Evaluation of a Potential Wave Division Multiplexer (WDM) for Use in the IRSTD

Abstract

The design of a Wave Division Multiplexer (WDM) was evaluated. This design could be used in the AN/SAR-8 infrared search and target designation system currently being developed by the Navy. The design featured a spherical grating with a radius of curvature of 115mm to test the capability of multiplexing 180 channels. The grating was able to couple light from laser diodes at four different wavelengths (780.0nm, 789.0nm, 848.0nm and 849.0nm). The most significant factor in coupling efficiency was astigmatism. This decreased the demultiplexing coupling efficiency by a factor of 500. The source linewidths were measured to assess the possibility of wavelength slicing. The capability to multiplex 180 channels is possible but cannot yet be achieved due to the lack of light sources that cover the wavelength range required for a 180 channel system. Keywords: Wave division multiplexing; Fiber optics.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1989
Accession Number
ADA223945

Entities

People

  • Paul T. Fernan

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Couplings
  • Curvature
  • Data Transmission
  • Detectors
  • Diffraction
  • Electronics
  • Fiber Optics
  • Geometry
  • Laser Diodes
  • Lasers
  • Light Sources
  • Multiplexing
  • Optical Fibers
  • Optics
  • Refraction
  • United States
  • United States Naval Academy

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Software Engineering

Technology Areas

  • Directed Energy