Analysis of a Single-mode Optical Fibre Piezoceramic Phase Modulator

The behaviour of a cylindrical single-mode optical fibre piezoceramic phase modulator was investigated in the frequency range below resonance. The integral and differential phase modulation efficiencies are reported for different geometrical dimensions of the modulator and for various piezoelectric ceramic materials. The results obtained show that a phase-modulation depth in excess of 180deg can be easily achieved using commercially available piezoelectric cylinders, with driving voltage amplitude as low as 5 V.