OPTICAL HOMODYNE COHERENT RECEIVER AND METHOD FOR RECEIVING A MULTICHANNEL OPTICAL SIGNAL

摘要

This disclosure relates to an optical receiver arrangement (500) and a method for receiving a multichannel optical signal OB in an optical receiver arrangement (500), wherein the optical signal OB comprises a number of optical channels A, B, C, D equally distributed around an optical carrier frequency fLO and wherein the optical receiver arrangement (500) comprises an optical homodyne receiver (200) and a multichannel recovery unit (300). The method comprises the actions of: receiving and detecting the multichannel optical signal OB so as to provide at least one electrical quadrature signal IQV comprising at least one folded channel A+D, wherein each folded channel A+D correspond to a set of two optical channels A, D collapsed onto each other; and up converting said at least one electrical quadrature signal IQV so as to provide at least one up converted quadrature signal IQV-UP comprising at least one pair of two separated unfolded channels A, D, wherein each pair correspond to the two optical channels A, D of an unique folded channel A+D; and demodulating said at least one up converted quadrature signal IQV-UP so as to provide one baseband quadrature signal IQA, IQD for each un folded channel A, D such that each baseband quadrature signal IQA, IQD corresponds to one unique optical channel A, D.