Beam-oscillation suppressor for multimode gradient-index fibers.
The oscillations about the fiber axis that generally accompany a beam injected eccentrically into a gradient-index fiber can be substantially suppressed. It is shown how the constraint of Liouville's theorem, which was thought to preclude this effect, is satisfied inma system of two coupled fibers. The length of the coupled-fiber section required for operation is found.
Kahn
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Yang
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