A.Fibres 1 Bias modulation 1 Fiber optics 1 Fibers 1 Fibre optics gyroscopes 1 Gyroscopes 1 Harmonic analysis 1 Modulation methods 1 Multiple harmonics 1 Phase noise 1 Phase-noise Relative intensity noise 1 Signal to noise ratio 1 Sinusoidal bias modulation 1 Thermal phase 1 Thermal-phase noise 1 article 1 fiber optics 1 fiber-optic gyroscope 1 multiple harmonics 1 noise 1 random walk 1 relative-intensity noise 1 signal noise ratio 1 sinusoidal bias modulation 1 spike 1 thermal-phase noise 1