Phase modulator for semiconductor waveguide
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United States of America Patent
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Oct 2, 2001
Issued Date -
N/A
app pub date -
Mar 23, 2000
filing date -
Mar 25, 1999
priority date (Note) -
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Abstract
An optical phase modulator comprises a semiconductor rib wave guide having P and N doped regions forming a PN junction along the path of the rib with terminals for applying a reverse bias to the junction to extend a carrier depletion zone to alter the refractive index, the PN junction is offset from the central axis of the rib but on application of the reverse bias the depletion zone extends over a central axis of the waveguide.
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