Abstract
AbstractCoherent backscattered light produces considerable noise in optical fiber gyroscopes. The noise in serrodyne‐modulated optical‐fiber gyroscopes with a low‐coherence source is studied theoretically for various forms of serrodyne‐modulation functions. The noise in output signals from the lock‐in amplifier is analyzed for the closed‐loop gyroscope. The coherent backscatter‐induced noise against the maximum phase of serrodyne‐modulation is estimated for finite flyback time or exponential ramp. It is found that the ideal serrodyne‐modulation function with the maximum phase of π and without flyback time cancels the noise in the signals of these gyroscopes.
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