Journal
OSA CONTINUUM
Volume 4, Issue 7, Pages 2044-2051Publisher
OPTICAL SOC AMER
DOI: 10.1364/OSAC.430432
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Funding
- Horizon 2020 Framework Programme [871072, 694596, 871124]
- Laboratoire d'excellence Physique Atomes Lumiere Matiere [ANR-10-LABX-0039-PALM]
- Commissariat a l'Energie Atomique et aux Energies Alternatives
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Utilizing a birefringent delay line for spatially-resolved Fourier transform spectroscopy, combined with the INSIGHT technique, enables the determination of the three-dimensional laser field. This technique allows for the simultaneous measurement of two low-order spatio-temporal couplings, improving accuracy and stability in spatio-spectral characterization.
We utilize a birefringent delay line to perform spatially-resolved Fourier transform spectroscopy at multiple planes around the focus of an ultrashort laser pulse. Combining these measurements at multiple planes with phase-retrieval, i.e. the INSIGHT technique, allows for the determination of the three-dimensional laser field, in both amplitude and phase, lacking only the knowledge of a spatially-uniform spectral phase. We use the device to simultaneously measure two low-order spatio-temporal couplings resulting from a misaligned chromatic lens doublet. Besides being a new implementation of spatio-spectral characterization of ultrashort pulses, this technique allows for more accuracy and stability in spatio-spectral characterization and a push to shorter wavelengths, and may ultimately enable sparse measurements. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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