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Finite-element modeling of broad-band traveling-wave optical modulators

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3 Author(s)
Koshiba, M. ; Dept. of Electron. & Inf. Eng., Hokkaido Univ., Sapporo, Japan ; Tsuji, Y. ; Nishio, M.

A full-wave finite-element method with hybrid edge/nodal elements is, for the first time, applied to investigating the frequency dispersion of microwave propagation characteristics of broad-band traveling-wave (TW) optical modulators using planar electrode configurations. In order to produce a two-step analysis of electrooptic modulation of optical waveguides, the microwave electrode solver is linked to the optical waveguide solver. Numerical results are shown for an ultrabroad-band TW LiNbO3 Mach-Zehnder optical modulator with a ridge structure, and the necessity of using the full-wave solver is verified by comparing the calculated 3-dB bandwidth and half-wavelength voltage with the experimental data

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:47 ,  Issue: 9 )