2025/11/03 by Daniel Diaz Rivas, Cristian Barbero, Chen Guo +12 · 1 voice
Engineering · Physics and Astronomy · #Laser-Matter Interactions and Applications #Nonlinear Optical Materials Studies #Photorefractive and Nonlinear Optics
paper · doi:10.1364/optica.572768
openalex created_date 2025/11/03 · openalex publication_date 2025/11/03 · openalex updated_date 2026/07/11
Diffraction gratings are among the most fundamental optical elements. They are essential in ultrafast optics for manipulating the spectral phase of coherent ultrashort light pulses in grating stretchers, compressors, and 4 f pulse shapers. In this work, we have exploited an effect associated with diffraction from a single grating, which can produce large amounts of spatially dependent GDD. Leveraging this effect, we propose a single-shot dispersion-scan technique, enabling the characterization of longer pulse durations than previously possible, with arbitrary chirp. We demonstrate this method by measuring 170 fs pulses from a commercial ytterbium-based laser system, both before and after post-compression in a multi-pass cell.