A optical polarization controller for receiving an input light beam and outputting a transverse magnetic (TM) polarized light beam or transverse electric (TE) polarized light beam is provided. The optical polarization controller includes a polarization splitting device and a half-wave plate. The polarization splitting device is provided for receiving the input light beam and outputting a first light beam and a second light beam. In addition, the half-wave plate is switchably disposed in the light path of the first light beam or the second light beam.