Integrated Acoustooptic Device Modules for Optical Information Processing
Abstract
The objectives of this program year are focused on design, fabrication, and testing of wideband guided wave AO Bragg diffraction from surface acoustic waves in Gallium arsenide optical waveguides and conception/ realization of multichannel integrated acousto optics and electrooptics Bragg modulator modules in TIPE microlenses-based lithium niobates and GaAs channel- planar composite waveguides with applications to signal processing and computing. Wideband GaAs waveguide AO Bragg cells that operate in the acoustic frequency range from 300 to 1200 MHz have been realized. This represents realization of GHz GaAs waveguide AO Bragg cells shows that monolithically integrated optic signal processors such as radiofrequency spectrum analyzers may be fabricated in a common GaAs chip. Multichannel single-mode electrooptic cutoff modulator arrays and Bragg diffraction modulator arrays have been successfully realized in GaAs. One of the vital and remaining components toward monolithic (total) integration in GaAs is the waveguide microlens and linear lens array. Fabrication of negative index-change planar waveguide microlenses in both LiNbO3 and GaAs using ion milling. The waveguide lenses that have been fabricated and tested include single lenses and lens arrays of analog Fresnel, chirp grating, and hybrid analog Fresnel chirp grating types. We have obtained near diffraction-limited spot sizes and good efficiencies in such preliminary components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 18, 1988
- Accession Number
- ADA198061
Entities
People
- Chen S. Tsai
Organizations
- University of California, Irvine