Optical Hidden Layer Networks

Abstract

An optical implementation of what is known as a 'supervised learning' algorithm was implemented with volume photorefractive holographic medium and a spatial light modulator. We investigated how one could apply neural network principles to temporal information using photorefractive media. For this purpose, the transfer function and impulse response of photorefractive two-beam coupling amplifiers was derived and experimentally verified. As part of the investigation on temporal processing of information, we built and demonstrated a fiber optic acoustic transducer for audio sound processing. The sound spectra generated by the transducer were stored in a volume holographic medium. The stored sounds were used to recognize identical or similar sounds in real time.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1991
Accession Number
ADA246162

Entities

People

  • Dana Z. Anderson

Organizations

  • University of Colorado Boulder

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Signals
  • Computer Programs
  • Computers
  • Electro-Optic Modulators
  • Elements
  • Materials
  • Military Research
  • Modulators
  • Neural Networks
  • Optical Fibers
  • Optical Modulators
  • Photorefractive Materials
  • Piezoceramics
  • Resonant Frequency
  • Signal Processing
  • Transducers
  • Transfer Functions

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Neural Network Machine Learning.
  • Optical Physics and Photonics.

Technology Areas

  • AI & ML