The sensor has a fiberoptic Sagnac interferometer (1) comprising a photodetector device (5), and an evaluation circuit (9) comprising a multifunctional integrated optical chip (MIOC) (11) with MIOC transfer function. The chip is arranged upstream of a digi...

Two light beams are modulated by a phase modulator provided in fiber coil (1). An analog-to-digital converter (2) is arranged to convert analog phase shift signal of light beam detected by photodetector into digital output signal. An adder (5) is arranged ...