Quadrature amplitude modulation of optical carriers

Details Quadrature amplitude modulation of optical carriers Quadrature amplitude modulation of optical carriers

2011-01-18

2011-01-18

Wang, Quan-Zhen (Department: 2629)

Optical communications

Transmitter

Having particular modulation

Reexamination Certificate

active

07873284

ABSTRACT:
An apparatus includes an optical splitter, an optical combiner, first and second optical paths, and a digital signal generator. The optical splitter has an input port and first and second output ports. The optical combiner has first and second input ports and an output port. The first optical path couples the first output port of the splitter to the first input port of the combiner. The second optical path couples the second output port of the splitter to the second input port of the combiner. Each optical path includes an electro-optical phase shifter, and one of the optical paths includes an electro-optical attenuator. The digital signal generator is configured to apply binary-valued voltage signals to control inputs of the phase shifters and the attenuator.

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