A number of papers which demonstrate the use of differential white-light interferometry in optical communications have been published.1-3 In particular, the use of multiple transmitter and receiver interferometers for multiplexed communications using a broadband source was proposed as early as 1976.2 More recently, differential white-light interferometry has been utilized in the area of coherence multiplexed interferometric fiber sensors.4 Initial experimental results obtained in the sensor area showed that the sensitivity was limited by excess phase noise. We recently reported a technique, based on high-frequency rf modulation of the laser optical frequency, which greatly reduces this excess noise and demonstrated for the first time, we believe, an all-fiber two-sensor coherence multiplexed system.5 We report the extension of this work to the area of multiplexed communications, presenting an analysis of the different system architectures possible and demonstrating for the first time, we believe, a complete fiber-based two-transmitter-receiver multiplexed communications link.

© 1988 Optical Society of America

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