Signal processing improvement of passive resonant fiber optic gyroscope using a reciprocal modulation-demodulation technique
Hanzhao Li, Yi Lin, Lu Liu, Huilian Ma, Zhonghe Jin
Abstract
A resonant fiber optic gyroscope (RFOG) based on the reciprocal phase modulation-demodulation technique is proposed and demonstrated. The residual amplitude modulation induced error of the phase modulator, and the effect of laser frequency noise are all suppressed thanks to the reciprocity of the proposed signal processing scheme. Compared with the past separate modulation-demodulation RFOG, the angular random walk is improved by a factor of 15 times from 0.08°/√h to 0.0052°/√h, and the bias stability is improved from 0.3°/h to 0.06°/h.
Topics & Concepts
DemodulationOpticsPhase modulationFibre optic gyroscopeModulation (music)Sagnac effectFrequency modulationGyroscopePhysicsAmplitude modulationPhase noiseSIGNAL (programming language)Ring laser gyroscopeOptical fiberLaserTelecommunicationsAcousticsComputer scienceRadio frequencyChannel (broadcasting)Quantum mechanicsProgramming languageAdvanced Fiber Optic SensorsPhotonic and Optical DevicesAdvanced Fiber Laser Technologies