Microlentillage d’une fibre optique

Abstract

The equipment of optical fibres of micro lenses is a permanent preoccupation in optoelectronics. The studies show that these components are declined in an extrinsic and intrinsic micro lenses. The first category is realized by adjunction of an external micro lens to fibre and the second category is obtained by fusion of the extremity of a point with optical fibre. The latter being process chemically. The difficulty of the first technique resides in the misalignment fibre-lens. The disadvantage of the second with tense with the difficulty in obtaining rayons of curvatures controlled. The technique suggested makes a correction of both preceding anomalies. It bases on a selective chemical corrosion test procedure practised in two stages. The action of the chemical attack on an optical fibre with gradient of index cleaved right produces a concave parabolic form at it extremity. This first stage is modelled and the transfer function of the model is given. The second stage consists with applied this transfer function to the pointed initial form of fibre. Because of the selective chemical attack, where the speed of the chemical attack is proportional to the index of refraction, the result of the convolution of the parabolic forms concave and the triangular point of form give a convex parabolic form. The latter makes the parabolic micro lens. The consideration of comparative modeling of the model and the results reveals that this approach allows a control of the geometrical characteristic opto _geometric.