mediaposted on 12.01.2021, 17:29 by yongjin wang
A wireless light communication is established using two III-nitride diodes, which share identical MQW structures and separately function as a transmitter and a receiver. The generated audio signals are encoded to the emitted light of the transmitter through a bias-tee circuit and then, we shine the receiver using the modulated light. When the receiver is biased at zero voltage, it converts optical signals into electrical ones. An amplifier circuit is applied and the audio signals are decoded. When a forward voltage 2.4 V is applied to the receiver, it operates under the simultaneous emission-detection mode. First, the driven signals are filtered out and then, the output signals are amplified via the amplifier circuit to recover the audio signals.