Abstract
We present a new multisectional model for high-speed electrooptic
modulators, fully integrated within the framework of a microwave circuit
computer-aided design (CAD) suite (MWOFFICE [1]). Starting from
geometrical and layout parameters, the model allows both simple
(traveling-wave) and complex (phase reversal, periodically loaded)
structures to be assembled, analyzed, and optimized from the standpoint of
the electrical and electrooptic response (including chirp effects) both in
small-signal (analog) and in large-signal (digital) operation, exploiting
standard simulator tools. At no additional effort, parasitic and passive
elements (such as optical or electrical delay paths) can be directly
included in the modulator schematic, and the effect of transitions and
package parasitics can be readily accounted for at a circuit level.
Moreover, model integration within a circuit CAD suite enables one to
seamlessly perform driver and modulator design and optimization within the
same monolithic or hybrid circuit environment. Comparisons with
experimental and literature data and design examples are presented to
validate the approach and stress its potential in the design of high-speed
electrooptic modulators.
© 2003 IEEE
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