| CPC H04B 10/2513 (2013.01) [H04B 10/2589 (2020.05)] | 26 Claims |
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1. A method for optical communication between a first transceiver and a second transceiver through an optical link, the first transceiver and the second transceiver being configured to generate one or more chromatic dispersion (CD) pre-compensated optical signals by applying CD pre-compensation filters (PCD) to a plurality of signals and to send the CD pre-compensated optical signals through the optical link, the method comprising:
the second transceiver:
generating a first CD pre-compensated optical signal by applying a first PCD filter to a first signal;
generating a second CD pre-compensated optical signal by applying a second PCD filter to a second signal; and
sending the first and second CD pre-compensated optical signals to the first transceiver through the optical link; and
the first transceiver:
receiving the first and second CD pre-compensated optical signals;
calculating a first residual chromatic dispersion value (RCD value) from the received first CD pre-compensated optical signal;
calculating a second RCD value from the received second CD pre-compensated optical signal;
calculating a third PCD filter using the first RCD value;
calculating a fourth PCD filter using the second RCD value;
generating a third CD pre-compensated optical signal by applying the third PCD filter to a third signal;
generating a fourth CD pre-compensated optical signal by applying the fourth PCD filter to a fourth signal; and
sending the third and fourth CD pre-compensated optical signals to the second transceiver through the optical link,
wherein the CD pre-compensated optical signals comprise the first, second, third and fourth CD pre-compensated optical signals,
wherein the PCD filters comprise the first, second, third, and fourth PCD filters, and
wherein the plurality of signals comprises the first, second, third, and fourth signals.
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13. A transceiver for transmitting and receiving optical signals from another transceiver through an optical link, the transceiver being configured to generate chromatic dispersion (CD) pre-compensated optical signals by applying CD pre-compensation filters (PCD filters) to a plurality of signals, and to send the CD pre-compensated optical signals through the optical link, the transceiver being further configured to:
receive a first CD pre-compensated optical signal and a second CD pre-compensated optical signal from the other transceiver through the optical link, the first CD pre-compensated optical signal being generated by the other transceiver by applying a first PCD filter to a first signal, the second CD pre-compensated optical signal being generated by the other transceiver by applying a second PCD filter to a second signal;
calculate a first residual chromatic dispersion value (RCD value) from the received first CD pre-compensated optical signal;
calculate a second RCD value from the received second CD pre-compensated optical signal;
calculate a third PCD filter using the first RCD value;
calculate a fourth PCD filter using the second RCD value;
apply the third PCD filter to a third signal to generate a third CD pre-compensated optical signal; and
apply the fourth PCD filter to a fourth signal to generate a fourth CD pre-compensated optical signal; and
send the third and fourth CD pre-compensated optical signals to the other transceiver through the optical link,
wherein the CD pre-compensated optical signals comprise the first, second, third and fourth CD pre-compensated optical signals,
wherein the PCD filters comprise the first, second, third, and fourth PCD filters, and
wherein the plurality of signals comprises the first, second, third, and fourth signals.
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20. A transceiver for transmitting and receiving optical signals from another transceiver through an optical link, the transceiver being configured to generate chromatic dispersion (CD) pre-compensated optical signals by applying CD pre-compensation filters (PCD filter) to signals and send the CD pre-compensated optical signals through the optical link, the transceiver being further configured to:
generate a first CD pre-compensated optical signal by applying a first PCD filter to a first signal;
generate a second CD pre-compensated optical signal by applying a second PCD filter to a second signal;
send the first and second CD pre-compensated optical signals to the other transceiver through the optical link; and
receive a third CD pre-compensated optical signal and a fourth CD pre-compensated optical signal from the other transceiver through the optical link, the third CD pre-compensated optical signal being generated by the other transceiver by applying a third PCD filter to a third signal and the fourth CD pre-compensated optical signal being generated by the other transceiver by applying a fourth PCD filter to a fourth signal, the third PCD filter being calculated by the other transceiver by using a first residual chromatic dispersion value (RCD value) and the fourth PCD filter being calculated by the other transceiver by using a second RCD value, the first RCD value being calculated by the other transceiver from the received first CD pre-compensated optical signal and the second RCD value being calculated by the other transceiver from the received second CD pre-compensated optical signal,
wherein the CD pre-compensated optical signals comprise the first, second, third and fourth CD pre-compensated optical signals,
wherein the PCD filters comprise the first, second, third, and fourth PCD filters, and
wherein the plurality of signals comprises the first, second, third, and fourth signals.
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