Abstract

The optical coupling between domed light-emitting diodes (LEDs) and a multimode step-index optical fiber has been analyzed via computer ray tracing. Configurations both with and without a microlens positioned between the LED and fiber have been investigated. To facilitate comparisons between domed and flat LED systems, efficiencies are measured in terms of the normalized coupled power, defined as the ratio of the power coupled into the fiber to the power generated inside the LED and directed toward the LED surface.

© 1986 Optical Society of America

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