Optical waveguides – Temporal optical modulation within an optical waveguide
Reexamination Certificate
2006-04-18
2006-04-18
Boutsikaris, Leonidas (Department: 2872)
Optical waveguides
Temporal optical modulation within an optical waveguide
C385S002000, C385S008000, C359S254000
Reexamination Certificate
active
07031558
ABSTRACT:
A low-pass filter transmission line with an integral electro-absorption modulator is described. In one aspect, the electro-absorption modulator functions as an element of a distributed low-pass filter transmission line circuit that is impedance-matched to a target source impedance. In this way, the electrical voltage that is delivered across the electro-absorption modulator may be optimized because the electrical losses do not occur in the low-pass filter transmission line circuit, but rather substantially all incident power is absorbed in a downstream matched termination load. In another aspect, the electro-absorption modulator has a signal electrode with a segmented traveling wave structure that provides substantially the same modulation performance as a similar un-segmented signal electrode of comparable effective length, but is characterized by a substantially higher bandwidth.
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