A method of modulation implemented by a polarization insensitive integrated optical modulator (PIIOM). The method includes receiving, at an input, a continuous wave (CW) light, splitting, by a first polarization splitter-rotator (PSR), the CW light into a first light beam having a transverse electric (TE) polarization and a second light beam having a transverse magnetic (TM) polarization, rotating, by the first PSR, the second light beam having the TM polarization to generate a third light beam having the TE polarization, modulating, with a multiport modulator, the first light beam with data to generate a first output signal and the third light beam with data to generate a second output signal, combining, by a second PSR, the first output signal and the second output signal to form a modulated output CW light, and transmitting, at an output separate from the input, the modulated output CW light to an optical receiving device.
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