Duobinary modulation scheme for a mach-zehnder optical...

Details Duobinary modulation scheme for a mach-zehnder optical... Duobinary modulation scheme for a mach-zehnder optical...

G - Physics

02

F

G02F 1/225 (2006.01) G02F 1/01 (2006.01) G02F 1/017 (2006.01) G02F 1/21 (2006.01)

Patent

CA 2444124

In order to provide a low power duobinary modulator for the long reach 10Gb/s metro space that is relatively small and relatively inexpensive to make, a method of operating a Multiple Quantum Well (MQW) III-V Mach-Zehnder (MZ) optical modulator to have it provide a high-quality duobinary signal is provided. The method of operating the MQW III-V MZ optical modulator provided by the invention makes possible a high-quality duobinary modulator that has substantially balanced 'on' states. That is to say, both duobinary 'on' states are characterized by having respective output signals with substantially equivalent: peak intensities; high extinction ratios; and low frequency chirp.

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