Single Light Beam Coherent Optical Communication with Stokes Parameters
A new mode of coherent optical communication for QKD was proposed in this paper， there are two quadrature Stokes parameters, one is used as observed physical quantity, the other as the carrier wave. The EOM of 45 of azimuth is changed by continuously rotating the HWP, which indirectly complete the linear modulation of 2 S and 3 S parameters. The receiver adopts the Q-Q-H wave plate rotation mode to select the measured 2 S or 3 S . The detection system is built up in combination with LabVIEW to implement the signal demodulation. The results shown that the scheme is feasible.