Abstract
Existing geometric-optical techniques for exciting and analysing modes in a multimode optical fibre have proved insufficient in treating single fibre modes. We discuss the principle of wave-optical methods using computer-generated matched-filter holograms for the synthesis and analysis of arbitrary fibre fields in terms of suitable orthogonal functions, and report on progresses in the making of such filters. Our techniques could gain importance in evaluating the speckle pattern at the end-face of multimode fibre sensors.
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