Photonics Research, Volume. 10, Issue 4, 922(2022)
Bulk lateral shearing interferometry for spatiotemporal study of time-varying ultrashort optical vortices
Fig. 1. General scheme of the proposed technique for a 2D measurement introducing the walk-off in the (a)
Fig. 2. Scheme of the experimental set-up. (a) Configuration to generate a single optical vortex with an OAM of
Fig. 3. Amplitude swing measurement for the optical vortex of the proof of concept at position
Fig. 4. (a) Retrieved spatiospectral intensity and (b) phase at 798 nm of the same optical vortex using the algorithm 2D4Quad and measuring the spatial spectrum of the ordinary beam with two walk-off crystals: (a1), (b1) BBO and (a2), (b2) calcite. Note that the retrievals are shown spatially interpolated with a spatial step of 10 μm.
Fig. 5. Azimuthal phase comparison for a 600-μm-radius ring for each walk-off crystal (BBO and calcite) and the theoretical azimuthal phase (Theo.).
Fig. 6. Amplitude swing measurement for the two delayed optical vortices at position
Fig. 7. (a) Retrieved spatiotemporal intensity and (b) phase of the average pulse for three different times using the 2D2Quad approach: (a1), (b1)
Fig. 8. (a) Simulated spatiotemporal intensity and (b) phase of the combination of two ultrashort optical vortices with different OAMs (
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Miguel López-Ripa, Íñigo J. Sola, Benjamín Alonso, "Bulk lateral shearing interferometry for spatiotemporal study of time-varying ultrashort optical vortices," Photonics Res. 10, 922 (2022)
Category: Ultrafast Optics
Received: Nov. 11, 2021
Accepted: Feb. 3, 2022
Published Online: Mar. 11, 2022
The Author Email: Miguel López-Ripa (miguellr@usal.es)