Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2006-03-28
2006-03-28
Mack, Ricky L. (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C359S237000, C359S238000, C359S279000, C359S276000
Reexamination Certificate
active
07019882
ABSTRACT:
A coherent optical link includes a laser master oscillator operative to generate an amplitude- and phase-stable narrow linewidth optical carrier, a first programmable read-only memory (PROM) having an input for receiving and encoding an M-ary data word, a first digital-to-analog (D/A) converter operative to obtain the amplitude-encoded M-ary data word and output a corresponding analog signal, a Mach-Zehnder intensity modulator that obtains the analog signal and intensity-modulates the carrier based on the analog signal, an optical phase modulator having an input, and an optical waveguide that connects the Mach-Zehnder intensity modulator to the input of the optical phase modulator. The Mach-Zehnder intensity modulator and optical phase modulator may be formed into a single package. A modulation method includes modulating an intensity of an optical signal using a Mach-Zehnder intensity modulator, and then modulating the phase of the intensity-modulated optical signal.
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Berube Robert B.
Crouch Robert G
Float Kenneth W.
Mack Ricky L.
Thomas Brandi
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