Dual closed-loop detection scheme for differential FOG driven by dual sources

An all digital dual closed-loop detection scheme for the differential fiber optic gyros driven by dual sources (DS-DFOG) is proposed and demonstrated experimentally. A DS-DFOG prototype is developed and the stable scale factor is achieved. The temperature experiment results show that the drift introduced by rapid temperature changes has almost been suppressed, and its bias instability is reduced by more than an order of magnitude compared to the single equivalent FOGs.