:Sapphire oscillators, amplifiers and optical parametric devices by the Scientists in Newport's Technology and Applications Center. In contrast to commercially available autocorrelators, the Newport long scan autocorrelator kit is suitable for beam diameters up to 10 mm. The dynamic range of the detection system allows contrast measurements up to 7000:1. The kit also includes reference software that can be customized for user's application. Please contact us about special versions of the kit with longer delay (up to ± 160 ps) and/or longer wavelength range if needed.
Applications for the long scan autocorrelator include:
Please see our Long Scan Autocorrelator application note for more information.
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