Contribution to a conference proceedings/Contribution to a book

PUBDB-2026-00373

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single-Shot electro-optic detection of broadband THz at EuXFEL and FLASH using diversity scheme with advanced reconstruction algorithms

Demazeux, Q.Extern* ; Szwaj, C.Extern* ; Roussel, E.Extern* ; Steffen, B.DESY* ; Czwalinna, M.-K.DESY* ; Bielawski, S.Extern*

2025
IEEE

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Please use a persistent id in citations: doi:10.1109/IRMMW-THz61557.2025.11319759

Abstract: We present novels methods aiming at recording THz waveforms in single-shot and high repetition rates, with high temporal resolution. This work is performed in the PhLAM-DESY collaboration framework, aiming at developing real-time diagnostics for THz sources, as well as monitoring the shapes of relativistic electron bunches in accelerators. While electro-optic probing with chirped laser probes is efficient for high repetition rate operations, it suffers from resolution and fidelity limitations, particularly for extended recording windows. To address these issues, we explore solutions based on the diversity concept, employing a multi-output electro-optic measurement system. This approach, combined with advanced reconstruction algorithms, enables faithful retrieval of the measured electric field. We have developed a new algorithm that "adapts" to laser chirp imperfections (high-order dispersion), enabling high-resolution single-shot broadband THz measurements over a long temporal window. We present the method's principle, numerical results, and the status of experimental developments at European XFEL and FLASH, demonstrating a significant advancement in high-resolution, long-duration of broadband THz characterization.

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Contributing Institute(s):

1. Strahlkontrollen (MSK)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Facility (machine) FLASH
2. Experiments at XFEL

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