Fig. 4: Experimentally generated intensity profile of 4-bit orbital angular momentum (OAM)-coded signal under turbulence-free condition. | Communications Physics

Fig. 4: Experimentally generated intensity profile of 4-bit orbital angular momentum (OAM)-coded signal under turbulence-free condition.

From: Multiplexed orbital angular momentum beams demultiplexing using hybrid optical-electronic convolutional neural network

Fig. 4

OAM modes with topological charge l = −7, −5, 2, and 6 are selected. Each panel (a–p) represents the coded 4-bit string from (0000) to (1111) where the selective OAM modes are active. A grayscale color bar and a scale bar of length 1 mm are drawn.

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