Abstract
Although highly multimode optical fiber waveguides have important advantages over single mode fibers, namely they can be used with incoherent sources and they are relatively easy to splice, differences in the group velocities of the various modes can produce appreciable pulse broadening. It is well known that this broadening is very dependent on the index profile of the fiber and, although there is no profile that can reduce it to zero, certain profiles can make it extremely small.
© 1975 Optical Society of America
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