Alignment of receiving and transmitting apertures in wireless laser power transfer systems

Authors

DOI:

https://doi.org/10.30837/rt.2026.1.224.13

Keywords:

laser radiation, focusing, aperture, wireless energy transfer, transfer efficiency, optical system

Abstract

The article investigates the problem of matching the aperture between the transmitting and receiving optical systems in wireless laser power transmission channels. The system efficiency criterion is defined as the ratio of received optical energy to transmitted power. A condition is formulated under which the beam radius in the receiver plane must be equal to or less than the aperture radius, which allows for maximum energy intake.

Models for single-component lens systems and two-component afocal collimator telescopes are considered, and an analysis of the optimal magnification factor of the collimator and its effect on reducing the beam diameter at the receiver is performed. It is shown that the use of afocal systems provides more effective aperture matching at long distances compared to simple lens designs.

Practical limitations of receiver design are discussed. It is emphasized that the presented model is idealized, since it does not take into account atmospheric effects (absorption, scattering, turbulence) that can significantly reduce the efficiency of the system at long distances.

References

Zhang Q., Fang W., Xiong M., Liu Q., Wu J., Xia P. Adaptive Resonant Beam Charging for Intelligent Wireless Power Transfer // IEEE Internet of Things Journal. 2019. Т. 6, № 1. С. 1160–1170. DOI:10.1109/JIOT.2018.2871165.

Raboin J. W., Whiteley M. M., Resor S. L., Perlin G., Murphy P., Slostad J. Optical Power Beaming in the Lunar Environment. arXiv preprint. 2024. arXiv:2405.06002. URL:https://arxiv.org/abs/2405.06002.

Barbeau N. R. Power deposited by a Gaussian beam on a decentered circular aperture // Applied Optics. 1995. Т. 34, № 28. С. 443–6445. DOI: 10.1364/AO.34.006443.

Wang Y., Silva D. A. Encircled-energy analysis of laser-diode beams coupled into circular apertures // Applied Optics. 1991. Т. 30, № 21. С. 2962–2969. DOI: 10.1364/AO.30.002962.

Kaymak Y., Rojas-Cessa R., Feng J., Ansari N., Zhou M., Zhang T. A Survey on Acquisition, Tracking, and Pointing Mechanisms for Mobile Free-Space Optical Communications // IEEE Communications Surveys & Tutorials. 2018. Т. 20, № 2. С. 1104–1123. DOI:10.1109/COMST.2017.2787707.

JPL DESCANSO Monograph Series 7. Deep Space Optical Communications. Pasadena, CA: JPL, 2000. (part 5.1: acquisition, tracking and pointing; методи вирівнювання).

Saleh B. E. A., Teich M. C. Fundamentals of Photonics. 3rd ed. Wiley, 2019. 1392 p.

Andrews L. C., Phillips R. L. Laser Beam Propagation through Random Media. 2nd ed. Bellingham, WA : SPIE Press, 2005. 782 p. DOI: 10.1117/3.626196.

Hemmati H. (ed.) Near-Earth Laser Communications. Boca Raton: CRC Press, 2009. 432 p.

Shmatko O., Kolomiitsev O., Rekova N., Kuchuk N., & Matvieiev, O. Designing and evaluating dl-model for vulnerability detection in smart contracts // Advanced Information Systems. 2023. No7(4). P. 41–51. DOI: 10.20998/2522-9052.2023.4.05

Ho T.-H. Pointing, Acquisition, and Tracking Systems for Free-Space Optical Communication Links. PhD Thesis. University of Maryland, 2007. 220 p. URL:https://drum.lib.umd.edu/

Magnan E., Maslek J., Bracamontes C., Restelli A., Boulier T., Porto J. V. A low-steering piezo-driven mirror // Review of Scientific Instruments. 2018. Т. 89, № 6. 063105. DOI:10.1063/1.5027020.

Park S., Choi J., Cho D. Development of a 9-W wireless optical power transfer for free-space data and power transfer // Optics Express. 2007. Т. 15, № 8. P. 5141–5151. DOI:10.1364/OE.15.005141.

Digital Optical Communications (DSOC) team. Overview of the deep space optical communications (DSOC) technology demonstration // Proc. SPIE. 2025. Vol. 13355. Article 133550J. DOI:10.1117/12.3043966.

Guo Y., Liu Y., Leng Q., et al. High-Efficiency Resonant Beam Charging and Communication. arXiv preprint. 2021. arXiv:2107.14458. URL:https://arxiv.org/abs/2107.14458

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Published

2026-04-30

How to Cite

Sokirkaiev, D., & Zarudny, A. (2026). Alignment of receiving and transmitting apertures in wireless laser power transfer systems. Radiotekhnika, (224), 131–139. https://doi.org/10.30837/rt.2026.1.224.13

Issue

No. 224 (2026): Radiotekhnika

Section

Articles

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