摘要 |
The present invention relates to an optical modulator, divided into at least two active segments separated by at least one passive segment. The modulator comprises: an optical waveguide with an optical group index n<SUB>o </SUB>having an optical signal propagating at an optical velocity v<SUB>o</SUB>, and a microwave transmission line with an electrical propagation index n<SUB>p</SUB>, having an electrical signal propagating at an electrical velocity V<SUB>e</SUB>. The electrical propagation index n<SUB>p </SUB>of the unloaded microwave transmission line is lower than the optical group index n<SUB>o </SUB>of the optical waveguide. The loading and length of the microwave transmission line are adjusted for a specific Bloch impedance and electrical velocity v<SUB>e</SUB>. The invention also relates to a method for adapting the impedance of an optical modulator.
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