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.
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