Device to change an optical wave with a small waist diameter into a wave with a bigger waist diameter

摘要

2.1 Microlenses are used for mould fitting when coupling monomode fibres to optical semiconductor components. The aim now is to achieve this mode fitting with the elimination of optical lenses. …??2.2 For this purpose, a first integrated optical waveguide to which the semiconductor component is to be coupled is embedded in a second, larger waveguide to which the monomode fibre is to be coupled. The first waveguide narrows down in the form of a taper in the second waveguide and terminates at a distance from an end face of the second waveguide. The optical waveguide coupled into the first waveguide expands owing to the fact that this waveguide becomes thinner, up to the point where the wave guidance is taken over by the second waveguide. …??2.3 Application to optical semiconductor components, in particular optical transmitters. …IMAGE…