Fast parallel beam propagation method based on multi-core and many-core architectures

• Published in: Optik (Stuttgart) Vol. 180; pp. 484 - 491
• Main Authors: Shaaban, Adel, Sayed, M., Hameed, Mohamed Farhat O., Saleh, Hassan I., Gomaa, L.R., Du, Yi-Chun, Obayya, S.S.A.
• Format: Journal Article
• Language: English
• Published: Elsevier GmbH 01.02.2019
• Subjects: Beam propagation method; Compute unified device architecture (CUDA); Graphical processing unit (GPU); Open multiprocessors (OpenMP); Parallel computing; Beam propagation method; Parallel computing; Compute unified device architecture (CUDA); Open multiprocessors (OpenMP); Graphical processing unit (GPU)
• ISSN: 0030-4026; 1618-1336
• DOI: 10.1016/j.ijleo.2018.11.111

In this paper, a fast technique is suggested to accelerate the computation of the fast Fourier transform beam propagation method (FFT-BPM). The FFT-BPM is executed on a graphical processing unit (GPU) and multi-core processor GPUs to speed up the computation of huge number of propagation steps with a higher speed than the traditional CPU. Further, the suggested technique is implemented in parallel approach which is faster than serial implementation. The achieved speedup factor is 150× and 5× using GPU and eight cores multiprocessor, respectively with respect to a single core processing time of 215 steps input Gaussian beam. In order to verify the speed of the proposed technique, the possibility of using the BPM to compute the time-consuming Goos–Hänchen shift calculation is proposed. Further, the propagation of a single mode light beam in fiber optic for 5 × 106 steps is executed using GPU. It is found that the speed up of the studied mode is equal to 168x over a single core calculation.