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HL: Fachverband Halbleiterphysik

HL 33: Poster II

HL 33.39: Poster

Wednesday, March 29, 2023, 17:00–19:00, P1

Application of low-cost visible light LEDs in avalanche mode as sensitive photoreceivers in a plastic optical fiber data transmission system — •Heinz-Christoph Neitzert — Dept. of Industrial Engineering (DIIN) Salerno University Fisciano, Italy

Commercial low-cost light emitting diodes have been tested as photoreceivers without and with applied reverse bias voltage. In particular the possibility to operate the devices in the breakdown regime as sensitive avalanche photodiodes has been succesfully tested. High photogain amplification at relatively low breakdown voltage values has been observed. Based on this possibility to operate the LEDs efficiently not only as emitters but also as photoreceivers, a simple half-duplex bidirectional optical transmission scheme, which is based on the plastic-optical-fiber (POF) as transmission medium and green LEDs as receiving/emitting elements has been developed. The choice of the green wavelength range gives the possibility to operate the system at the minimum absorption of the plastic optical fiber