Figure 2 | Scientific Reports

Figure 2

From: Optical communication beyond orbital angular momentum

Figure 2

Schematic of our Multiplexing and Demultiplexing setup.

(a) Intensity profiles of modes generated from combinations of p = {0, 1, 2, 3, 4} and . (b) Experimental setup: Three components of a multiline Ion-Argon laser, λ1 = 457 nm, λ2 = 488 nm and λ3 = 514 nm, are separated using a grating and sent to a Spatial Light Modulator (SLM-1). (c) The SLM is split into three independent screens and addressed with holograms to produce the set of modes shown in (a). The information is propagated through free space and reconstructed in the second stage with a modal filter. (d) The modal filter consists of a superposition of all holograms encoded in SLM-2. (e) Each mode is identified in the far field using a CCD camera and a lens.

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