Abstract
A ray tracing technique is used for calculating coupling efficiency between a light-emitting diode (LED) and an optical fibre. With an air interface, efficiency is estimated as a function of separation, waveguide diameter and source diameter, estimates are obtained using numerical methods. Initially the treatment considers a uniform source and is subsequently extended to Lambertian and weighted Lambertian distributions. The effect of numerical aperture on coupling coefficients is described.
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Colvin, J. Coupling (launching) efficiency for a light-emitting diode, optical fibre termination. Opto-electronics 6, 387–392 (1974). https://doi.org/10.1007/BF01476403
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DOI: https://doi.org/10.1007/BF01476403