FM-MRR Analog Audio System

Abstract

In this work, we describe a hybrid free-space infrared communications link that supports audio transmission. The technique combines conventional frequency modulation "FM" techniques with optical amplitude modulation "AM" with a Multiple Quantum Well "MQW" Modulating Retroreflector "MRR" technology. The method has produced a robust, low power system capable of transmitting high quality audio information over a free space infrared link extending to multiple kilometers, depending on the characteristics of the Transmit/Receiver "interrogator" and the sensor/ MRR unit at the data source.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA470520

Entities

People

  • G. Charmaine Gilbreath
  • J. L. Murphy
  • M. M. Sepantaie
  • P. G. Goetz
  • Williams S. Rabinovich

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude Modulators
  • Analog Signals
  • Audio Amplifiers
  • Bandwidth
  • Compression
  • Detectors
  • Frequency
  • Impedance
  • Interrogators
  • Military Research
  • Modulation
  • Modulators
  • Quantum Wells
  • Transmitters
  • Voltage
  • Voltage Controlled Oscillators

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Radar Systems Engineering.
  • Sensor Fusion and Tracking Systems.

Technology Areas

  • Quantum Computing
  • Quantum Science - Quantum Key Distribution
  • Space