Fig. 4: Bidirectional MIR communication system using two identical GFs.
From: Bidirectional mid-infrared communications between two identical macroscopic graphene fibres
a Block diagram of the prototype of the bidirectional MIR communication system. Receiving and transmitting sides of the system can write/read MIR data into the system by encoding/decoding transmitting messages into binary codes. b The dependence of current transfer ratio (CTR) of GF on the increasing input current, Iin at various working distance (0.3–3 cm). The dependence of output current, Iout, on the increasing of F applied to the GF emitter (c), and on the selection of filters (d) the GF–GF communication system. e Downstream and upstream transmissions. Details of signal processing are present in the Methods section. In IR images, “E” refers to the GF emitter and “R” refers to the GF receiver. f The electric signals of E are stably digitized in the system. Electrically driven GF transmits a signal of binary code “1”, and GF in the dormant state represents a signal of “0.” g The communication currents per input electrical field, I*, of state-of-the-art MIR sensors in bidirectional MIR communications. h MIR communication between two GFs reaches 100 KHz without the interference of signal processing modules.
