Femtosecond Laser System for Research on High-Speed Optical Transmultiplexing and Coding.

Abstract

We have been investigating optical thresholders capable of distinguishing between properly decoded pulses and lower intensity, improperly decoded multiaccess interface. We are performing ultrashort pulse optical thresholding experiments at 1.5 microns using GaAs waveguides. Thresholding occurs because the number of carriers generated by two photon absorption is expected to vary inversely with pulse width for fixed pulse energy. Therefore, a short intense pulse will generate more carriers than a longer, less intense pulse. Our new contributions are (1) demonstration of proper scaling with pulse width in the femtosecond to picosecond regime and (2) demonstration of subnanosecond electrical response.

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Document Details

Document Type
Technical Report
Publication Date
Aug 31, 1996
Accession Number
ADA323290

Entities

People

  • Andrew M. Weiner

Organizations

  • Purdue University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Code Division Multiple Access
  • Conversion
  • Demonstrations
  • Electronics
  • Femtosecond Lasers
  • Femtosecond Time
  • Intensity
  • Laser Pulses
  • Lasers
  • Light (Electromagnetic Radiation)
  • Optical Detectors
  • Optics
  • Quantum Electronics
  • Quantum Wells
  • Radiation
  • Two Photon Absorption

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Radio communications and signal processing.

Technology Areas

  • Directed Energy