A bi-directional free-space optical communication system with MEMS spatial light modulator for aglie data link

We report a free space optical (FSO) communication system for bi-directional passive optical network (PON) based on a MEMS spatial light modulator (SLM). A piezoelectric PZT scanner is used to display a marker image to invite a passive optical terminal (POT) and to keep the optical link even when the POT moves. Unlike wireless network that broadcasts radio signals, the FSO system in this work provides high security data transmission.