LIGHT COUPLING BETWEEN A LIGHT SOURCE AND AN OPTICAL WAVEGUIDE

摘要

A coupling technique for the side coupling of light from a light source into a waveguide is provided, A transversal groove is made into a section of the waveguide, extending into the target light guiding region. A coupling elemen t is coupled to the light source at one of its end to receive the light beam therefrom. The opposite end of the coupling element is inserted in the groove and has a t least one reflecting interface which specularly reflects the light beam for propagation into the waveguide. This technique may advantageously be used to couple ligh t from the laser diodes of an array into one or a plurality of optical fibers.