Spatio-temporal characterization of laser pulses by spatially resolved spectral interferometry

1. Alonso, Benjamín
2. Sola, Íñigo J.
3. Varela, Óscar
4. Méndez, Cruz
5. Arias, Isabel
6. San Román, Julio
7. Zaïr, Amelle,
8. Roso, Luis

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Abstract

We have implemented a Mach-Zehnder interferometer scheme to characterize the spatio-temporal amplitude and phase of ultrashort laser pulses. We perform spatially resolved spectral interferometry using a homogeneous plane beam as reference that is achieved after spatially filtering a replica of the test beam. We have tested our system and reconstruction algorithm with simulations and experiments. We study the limits of spectral interferometry in our system and, as an example, we reconstruct a linearly tilted beam. This method is expected to be used to characterize pulses with more complex spatio-temporal structure.

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