Acousto-optic modulation of a wavelength-scale waveguide

Underwater Wireless Acousto-Optic Waveguide (UWAOW)

The present study originated in the lack of research into achieving underwater total internal reflection (TIR) via the acousto-optic effect. The uniqueness of this technique exists in the fact that it is based on a high sound pressure level which induces a localised change in refractive index of seawater sufficient to achieve total internal reflection within the communication channel. Different...

Acousto - Optic Isolator ( Aoi )

Electromagnetic Characteristics of Transverse Acousto-Optic Waveguide Device in Integrated Optics

Among several optical devices in integrated optics, the fundamental characteristics of collinear optical switching devices have been studied about optical dielectric waveguides. Conventional waveguidetype acousto-optic (A-O) devices use collinear and longitudinal interactions with mode coupling based on the Bragg condition between optical waves and surface acoustic waves (SAW). Collinear A-O de...

A Very Compact, High Speed and Rugged Acousto-Optic Tunable Filter for Wavelength Division Demultiplexing in Fiber Optic Communication Networks

A Guide to Acousto-Optic Modulators

Sound waves travelling through a crystal can be modelled as crests of increased refractive index alternating with troughs of decreased refractive index. Light incident on gradients in refractive index is scattered, therefore the light scatters from the acoustic wavefronts. In an AOM the light scattered from successive wavefronts interferes constructively. Figure 1 shows two rays of light imping...