A taper coupler for integrated optics formed by ion-exchange under a non-uniform electric field |
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| Institution: | 1. School of Materials Science and Engineering, Kunming University of Science and Technology, Xuefu RD, Kunming 650093, PR China;2. Key Lab of Advanced Materials in Rare & Precious and Nonferrous Metals (Kunming University of Science and Technology), Ministry of Education, Xuefu RD, Kunming 650093, PR China |
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| Abstract: | A method for the formation of gradient index tapered optical waveguides with predicted shape is proposed and described analytically. The method is applicable for structures fabricated by electric-field assisted ion-exchange in glass. The technique is based on the control of the taper shape by applying a non-uniform electrical field during the waveguide formation process. For experimental verification optical waveguides with tapers were formed by electrically induced migration of K+ ions. An optical coupler based on such a tapered waveguide has demonstrated 1.2° outcoupled beam divergence. The method proposed can be used to form different integrated optical elements, e.g. mode filters, horn structures etc. |
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