Transverse structure of femtosecond laser filaments reconstructed with circular scanning-based photoacoustic tomography

Qingwei Zeng; Lele Cai; Lei Liu

doi:10.1117/12.3006485

18 December 2023 Transverse structure of femtosecond laser filaments reconstructed with circular scanning-based photoacoustic tomography

Qingwei Zeng, Lele Cai, Lei Liu

Author Affiliations +

Proceedings Volume 12963, AOPC 2023: Optical Sensing, Imaging, and Display Technology and Applications; and Biomedical Optics; 129630I (2023) https://doi.org/10.1117/12.3006485
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

Filament refers to a plasma channel with high laser intensity and high plasma density formed by propagation of intense femtosecond laser pulses in transparent medium. Direct experimental measurement of a filament is often impossible due to the extremely high speed of the process (~ps) and sizes of studied objects (~μm). In this paper, a novel medical imaging method named photoacoustic tomography (PAT) is used to reconstruct the cross-sectional image of multiple filamentation of femtosecond laser pulses in air. An open toolbox named k-Wave is used to simulate the acoustic signal generated by optical filament with different energy deposition density. The conventional delay-and-sum (CDAS) algorithm is used to reconstruct the initial pressure distribution of the multifilaments. This study verifies the feasibility of using photoacoustic tomography to reconstruct femtosecond multifilament images, which can provide theoretical support for the practical application of optical filament in atmosphere.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Qingwei Zeng, Lele Cai, and Lei Liu "Transverse structure of femtosecond laser filaments reconstructed with circular scanning-based photoacoustic tomography", Proc. SPIE 12963, AOPC 2023: Optical Sensing, Imaging, and Display Technology and Applications; and Biomedical Optics, 129630I (18 December 2023); https://doi.org/10.1117/12.3006485

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KEYWORDS

Image restoration

Acquisition tracking and pointing

Photoacoustic tomography

Femtosecond phenomena

Reconstruction algorithms

Acoustics

Image processing

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