ABSTRACT
This chapter details the main parameters of acoustic waves in glass rods and the different types of acoustic modes that are of interest for the acousto-optic interaction. It describes the main parameters of acoustic waves in glass rods and the different types of acoustic modes that are of interest for the acousto-optic interaction. The chapter provides the reader with the knowledge on the two possible configurations used in acousto-optic fiber-based modulators and their operation employing piezoelectric elements. It presents a description of the acousto-optic interaction in fibers, which leads to the coupling of modes in the optical waveguide. The chapter explores the interaction of acoustic waves with Bragg grating and long-period grating inscribed in optical fibers. It describes the use of photonic crystal fibers in acousto-optic devices and discusses the development of a fiber-based viscometer whose operating principle relies on the acousto-optic mechanism.
