Systems and methods for data center interconnects

Inventors: Haipeng Zhang (Broomfield, CO); Zhensheng Jia (Superior, CO); Mu Xu (Broomfield, CO); Luis Alberto Campos (Superior, CO)

Assignee: Cable Television Laboratories, Inc.

H04Q11/0067 H04B10/40 H04Q11/0005 H04Q2011/0016 H04Q2011/0081 H04Q2011/009

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Quick Facts

Patent No.: US 12696015
App. No.: 17/940,532
Granted: Jul 28, 2026
Kind: B1

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Abstract

A data center interconnect (DCI) includes a downstream (DS) transceiver array including one or more DS transceivers. The DCI further includes a first comb source in operable communication with the US transceiver array. The first comb source is configured to generate one or more first spaced optical signals. The DCI further includes an upstream (US) transceiver array including one or more US transceivers in operable communication, over an optical communication medium, with the one or more DS transceivers, respectively, of the DS transceiver array. The DCI further includes a second comb source in operable communication with the US transceiver array. The second comb source is configured to generate one or more second spaced optical signals.

Claims (26)

1 . A data center interconnect (DCI), comprising:

a downstream (DS) transceiver array including one or more DS transceiver and a first comb source configured to generate one or more first spaced optical signals; and

an upstream (US) transceiver array including one or more US transceivers in operable communication over an optical communication medium with the one or more DS transceivers, respectively, of the DS transceiver array, and a second comb source configured to generate one or more second spaced optical signals.

2 . The DCI of claim 1 , wherein the DS transceiver array is configured to communicate with the US transceiver array at a 1 Tb/s data rate.

3 . The DCI of claim 2 , comprising a single-lane topology having a single DS transceiver of the DS transceiver array in communication with a single US transceiver of the US transceiver array over a 1 Tb/s optical lane.

4 . The DCI of claim 3 , wherein the first and second spaced optical signals include a 64-QAM modulation format.

5 . The DCI of claim 3 , wherein the single DS transceiver and the single US transceiver comprise first and second coherent optical transceivers, respectively.

6 . The DCI of claim 5 , wherein the first and second coherent optical transceivers include first and second optical full field transmitters (OFFTs).

7 . The DCI of claim 2 , comprising a multi-lane topology having a number of DS transceivers of the DS transceiver array equal to a number of US transceivers of the US transceiver array.

8 . The DCI of claim 7 , wherein the multi-lane topology includes two optical lanes, and wherein the number of DS transceivers is 2.

9 . The DCI of claim 8 , wherein each lane of the two optical lanes communicates a data rate of 800 Gb/s.

10 . The DCI of claim 8 , wherein each transceiver of the DS transceivers and the US transceivers includes a coherent transmitter configured to utilize a DP-16PSK modulation format for a PAM-16 driving signal.

11 . The DCI of claim 7 , wherein the multi-lane topology includes three optical lanes, and wherein the number of DS transceivers is 3.

12 . The DCI of claim 11 , wherein each transceiver of the DS transceivers and the US transceivers includes a coherent transmitter configured to utilize a DP-8PSK modulation format for a PAM-8 driving signal.

13 . The DCI of claim 7 , wherein the multi-lane topology includes four optical lanes, and wherein the number of DS transceivers is 4.

14 . The DCI of claim 13 , wherein each lane of the four optical lanes communicates a data rate of 400 Gb/s.

15 . The DCI of claim 13 , wherein each transceiver of the DS transceivers and the US transceivers includes a coherent transmitter configured to utilize a DP-QPSK modulation format for a PAM-4 driving signal.

16 . The DCI of claim 15 , wherein the coherent transmitter comprises an optical full field transmitter (OFFT) including first and second phase modulators.

17 . The DCI of claim 16 , wherein each of the first and second phase modulators is configured to operate at 100 Gbaud.

18 . The DCI of claim 13 , further comprising (i) a fifth optical lane configured to function as a backup lane, and (ii) a wavelength selective switch (WSS) configured to switch operation from a particular lane of the four optical lanes to the fifth optical lane upon detection of a failure of the particular lane.

19 . The DCI of claim 7 , wherein the multi-lane topology includes eight optical lanes, and wherein the number of DS transceivers is 8, and wherein each lane of the eight optical lanes is configured for a 200 Gb/s data rate.

20 . A data center interconnect (DCI), comprising:

a downstream (DS) transceiver array including one or more DS transceivers;

a first comb source in operable communication with the DS transceiver array and configured to generate one or more first spaced optical tones and to transmit one optical tone of the one or more first spaced optical tones as a seed tone to a second comb source;

the second comb source in operable communication with the US transceiver array and configured to receive the seed tone and to generate one or more second spaced optical signals matching the one or more first spaced optical tones based on the seed tone.