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The subject of prism coupling into uniform clad waveguides in the strong coupling regime is revisted and coupling efficiencies are recalculated for the same numerical example presented in previous work. Contrary to former results, cladding is found to improve coupling efficiency significantly: increasing from 6% for no cladding to more than 70% for cladding just above cutoff. The largest source of error in the previously reported work was found to be improper normalization of the so-called ideal beam profile function. This error is largest for waveguides with no cladding.
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Joseph F. Revelli (1981) studied this question.
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