Determination of Diffusion-Parameter Values in K+-Ion Exchange Waveguides Made by Diluted KNO3 in Soda-Lime Glass

Kiyoshi KISHIOKA  

IEICE TRANSACTIONS on Electronics   Vol.E78-C   No.10   pp.1409-1418
Publication Date: 1995/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electromagnetic Theory)
refractive-index profile,  ion-exchange waveguide,  optical waveguide,  optical integrated circuit,  

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In this paper, the diffusion parameter-values in the K+-ion diffused waveguides made by diluted KNO3 with NaNO3 in the soda-lime glass, which are determined from measured values of the effective index, are presented together with a simple method for the determination. The surface-index changes are measured for the waveguides by KNO3 melts with 75%-, 50%- and 30%-dilutions (weight ratio), and for comparison purpose, also by the pure KNO3, and the dependence of the index-profile on the dilution of KNO3 in the ion-source melt is shown. Change of the two-dimensional index profile in the diffused channel waveguide with the KNO3-dilution is also shown, which is calculated with the measured diffusion parameters.