Abstract

Time-dependent coupled-power equations describing the transmission of light in multimode optical fibers are discussed, and a new method, using the temporal moments of transmitted light pulses, is described. This method, as well as showing details of a fiber’s steady state and how it is reached, yields approximate equations for the length-dependence of pulse broadening in long chains of nonuniform fibers with mode mixing. These approximations are based on closed-form solutions for a two-mode waveguide, but they are generalized and seem to be useful as a mathematical model for long optical cables.

© 1979 Optical Society of America

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