Acta Optica Sinica, Volume. 44, Issue 12, 1201011(2024)
Numerical Study on Photoacoustic Tomography Reconstruction of Two-Dimensional Transverse Image of Femtosecond Laser Filaments
Figures & Tables(7)
Fig. 1. Simulation model setup of ring array PAT system. (a) Schematic diagram of ring array detection; (b) schematic diagram of division of transducer surface detection unit
Fig. 2. Photoacoustic simulation results of femtosecond laser filament. (a) Initial cross-sectional energy deposition distribution of single filament; (b) acoustic pressure signals recorded at different positions; (c) frequency spectrum of acoustic pressure signals; (d) initial cross-sectional energy deposition distribution of multiple filaments; (e) acoustic pressure signals recorded at different positions; (f) frequency spectrum of acoustic pressure signals
Fig. 3. Reconstructed cross-sectional energy deposition distribution of single filament when centers of filament are located at different positions on x-axis. (a) x0=0 mm; (b) x0=1.0 mm; (c) x0=2.0 mm
Fig. 4. Influence of different transducer related factors on reconstruction of energy deposition distribution of single filament. (a) Scanning radius Dr; (b) number of transducers N; (c) center frequency fc; (d) transducer bandwidth W; (e) transducer diameter L; (f) transducer surface sensitivity σ
Fig. 5. Reconstructed cross-sectional energy deposition distribution of multiple filaments when centers of filaments are located at different positions on x-axis. (a) x0=0 mm; (b) x0=1.0 mm; (c) x0=2.0 mm
Fig. 6. Influence of different transducer related factors on reconstruction of energy deposition distribution of multiple filaments. (a) Scanning radius Dr; (b) number of transducers N; (c) center frequency fc; (d) transducer bandwidth W; (e) transducer diameter L; (f) transducer surface sensitivity σ
Table 1. Changes in tangential resolution of reconstructed image under different parameters
View tableTable 1. Changes in tangential resolution of reconstructed image under different parameters
Factor Symbol Value FWHM /μm Other parameter Scanning radius 5 mm 98.2 N=64，L=3 mm，fc=2 MHz，W=70%，σ=1.0 mm Dr 8 mm 102.9 10 mm 103.6 Number of transducers 32 97.4 Dr=5 mm，L=3 mm，fc=2 MHz，W=70%，σ=1.0 mm N 64 98.2 128 98.6 Transducer diameter 2 mm 100.6 Dr=5 mm，N=64，fc=2 MHz，W=70%，σ=1.0 mm L 4 mm 98.4 6 mm 98.7 Center frequency 1 MHz 170.2 Dr=5 mm，N=64，L=3 mm，W=70%，σ=1.0 mm fc 2 MHz 98.2 3 MHz 83.4 Transducer bandwidth 60% 107.0 Dr=5 mm，N=64，L=3 mm，fc=2 MHz，σ=1.0 mm W 70% 98.2 80% 96.4 Transducer surface sensitivity 0.5 mm 96.5 Dr=5 mm，N=64，L=3 mm，fc=2 MHz，W=70% σ 1.5 mm 98.5 3.0 mm 98.4
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Qingwei Zeng, Lei Liu, Shuai Hu, Shulei Li, Shijun Zhao. Numerical Study on Photoacoustic Tomography Reconstruction of Two-Dimensional Transverse Image of Femtosecond Laser Filaments[J]. Acta Optica Sinica, 2024, 44(12): 1201011
Paper Information
Category: Atmospheric Optics and Oceanic Optics
Received: Aug. 7, 2023
Accepted: Oct. 27, 2023
Published Online: Mar. 7, 2024
The Author Email: Liu Lei (liulei17c@nudt.edu.cn)
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