Deposition of oriented zinc oxide on an optical fiber

Abstract
Techniques are described by which an oriented zinc oxide film is sputtered directly on one side of an 80‐μm‐diam fused silica single‐mode optical fiber. A 4‐GHz piezoelectric transducer incorporating this film demonstrates that the film is oriented. Evidence of acoustic waves in the fiber is given by the swept‐frequency vector input impedance of the transducer.Acoustic transducersfabricated directly on a fiber produce fields focused on the fiber core for efficient acousto‐optic interactions, making possible many new fiber‐optic signal processing devices.

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