Phase Modulation of the Light Wave Propagating in an Optical Fiber by Acoustic Waves

The optical fiber acoustooptic phase modulator offers the advantages of small size, light weight and low diffraction and optical coupling loss. In this paper, we present the fabrication process and results of our proposed device. A ZnO thin-film bulk acoustic wave transducer was fabricated on a glass substrate which was then bonded on the optical fiber. We experimentally obtained an amplitude-modulated lightwave signal with an input of 9 V at 94 MHz with our measurement system.