High-resolution optical fiber accelerometer

A novel high-resolution optical fiber accelerometer is developed, featuring compact-size, low-cost and easy to be mass produced. The accelerometer probe has an all-fiber structure. Phase-generated carrier (PGC) technology is adopted to modulate and demodulate the interference signals to obtain a high-resolution phase signal. Measurement of prototype shows the high-resolution optical fiber accelerometer can resolve an acceleration up to 3×10-4 g in 0-100 g dynamic range and the maximum resolution reaches 10-6. The probe consists of a circular mesh flexture and silicon micro-mirror, capable of generating the displacement interference signal under acceleration. Strain analysis of the structure by Cosmosworks and experimental measurement is carried out. The result of the overall design agrees reasonably well with experimental measurement.