OPTICAL POLARIZATION DEMULTIPLEXING FOR A COHERENT-DETECTION SCHEME

摘要

An optical receiver having a plurality of optical IQ modulators arranged in a butterfly configuration and configured to operate as an optical polarization de-multiplexer. The optical receiver further has (i) an opto-electric circuit configured to apply optical homodyne detection to an optical input signal received by the optical receiver and (ii) a controller configured to generate one or more control signals for driving the IQ modulators of the plurality based on one or more electrical feedback signals received from the opto-electric circuit.

主权项

1. An apparatus comprising:
a first optical IQ modulator configured to modulate a first portion of a first polarization of an optical polarization-division-multiplexed, “PDM,” signal to generate a first modulated optical signal; a second optical IQ modulator configured to modulate a second portion of the first polarization of the optical PDM signal to generate a second modulated optical signal; a third optical IQ modulator configured to modulate a first portion of a second polarization of the optical PDM signal to generate a third modulated optical signal; and a fourth optical IQ modulator configured to modulate a second portion of the second polarization of the optical PDM signal to generate a fourth modulated optical signal, wherein the apparatus is configured to:
combine the first modulated optical signal and the third modulated optical signal to generate a first optical output signal; andcombine the second modulated optical signal and the fourth modulated optical signal to generate a second optical output signal.