Application of a digital micromirror device in diffractive optical neural networks: space-time characteristics and limitations

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Abstract

Digital micromirror devices are widely used for optical processing of graphic information, including for the purpose of building holographic display systems and adaptive formation of light beams. Modulators are also used in the creation of diffraction neuron-like systems. The demand for modulators of this type is due to the unique combination of high switching speed and high spatial resolution for optical systems. This paper presents the results of an experimental study of the HDSLM54D67 digital micromirror device (UPO Labs, China), which, according to the manufacturer, has advanced characteristics for its type. The true values of its spatial and velocity parameters are estimated by displaying binary computer-synthesized Fourier holograms and two-dimensional distributions in the form of geometric primitives. The results revealed an abnormal modulation of the left half of the micromirror matrix, leading to a parasitic doubling of the images reconstructed from the holograms. The analysis of the causes of these distortions was carried out, and their connection with the features of the modulator control unit was revealed. The limitations of the applicability of this digital micromirror device model are determined in accordance with the identifi ed spatial limitations (using only the half of the micromirror matrix with a resolution of 1358×1600 pixels) and proposals for optimal integration of the modulator into an optical system are formulated. The use of a modulator is possible, but theoretically the maximum bandwidth will be reduced by 2 times. The results of the study can be used in further optical experiments with this digital micromirror device, including for the task of constructing a diffraction neural network.

About the authors

A. S. Ovchinnikov

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: pik.nik19@mail.ru
ORCID iD: 0009-0001-3678-5722

A. A. Volkov

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: mr.a.a.volkov@gmail.com
ORCID iD: 0009-0008-4213-9373

A. V. Shifrina

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: avshifrina@gmail.com
ORCID iD: 0000-0001-7816-5989

E. K. Petrova

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: EKPetrova@mephi.ru
ORCID iD: 0000-0002-6764-7664

V. A. Nebavskiy

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: nozaler@mail.ru
ORCID iD: 0000-0003-3515-5822

R. S. Starikov

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)

Email: rstarikov@mail.ru
ORCID iD: 0000-0002-7369-1565

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