Fig. 1. (a) Schematic of the DMD-based optical switch using Gaussian beams. The inset picture shows the image of the Gaussian beam profile. (b) The schematic of the DMD-based optical switch using Bessel beams in the turbulent atmosphere. The inset picture shows the image of the Bessel beam profile.

Fig. 2. Center displacements of the Gaussian and Bessel beams in turbulent atmospheres. (a) The light spot wander of the Bessel beam at 60°C. (b) The light spot wander of the Bessel beam at 80°C. (c) The light spot wander of the Gaussian beam at 60°C. (d) The light spot wander of the Gaussian beam at 80°C.

Fig. 3. Gaussian fitting curves of the distributions of the beam centers.

Fig. 4. Optical switching communication system for the BER measurements. (a) The transmitter of the optical switch communication system. (b1) The schematic diagram of the DMD-based optical switch using Gaussian beams. (b2) The schematic diagram of the DMD-based optical switch using Bessel beams. (c) The receiver of the optical switch communication system.

Fig. 5. BER curve of Gaussian and Bessel beams at the temperatures of 60°C and 80°C. The 25°C Gaussian is measured at the temperature of 25°C from the Gaussian beam as a comparison. G1, G2, and G3 refer to the BERs measured three times from the Gaussian beams. B1, B2, and B3 refer to the BERs measured three times from the Bessel beams.