You demonstrate manner for the digital demodulator device which treats the lightwave signal to be received, concerning the system, and the device. This device receives the digital edition of the lightwave signal, removes orthogonal error and can include the orthogonal error filter which generates the consecutive data sample of the filter treatment being completed. In addition as for this device, it can include the frequency offset removal module which does frequency revolution vis-a-vis the consecutive data sample of the filter treatment being completed. This device can include the wavelength dispersion compensating module which removes wavelength dispersion from horizontality and the vertically polarized wave channel. This device polarized wave mode distribution (PMD) with polarized wave dependence loss (PDL) can include the PMD/PDL compensating module which compensates the interference which originates. In addition as for this device, it traces phase and in order amendment, it can include the phase recovery module which is formed. Choice figure Drawing 1
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