Engineering of lightguide with enlarged effective area for telecommunication lines
The technique of engineering of lightguides with refraction index of singlemode inhomogeneous fibre optimized for inlarge effective area of mode field cross section is presented/ The method of solving of return scattering problem consisting in restoration of differential pperator from its spectral function is based in this technique. For verification of results the model experiment with solving of direct problem for obtaining waveguides is executed. Parameters of singlemode optical fibre that satisfy to the requirements for up to date telecommunication optical lines with spectral multiplexing are obtained.