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Rapid and economical data acquisition in ultrafast frequency-resolved spectroscopy using choppers and a microcontroller.
Published Web Location
https://www.osapublishing.org/oe/abstract.cfm?uri=oe-24-16-18126No data is associated with this publication.
Abstract
Spectrometers and cameras are used in ultrafast spectroscopy to achieve high resolution in both time and frequency domains. Frequency-resolved signals from the camera pixels cannot be processed by common lock-in amplifiers, which have only a limited number of input channels. Here we demonstrate a rapid and economical method that achieves the function of a lock-in amplifier using mechanical choppers and a programmable microcontroller. We demonstrate the method's effectiveness by performing a frequency-resolved pump-probe measurement on the dye Nile Blue in solution.
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