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Quasistatic analysis of coupled coplanar waveguide traveling‐wave electrodes for electro‐optic modulators
Author(s) -
Hong IcPyo,
Park SeongKyoon,
Park HanKyu
Publication year - 1999
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/(sici)1098-2760(19990220)20:4<284::aid-mop19>3.0.co;2-f
Subject(s) - quasistatic process , coplanar waveguide , electrode , optoelectronics , optics , materials science , traveling wave , waveguide , physics , telecommunications , engineering , microwave , mathematics , quantum mechanics , mathematical analysis
In this letter, an LiNbO 3 optical modulator using a coupled coplanar waveguide (CPW) with an SiO 2 buffer layer is analyzed accurately by incorporating the traveling‐wave electrode thickness effect. The effect of coupled ground planes, electrode, and buffer layer thickness on the effective dielectric constant and characteristic impedance of coupled CPW electrode is discussed. Numerical computations show that increasing the width of the coupled ground planes can slightly improve the phase velocity mismatch between electric and optical waves. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 20: 284–286, 1999.