Relations between near-field and far-field intensities, radiance, and modal power distribution of multimode graded-index fibers

Abstract

A relation between the modal power distribution and the radiance at the fiber end face is derived. From this relation near-field and far-field intensities are expressed in terms of the modal power distribution. The relation for the far-field intensity is discussed in detail for some special cases.

© 1981 Optical Society of America

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