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Modal-noise generation in biconical-taper couplers

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Abstract

The modal noise resulting from the dividing of coherent light in fused biconical-taper star and access couplers is measured. The theoretical explanation of the results is presented. It is found that modal-noise generation is not severe even in those cases in which the light is strongly subdivided by a biconical-taper star coupler with a large number of ports. The performance of most digital fiber systems using such couplers is not expected to be significantly degraded by the measured levels of modal noise.

© 1981 Optical Society of America

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