Characterization of an LCD for Use as a Programmable Phase Shifter to Produce a Single-Lobed Far-Field Pattern in a Phased Array

Abstract

The liquid crystal display (LCD) from an inexpensive pocket television was converted to a spatial light modulator (SLM) for the purpose of altering the phase front of a ten element diode laser array to produce a single lobe far field pattern. Characterization of the SLM determined the amount of phase shift, amplitude modulation and polarization rotation properties. Nonuniformities within the phase shifter and insufficient phase shift prevented the formation of a single lobe. However, a very limited phase grating was created and analyzed. LCDs from inexpensive commercial pocket televisions were found unsuitable for use as phase shifting spatial light modulators. Semiconductor Lasers, Liquid Crystal Display Systems, Infrared Lasers, Laser Applications

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1993
Accession Number
ADA273883

Entities

People

  • Gregory S. Kenyon

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplitude Modulation
  • Amplitude Modulators
  • Electric Fields
  • Far Field
  • Laser Applications
  • Laser Diodes
  • Lasers
  • Liquid Crystal Displays
  • Mach Zehnder Interferometers
  • Modulation
  • Modulators
  • Optical Modulators
  • Phase Modulation
  • Refractive Index
  • Semiconductors
  • Test And Evaluation
  • Video Signals

Fields of Study

  • Physics

Readers

  • Nuclear Civil Defense.
  • Optical Physics and Photonics.

Technology Areas

  • Directed Energy
  • Microelectronics