Optical transmitter with optical receiver-specific dispersion pre-compensation

摘要

An apparatus comprising a digital signal processor (DSP) unit configured to perform fiber dispersion pre-compensation on a digital signal sequence based on a dispersion value to produce a pre-compensated signal, wherein the dispersion value is associated with a remote optical receiver, a plurality of digital-to-analog converters (DACs) coupled to the DSP unit and configured to convert the pre-compensated signal into analog electrical signals, and a frontend coupled to the DACs and configured to convert the analog electrical signals into a first optical signal, adding a constant optical electric (E)-field to the first optical signal to produce a second optical signal, and transmit the second optical signal to the remote optical receiver.

主权项

1. A method for use in an optical communication device, the method comprising:
pre-compensating a first digital signal sequence destined for a first remote optical receiver according to a first chromatic dispersion (CD) value associated with the first remote optical receiver to produce a first pre-compensated digital signal; removing a direct current (DC) component from the first ore-compensated digital signal; pre-compensating a second digital signal sequence destined for a second remote optical receiver according to a second CD value associated with the second remote optical receiver to produce a second pre-compensated digital signal; generating a pre-compensated optical signal from the first pre-compensated digital signal and the second pre-compensated digital signal by employing an optical in-phase and quadrature (I/O) modulation scheme; adding a constant optical electric (E)-field about equal to the DC component to the re-compensated optical signal; and transmitting the pre-compensated optical signal to the first remote optical receiver and the second remote optical receiver via an optical network.