Hybrid Electrodes Used in Polymer Electro-Optic Modulator with Ultra-Broadband |
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Authors: | Haibo Peng Boyu Wu Qiong Song Fei Lu and Shuyun Luo |
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Institution: | (1) Department of Electrical Engineering, Tinghua University, Beijing, 100084, People's Republic of China |
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Abstract: | Hybrid electrode combined coplanar waveguide (CPW) and microstrip lines in ultra-broadband electro-optic modulators. The characteristics of the modulators with hybrid electrode is like that of the modulator with the microstrip lines, in which the microstrip electrode is loaded above only one arm of Mach-Zehnder (M-Z) optical waveguide, besides the problem of microstrip line to coaxial transition and corona polarization in polymer modulators have been best solved at the same time. By using finite element method (FEM), the characteristic parameters such as half-wave voltage, modulation bandwidth characteristic impedance, effective microwave refractive index of polymer modulators with microstrip line and hybrid electrode are analysed and compared in this paper. The results present that velocity match, impendence match and lower microwave propagating loss is easily realized in modulators with hybrid electrode. |
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Keywords: | Polymer modulators Hybrid electrode Finite Element Method Microstrip |
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