Fig. 5: Block diagram of the system. | Light: Science & Applications

Fig. 5: Block diagram of the system.

From: Organic photovoltaics for simultaneous energy harvesting and high-speed MIMO optical wireless communications

Fig. 5

A digital signal is generated by a computer and sent to an arbitrary waveform generator (AWG) for digital-to-analogue conversion. The analogue signal is combined with a direct current (DC) bias using a bias tee. Depending on the experiment format, one, two, or four laser diodes (LDs), mounted in lens tubes with an adjustable focal length, are used to transmit the optical signals. One large lens is used at the receiver to focus the light beams on the required number of OPV cells. The receiver circuit is used to extract the signal and harvest the DC power. Details of the receiver circuit are provided in Supplementary Information. An oscilloscope (OSC) is used to convert the analogue signal to a digital signal and send it to a computer for processing. More details of the setup are provided in the Materials and methods section.

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