Dual-Output Coherent Optical Technology

A dual-output transmitter, comprising:

• a plurality of Mach-Zehnder Modulators (MZMs) configured to receive a laser output signal and to each output an original inphase component or an original quadrature component based on the laser output signal;
• a first polarization beam combiner coupled to the plurality of the plurality of MZMs and configured to combine a first original inphase component and a first original quadrature component in a X-polarization plane and a Y-polarization plane to produce a first transmit signal, in which the first original inphase component is based on a first signal generated by a first MZM of the plurality of MZMs and the first original quadrature component is based on a second signal generated by a second MZM of the plurality of MZMs;
• and
• a second polarization beam combiner coupled to the plurality of the plurality of MZMs and configured to combine a first complementary inphase component and a first complementary quadrature component in the X-polarization plane and the Y-polarization plane to produce a second transmit signal, in which the first complementary inphase component is based on a third signal generated by a third MZM of the plurality of MZMs and the first complementary quadrature component is based on a fourth signal generated by a fourth MZM of the plurality of MZMs, and
• wherein the first transmit signal and the second transmit signal contain equivalent information.