Spatially-dependent group delay dispersion from a diffraction grating and its application to the single-shot d-scan technique

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 4f 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 group delay dispersion. Leveraging this effect, we propose a novel 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.

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Publication Details

Published
2025-08-18
DOI
https://doi.org/10.1364/opticaopen.29919626.v1
Primary Topic
Photoacoustic and Ultrasonic Imaging
Type
article
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article

Spatially-dependent group delay dispersion from a diffraction grating and its application to the single-shot d-scan technique

Helder Crespo, Miguel Canhota, María L. Cerón Loayza, Anne‐Lise Viotti et al.
2 links
Photoacoustic and Ultrasonic Imaging
article

Spatially-dependent group delay dispersion from a diffraction grating and its application to the single-shot d-scan technique

Helder Crespo, Miguel Canhota, María L. Cerón Loayza, Anne‐Lise Viotti, Cord L. Arnold, Íñigo J. Sola, Benjamín Alonso, Chen Guo, Rosa Romero, Ivan Sytcevich, Miguel Miranda, Daniel Diaz Rivas, Cristian Barbero, Saga Westerberg, Gaspard Beaufort
article en

Abstract

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 4f 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 group delay dispersion. Leveraging this effect, we propose a novel 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.

Lunds Universitet, Vetenskapsrådet, Ministerio de Ciencia e Innovación, Junta de Castilla y León, European Regional Development Fund, European Social Fund, HORIZON EUROPE European Innovation Council
Openalex Percentile: Top 80%
Photoacoustic and Ultrasonic Imaging
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Spatially-dependent group delay dispersion from a diffraction grating and its application to the single-shot d-scan technique — Helder Crespo, Miguel Canhota, et al. · (2025) | TGRS Research Map | TGRS