Patent ID: 8311415

Claim:
A frequency up-conversion system comprising: an optical splitter configured to split an input wave into a first optical wave and a second optical wave; an optical modulator configured to modulate the first optical wave based on an electrical wave to generate a modulation wave, wherein the optical modulator is biased at 2Vπ; an optical phase shifter configured to shift the second optical wave by a predetermined phase to generate a shifting wave, wherein the shifting wave is not modulated and the predetermined phase is opposite to a phase of the second optical wave; an optical coupler configured to couple the modulation wave and the shifting wave to generate an optical output wave; and an optical interleaver coupled to an output terminal of said optical coupler, wherein the optical interleaver is configured to filter the optical output wave such that one or more frequency components between an outermost optical carrier or a signal subcarrier in one of an upper sideband and a lower sideband and a signal subcarrier in the other of the upper sideband and lower sideband are filtered out.