Optical transceiver and method with channel binding, clock forwarding, and integrate-and-dump receivers
An optical transceiver configured to interface a composite signal in a parallelized manner includes a plurality of transmitters each configured to transmit a part of the composite signal over a first optical fiber; a plurality of receivers each configured to receive a part of the composite signal over a second optical fiber; a clock forwarding mechanism configured to provide a transmitted optical clock for all of the plurality of transmitters; and a clock recovery mechanism configured to receive a received optical clock for all of the plurality of receivers.
1. An optical transceiver configured to interface a composite signal in a parallelized manner, the optical transceiver comprising:
a plurality of transmitters each configured to transmit a part of the composite signal over a first optical fiber;
a plurality of receivers each configured to receive a part of the composite signal over a second optical fiber;
a clock forwarding mechanism configured to provide a transmitted optical clock for all of the plurality of transmitters; and
a clock recovery mechanism configured to receive a received optical clock for all of the plurality of receivers, wherein the clock recovery mechanism comprises envelope detection on a Wavelength Division Multiplexing (WDM) input signal forming the composite signal to detect the received optical clock superimposed thereon using small-index modulation.
2. The optical transceiver of claim 1 , wherein the composite signal is formed from the parts from the plurality of transmitters and the plurality of receivers as optically bound channels in a same optical module.
3. The optical transceiver of claim 1 , wherein the composite signal is X formed by Y 1 , Y 2 , . . . , Y N parts that are each transmitted by the plurality of transmitters and each received by the plurality of receivers.
4. The optical transceiver of claim 1 , wherein the plurality of transmitters, the plurality of receivers, the clock forwarding mechanism, and the clock recovery mechanism are disposed in a same optical module.
5. An optical transceiver configured to interface a composite signal in a parallelized manner, the optical transceiver comprising:
a plurality of transmitters each configured to transmit a part of the composite signal over a first optical fiber;
a plurality of receivers each configured to receive a part of the composite signal over a second optical fiber;
a clock forwarding mechanism configured to provide a transmitted optical clock for all of the plurality of transmitters; and
a clock recovery mechanism configured to receive a received optical clock for all of the plurality of receivers, wherein the clock forwarding mechanism comprises envelope modulation on a Wavelength Division Multiplexing (WDM) output signal forming the composite signal to modulate the transmitted optical clock superimposed thereon using small-index modulation, and the clock recovery mechanism comprises envelope detection on a WDM input signal forming the composite signal to detect the received optical clock superimposed thereon using small-index modulation.
6. The optical transceiver of claim 5 , wherein the composite signal is formed from the parts from the plurality of transmitters and the plurality of receivers as optically bound channels in a same optical module.
7. The optical transceiver of claim 5 , wherein the composite signal is X formed by Y 1 , Y 2 , . . . , Y N parts that are each transmitted by the plurality of transmitters and each received by the plurality of receivers.
8. The optical transceiver of claim 5 , wherein the plurality of transmitters, the plurality of receivers, the clock forwarding mechanism, and the clock recovery mechanism are disposed in a same optical module.
9. The optical transceiver of claim 8 , further comprising:
a multiplexer coupled to the first optical fiber and configured to combine outputs from the plurality of transmitters using Wavelength Division Multiplexing (WDM); and
a demultiplexer coupled to the second optical fiber and configured to split inputs to the plurality of receivers using WDM,
wherein the multiplexer and the demultiplexer are disposed in the same optical module.
10. The optical transceiver of claim 9 , wherein the plurality of transmitters, the plurality of receivers, the clock forwarding mechanism, and the clock recovery mechanism, the multiplexer, and the demultiplexer are photonically integrated.
11. The optical transceiver of claim 5 , wherein the plurality of optical receivers comprise integrate-and-dump receivers without broadband transimpedance amplifiers and data-driven clock recovery therein.
12. The optical transceiver of claim 5 , wherein the plurality of transmitters utilize on-off keying modulation.
13. The optical transceiver of claim 4 , further comprising:
a multiplexer coupled to the first optical fiber and configured to combine outputs from the plurality of transmitters using Wavelength Division Multiplexing (WDM); and
a demultiplexer coupled to the second optical fiber and configured to split inputs to the plurality of receivers using WDM,
wherein the multiplexer and the demultiplexer are disposed in the same optical module.
14. The optical transceiver of claim 13 , wherein the plurality of transmitters, the plurality of receivers, the clock forwarding mechanism, and the clock recovery mechanism, the multiplexer, and the demultiplexer are photonically integrated.
15. The optical transceiver of claim 1 , wherein the plurality of optical receivers comprise integrate-and-dump receivers without broadband transimpedance amplifiers and data-driven clock recovery therein.
16. The optical transceiver of claim 1 , wherein the plurality of transmitters utilize on-off keying modulation.
17. A method comprising:
providing an optical transceiver configured to interface a composite signal in a parallelized manner, the optical transceiver comprising:
a plurality of transmitters each configured to transmit a part of the composite signal over a first optical fiber;
a plurality of receivers each configured to receive a part of the composite signal over a second optical fiber;
a clock forwarding mechanism configured to provide a transmitted optical clock for all of the plurality of transmitters; and
a clock recovery mechanism configured to receive a received optical clock for all of the plurality of receivers, wherein the clock recovery mechanism comprises envelope detection on a Wavelength Division Multiplexing (WDM) input signal forming the composite signal to detect the received optical clock superimposed thereon using small-index modulation.
18. The method of claim 17 , wherein the composite signal is formed from the parts from the plurality of transmitters and the plurality of receivers as optically bound channels in a same optical module.
19. The method of claim 17 , wherein the plurality of transmitters, the plurality of receivers, the clock forwarding mechanism, and the clock recovery mechanism, the multiplexer, and the demultiplexer are photonically integrated.
20. The optical transceiver of claim 17 , wherein the composite signal is X formed by Y 1 , Y 2 , . . . , Y N parts that are each transmitted by the plurality of transmitters and each received by the plurality of receivers.