Separation method of polarisation states

The nonlinear polarisation-vector translation (PVT) proposed by Poelman and Guy (1984) can effectively improve the interference suppression ability of a polarisation filter. But the algorithm becomes more complicated as the degree of nonlinearity increases. A separation method of polarisation states which is very simple and more suitable for realisation is put forward. It can basically improve the interference suppression capability. It is shown that the intrinsic interference suppression capability of a single-notch polarisation filter is only 50% (only half of the interference in the polarisation domain is filtered out). By using the `polarisation states´ separation method the interference suppression capability of the filter is improved from 57.7 to 100% corresponding to different polarisation states of the desired signal