Patent ID: 8818206

Claim:
A system for electrical domain suppression of linear crosstalk, comprising: an analog, electrical, radio frequency (RF) domain, low pass filtering circuit adapted to receive a data stream that is split into a quadrature signal and an in-phase signal; an analog signal linearization circuit configured to linearize outputs of the low pass electrical filtering circuit in the electrical domain and output a linearized quadrature signal and a linearized in-phase signal; an optical modulator biased at a transmission null point and receiving the linearized quadrature signal and the linearized in-phase signal from the linearization circuit; wherein the linearization circuit reduces a modulation index for the optical modulator to approximately 50%; wherein the low pass filtering circuit is configured with an adjustable pass-band equal to an optical bandwidth of a modulated optical signal produced by the modulator; and wherein signal paths for the linearized quadrature signal and the linearized in-phase signal do not include a digital to analog converter (DAC) between the linearization circuit and the optical modulator.