Internet Of Things (IOT) drives a significant increase in the extent and type of sensing technology and equipment.
Sensors, instrumentation, control electronics, data logging and transmission units comprising such sensing systems will
all require to be powered. Conventionally, electrical powering is supplied by batteries or/and electric power cables. The
power supply by batteries usually has a limited lifetime, while the electric power cables are susceptible to
electromagnetic interference. In fact, the electromagnetic interference is the key issue limiting the power supply in the
strong electromagnetic radiation area and other extreme environments. The novel alternative method of power supply is
power over fiber (PoF) technique. As fibers are used as power supply lines instead, the delivery of the power is
inherently immune to electromagnetic radiation, and avoids cumbersome shielding of power lines. Such a safer power
supply mode would be a promising candidate for applications in IOT. In this work, we built up optically powered active
sensing system, supplying uninterrupted power for the remote active sensors and communication modules. Also, we
proposed a novel maximum power point tracking technique for photovoltaic power convertors. In our system, the actual
output efficiency greater than 40% within 1W laser power. After 1km fiber transmission and opto-electric power
conversion, a stable electric power of 210mW was obtained, which is sufficient for operating an active sensing system.