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Published July 1, 1992 | public
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A reduction of interferometric phase-to-intensity conversion noise in fiber links by large index phase modulation of the optical beam

Yariv, Amnon
Blauvelt, Hank
Wu, Shu-Wu
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Abstract

A noise reduction scheme for long haul fiber amplitude modulation (AM) systems is proposed and analyzed. Such systems suffer from intensity noise which results from interference between the (twice) Rayleigh scattered light and the directly transmitted beam. This interference converts the fundamental phase noise of the laser to intensity noise. It is shown that a strong phase modulation of the output of the laser beam causes a large reduction of the detected signal noise in the vicinity of the detected signal components

Additional Information

"©1992 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." Manuscript received July 22, 1991; revised January 11, 1992. S.-W Wu was supported in part by the office of Naval Research and the National Science Foundation. This work was supported in part by the Office of Naval Research, the Air Force Office of Scientific Research, and the Defense Advanced Research Project Agency. The authors would like to acknowledge useful discussion with Dr. Israel Ury. A similar problem involving interferometric conversion of phase to intensity noise from a small number of reflections was considered independently by P. K. Pepeljugoski and K.Y. Lau.

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