Fiber gyroscope with phase-modulated single-sideband detection

Phase-modulated single-sideband detection is applied to a fiber gyroscope. The Sagnac phase is linearly transposed into the phase of an electrical low-frequency signal by using an integrated-optic phase modulator, which is driven by a proper modulating waveform. This detection scheme can provide a high dynamic range. The principle and first experimental results are reported.