Abstract
We present a complete model and design approach for high speed electro-optic
(EO) polymer modulators. A general numerical model for arbitrary travelling-wave
EO modulators is built, and the dispersion characteristic of each polymer
layer in the device stack is carefully considered and integrated into the
model. A velocity compensation layer is added to allow more room for increasing
the waveguide core index to optimize half-wave voltage of the device. Microstrip
mode analysis is also included to estimate the influence of different polymer
stack to the E filed distribution inside the waveguide core. The device has
been successfully designed and achieves more than 45 GHz EO bandwidth with
a half-wave voltage of 3.2 V. A 100 Gbps EO modulator is under development.
© 2009 IEEE
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