Patent ID: 9544064
Date: 2017-01-10
CPC Classifications: H04B,H04J,H04L

Claim:
1. An optical spectrum inverter, configured for counteracting phase distortion effects in an optical channel over a predefined frequency range, comprising: an optical receiver comprising a polarization diversity unit configured for polarization resolved detection, wherein the optical receiver is configured for receiving an optical input signal comprising a first wavelength span and for converting the optical input signal to an electrical signal; and an optical modulator connectable to the optical receiver and configured for modulating the electrical signal onto an optical signal, wherein the optical modulator comprises an optical filter which is configured for selecting a second wavelength span of the optical signal corresponding to an optical output side band of an inverted spectrum of the optical channel such that phase distortion effects are counteracted at least partly over the predefined frequency range, wherein the optical receiver further comprises: wherein the optical modulator further comprises at least two Mach-Zehnder amplitude modulators and a second lasing unit configured for providing a laser carrier signal.