Reduced-Complexity Receiver for Free-Space Optical Communication over Orbital Angular Momentum Partial-Pattern Modes

Table 1

Exact and approximate radii of modes.

	R1				R2
Mode number ()	1	3	6	14	1	3	6	14
Approximate inner and outer radii constituting more than 98% of a mode’s power (meter) (R1 = 0.2w, R2 = 2w)	0.005	0.01	0.01	0.02	0.05	0.08	0.1	0.17
Exact inner and outer radii constitute 98% of a mode’s power (meter)	0.005	0.01	0.023	0.04	0.039	0.02	0.059	0.08