Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2005-06-28
2005-06-28
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S281000
Reexamination Certificate
active
06912080
ABSTRACT:
The magneto-optic modulator rotates a polarization of a light incident to a magneto-optic device which causes Faraday effect under such a magnetic field arrangement that the RF magnetic field has a component perpendicular to a light propagation direction and the RF magnetic field is directed to more than ±30° from the bias magnetic field direction. The bias magnetic field generator may be a permanent magnet, while the RF magnetic field generator may be a strip line running along a waveguide for the incident light. The strip line is fed by an RF electric current signal. The light beam is modulated at a frequency as high as about 10 GHz. The modulation depth can be further improved by using an impedance transformer and magnetic core.
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Choi William
Epps Georgia
Woo Louis
LandOfFree
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