Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2002-11-13
2004-06-01
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S237000, C359S245000, C398S183000, C398S188000
Reexamination Certificate
active
06744548
ABSTRACT:
FIELD OF INVENTION
The present invention relates generally to digital communications and networking technologies and analog technologies such as radar and particularly to modulator components therefor.
BACKGROUND OF INVENTION
It is an object of the present invention to provide advanced modulators whose high efficiency will permit superior digital telecommunications systems to be developed and commercialized. It is further an object of the present invention to provide advanced modulators whose high efficiency; and small size and weight, will enable radar imaging techniques to be deployed more widely and more flexibly in support of operations. It is a further object of the present invention that these modulator components permit the received radar return signal to be acquired directly, eliminating the need for amplification. It is further an object of the present invention that the receive array circuitry be integrated and packaged in a single compact receive module.
SUMMARY OF INVENTION
A modulator including: a plurality of branches; first and second RF electrodes; a first plurality of RF delay elements coupled to the first RF electrode and a second plurality of RF delay elements coupled to the second electrode; and, a plurality of electro-optic resonant elements each being respectively coupled for RF frequency energy exchange with a corresponding one of the RF delay elements and coupled for optical frequency electromagnetic energy exchange to at least one of the branches.
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“General IIR Optical Filter Design for WDM Applications Using All-Pass Filters”, C.K. Madsen, Journal of Lightwave Technology, vol. 18, No. 6, Jun. 2000, IEEE, pp. 860-868.
“Compact Microring Notch Filters”, P.P. Absi et al., IEEE Photonics Technology Letters, vol. 12, No. 4, Apr. 2000, pp. 398-399.
Duane Morris LLP
Epps Georgia
Hasan M.
Princeton Lightwave Inc.
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