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Design and fabrication of an organic/inorganic hybrid co-planar waveguide electro-optic modulator

Author(s): Weinan Gao | Jie Sun | Xiaoqiang Sun | Yunfei Yan | Lei Gao | Daming Zhang

Journal: Optica Applicata
ISSN 0078-5466

Volume: 39;
Issue: 3;
Start page: 467;
Date: 2009;
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Keywords: organic/inorganic | electro-optic modulator | strip-loaded | Mach&ndash | Zehnder

We have successfully designed and demonstrated a co-planar waveguide (CPW) Mach–Zehnder (MZ) electro-optic (EO) modulator using a strip-loaded waveguide structure. The hybrid material, easily synthesized by sol–gel process, with a large EO coefficient of r33 = 50 pm/V and a long- -term stability at 80 °C for 200 hours is selected as the active layer. A simple and easily fabricated strip-loaded waveguide structure is designed for utilizing the EO material and reducing  the coupling loss with optical fiber. The optimized design principles of the efficient transmission for such a modulator are discussed. The measured half-wave voltage of 8.5 V for the MZ modulator is gained at 1550 nm and shows a good agreement with the simulating result. 

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