Retrieving the polarization information for light communication

The transmission performances of polarization information in various scattering systems were introduced based on Stokes vectors and Monte Carlo(MC) simulation algorithm. According to the Stokes vectors' scattering characteristics of polarized light, the polarization retrieve(PR) method was proposed theoretically, which is aiming at reducing the scattering impact on incident polarized light and increasing the transmission efficiency of light signals. In order to prove the availability and practicability of PR method, simulations on the polarization transmission and reconstruction in atmosphere and underwater, were complemented in different actual environmental circumstances. The results demonstrate that the PR method is more applicable to disordered media with relatively larger particles and the longer wavelengths can reduce the loss of polarization information effectively. Furthermore, the simulated results reveal that the downlink and uplink are not exchangeable in an inhomogeneous atmospheric medium. In underwater, the PR method is also used to reduce the scattering impacts on the degree of polarization(DoP) of the light, and the maximal enhancement of the degree of linear polarization(DoLP) can reach to about 16% by PR method. These results are significant to the quantum secure communication in atmosphere and underwater in future.