Spatial-Light-Modulator-Based Multichannel Data Transmission by Vortex Beams of Various Orders

• Published in: Sensors (Basel, Switzerland) Vol. 21; no. 9; p. 2988
• Main Authors: Khonina, Svetlana N, Karpeev, Sergey V, Butt, Muhammad A
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 24-04-2021; MDPI
• Subjects: Channels; Communication; Crosstalk; Data transmission; Demultiplexing; Diffractive optical elements; Digital imaging; Electron beams; Fourier transforms; Lasers; Light; multichannel diffractive optical element; multiplexed signal; Optics; Radiation; sorting; Spatial data; Spatial light modulators; Vortex beams; Vortices; multichannel diffractive optical element; data transmission; sorting; demultiplexing; multiplexed signal; Vortex beams; spatial light modulators
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s21092988

We report an atmospheric multichannel data transmission system with channel separation by vortex beams of various orders, including half-integer values. For the demultiplexing of the communication channels, a multichannel diffractive optical element (DOE) is proposed, being matched with the used vortex beams. The considered approach may be realized without digital processing of the output images, but only based on the numbers of informative diffraction orders, similar to sorting. The system is implemented based on two spatial light modulators (SLMs), one of which forms a multiplexed signal on the transmitting side, and the other implements a multichannel DOE for separating the vortex beams on the receiving side. The stability of the communication channel to atmospheric interference and the crosstalk between the channels are investigated.