A Photo-Luminescence Modulator with Improved Linearity for Solar Cell-Based Optical Communications

Leon-Salas W.D.; Malaga M.P.; Vizcardo M. · Proceedings - IEEE International Symposium on Circuits and Systems (2025) · DOI: 10.1109/iscas56072.2025.11043758

Resumen

A circuit for solar cell photo-luminescence modulation is presented. The circuit comprises a MOSFET, an opamp and a resistor forming a feedback loop that sets the current through the solar cell proportional to a modulating input voltage. The proposed modulator circuit achieves higher linearity than other photo-luminescence modulators making it suitable for direct amplitude modulation. A proof-of-concept prototype to demonstrate an optical link with a GaAs solar cell resulting in a bit error rate of 2.74×10-3 using 6-ary pulse amplitude at a speed of 64.62 kbps.

Instituciones: Universidad Nacional de San Agustín de Arequipa