Research of auto control about biasvoltage of high speed and power electro-optic modulator

It is adopted auto control about bias voltage of Electro-optical modulator (EOM) to innovate the traditional manner that gives a constant voltage to the Electro-optical modulator. It takes an advantage that it makes EOM could have good effect in different temperature to acclimate all kinds of environment, because it always works at the half point of the zone of linearity. It uses photoelectric detector and error analysis to authenticate the drift of half-wave voltage of EOM. The PID algorithm is adopted to enhance a high precision auto control for the bias voltage of EOM system. At the end, the EOM with the auto control is experimented at high speed.