Testing of optical waveguides (TOW) cooperative project: preliminary results of the characterization of k-exchanged waveguides

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Abstract
The preliminary results of a round-robin test to check the reproducibility of the measurement of the main optical characteristics of gradient-like planar waveguides are reported. The test involves seven research laboratories in Europe and Canada. The effective indexes of a set of planar waveguides produced by K+/Na+ ion-exchange have been measured in each laboratory and the refractive-index profiles have been reconstructed by various numerical methods. The comparison between the reconstructed profiles and the directly measured one is also shown for one of the waveguides under test.

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