Neural-network-enabled holographic image reconstruction via amplitude and phase extraction

Rymov D.А., Starikov R.S., Cheremkhin, P.А.

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For Russian citation (Opticheskii Zhurnal):

Рымов Д.А., Стариков Р.С., Черёмхин П.А. Нейросетевая реконструкция сцен с цифровых голограмм на основе извлечения амплитуды и фазы // Оптический журнал. 2022. Т. 89. № 9. С. 11–19. http://doi.org/ 10.17586/1023-5086-2022-89-09-11-19

Rymov D.A., Starikov R.S., Cheremkhin P.A. Neural-network-enabled holographic image reconstruction via amplitude and phase extraction [in Russian] // Opticheskii Zhurnal. 2022. V.89. № 9. P. 11-19. http://doi.org/ 10.17586/1023-5086-2022-89-09-11-19

For citation (Journal of Optical Technology):

D. A. Rymov, R. S. Starikov, and P. A. Cheremkhin, "Neural-network-enabled holographic image reconstruction via amplitude and phase extraction," Journal of Optical Technology. 89(9), 511-516 (2022). https://doi.org/10.1364/JOT.89.000511

Abstract:

Subject of study. We present research on the range of atmospheric optical communications links as a function of atmospheric conditions, the types of laser beam modulation used, and the type of interference-resistant coding used. Aim. We develop an approach for increasing the range of free-space optical communications links by improving resistance to atmospheric turbulence. Methods. We show that the modulation technique and channel coding must be compatible if optimum results are to be achieved. Pulse position modulation and interference-resistant position coding are one example of such a compatible combination; a holographic code in which a sequence of pulses representing a 1D linear hologram of a single pulse replaces a single pulse in the desired position is one example of an interference-resistant code. In this case, position modulation is still being used, but in the form of multiple pulse position modulation. A holographic code takes advantage of the fact that holograms are divisible, and a fragment of the hologram can be used for recovery of transmitted data (as well as data hidden by noise). The recovery capacity of the holographic code depends on the hologram length—the number of slots per symbol interval. Main results. We show that holographic coding provides higher interference resistance and a lower probability of detector error and provides the same benefit as an increase in transmitter power. Practical significance. The benefit from holographic coding may be used to either increase the communications range or increase the communications channel reliability. Position coding has the advantages that the redundant information required for interference-resistant encoding is created within the symbol interval, does not affect the symbol repetition frequency, and has no effect on the data transmission rate.

Keywords:

atmospheric optical communication lines, position-pulse modulation, position noise-resistant coding

Acknowledgements:

the work was carried out with the financial support of the Russian Science Foundation, grant No. 20-79-00291

OCIS codes: 090.1995, 110.4280, 230.5160, 090.1760

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