Phased-Array Monolithic PEM for FT Spectrometry With Applications in Explosive Detection and CB Defense

Abstract

We present the theory and multiphysics simulation of a novel type of photoelastic modulator (PEM) for use in ultra-high performance FT spectrometers with applications in the optical recognition of explosives and CB warfare agents. This new technology is based on the strain birefringence induced along a bar-shaped optical element by a phased array of piezoelectric transducers (PZT). Appropriate phase and amplitude relationships among the array PZTs ensure that induced birefringence oscillations add constructively and result in high total retardation. When used in PEM/FT spectrometers (Buican, 2006; Buican and Carrieri, 2004, 2006), monolithic virtualstack/ phased-array (VSPA) PEMs (Buican 2008) will provide ultra-high scan rates (to >105 interferograms/s); broad spectral range; high spectral resolution; and high light throughput.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2008
Accession Number
ADA503410

Entities

People

  • Arthur H. Carrieri
  • Tudor N. Buican

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Amplitude
  • Arrays
  • Birefringence
  • Chemical Warfare Agents
  • Detection
  • Detectors
  • Differential Equations
  • Elastic Waves
  • Explosives
  • Modulators
  • Optical Materials
  • Optics
  • Phased Arrays
  • Piezoelectric Transducers
  • Spectrometers
  • Standing Waves
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Critical Infrastructure Protection in CBRN and WMD Threats.
  • Materials Science and Engineering.
  • Optical Physics and Photonics.