Optical vector modulator

Details Optical vector modulator Optical vector modulator

2007-03-23

2009-10-27

Doan, Jennifer (Department: 2874)

Optical waveguides

Miscellaneous

C385S015000, C385S024000, C398S182000, C398S183000

Reexamination Certificate

active

07609935

ABSTRACT:
An optical vector modulator includes an information generator that generates a plurality of N-bit streams at an output where each of the plurality of N-bit streams represents a desired modulation point in a signaling constellation. A memory look-up table having an N-bit address input retrieves a first and a second stored value that corresponds to the N-bit address input, where each of the first and the second stored value represent a respective one of a first and a second modulation vector of a desired modulation point in the signaling constellation. A first and a second digital-to-analog converter generates first and second analog signals, respectively, that correspond to respective ones of the first and second modulation vectors of the desired modulation points in the signaling constellation. A dual-drive interferometric modulator modulates the first and the second analog signals on the optical beam to obtain the desired modulation points in the signaling constellation.

REFERENCES:
patent: 7368890 (2008-05-01), Pande et al.
patent: 2007/0249300 (2007-10-01), Sorrells et al.

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