Abstract

We propose a numerical simulation method of the hologram-recording process for light-in-flight recording by holography (LIF holography) based on fast Fourier transform (FFT) to improve the efficiency of the simulation. Because it is crucial to consider the difference in the optical-path length between the object and reference light pulses, we modify a point-spread function by considering the optical-path lengths of the object and reference light pulses and whether both pulses interfere with each other in LIF holography. The computational time was shortened by $5.5 \times {10^5}$ times for the $4{,}096 \times 4{,}096$ resolution of the hologram using the proposed method. We evaluate the proposed method by calculating the root mean square error (RMSE) of the reconstructed holographic images. The RMSEs were relatively small considering the effect of speckle noise; these results effectively demonstrate the validity of the proposed method. Moreover, we reconstruct the moving pictures of light pulse propagation from the hologram generated by the proposed method. We compare the simulation and experimental results, and succeed in qualitatively demonstrating the validity of the proposed method.

© 2021 Optical Society of America

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Supplementary Material (2)

NameDescription
Visualization 1       Moving pictures of light pulse propagation reconstructed from the hologram recorded in the experiment. The time interval between the adjacent pictures corresponds to approximately 8.2 fs.
Visualization 2       Moving pictures of light pulse propagation reconstructed from the hologram calculated by the proposed method. The time interval between the adjacent pictures corresponds to approximately 8.2 fs.

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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