Systems and methods for full duplex coherent optics
A full duplex communication network includes an optical transmitter end having a first coherent optics transceiver, an optical receiver end having a second coherent optics transceiver, and an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver. The first coherent optics transceiver is configured to simultaneously transmit a downstream optical signal and receive an upstream optical signal. The second coherent optics transceiver is configured to simultaneously receive the downstream optical signal from the first coherent optics transceiver and transmit the upstream optical signal first coherent optics transceiver. At least one of the downstream optical signal and the upstream optical signal includes at least one coherent optical carrier and at least one non-coherent optical carrier.
1. A full duplex communication network, comprising:
a first coherent optics transceiver having a first transmitting portion, a first receiving portion, and a control layer;
a second coherent optics transceiver having a second transmitting portion and a second receiving portion;
an optical transport medium operably coupling the first coherent optics transceiver to the second coherent optics transceiver; and
a coherent optics interface disposed within the first coherent optics transceiver, and including (i) a lineside interface portion, (ii) a clientside interface portion, and (iii) a management interface portion in communication with the control layer separately from the lineside interface portion and the clientside interface portion,
wherein the clientside interface portion is in electrical communication with the first transmitting portion and the first receiving portion,
wherein the lineside interface portion comprises a directional element disposed between (i) the optical transport medium, and (ii) the first transmitting portion and the first receiving portion, such that the directional element provides a dual optical communication interface with the first transmitting portion and the first receiving portion, respectively, and a single optical communication interface with the optical transport medium.
2. The network of claim 1 , wherein the optical transport medium is a single mode fiber.
3. The network of claim 1 , wherein at least one of the first transmitting portion and the second transmitting portion comprises a coherent modulator.
4. The network of claim 3 , wherein the coherent modulator is configured to convert an electrical signal from the clientside interface portion into at least one coherent optical carrier for transmission to the lineside interface portion over the optical transport medium through the directional element.
5. The network of claim 1 , wherein at least one of the first receiving portion and the second receiving portion comprises a coherent detector.
6. The network of claim 5 , wherein the coherent detector is configured to convert the at least one coherent optical carrier from the optical transport medium into an electrical signal within the coherent optics interface.
7. The network of claim 1 , wherein the first transmitting portion comprises at least one of an Ethernet mapping unit, an optical transport network (OTN) framing unit, a forward error correction (FEC) coding unit, a symbol mapping unit, a linear and nonlinear pre-emphasis unit, a digital-to-analog converter, and an I/Q modulation and polarization combining unit.
8. The network of claim 7 , wherein the first receiving portion comprises at least one of an I/Q detection unit, an analog-to-digital converter, a deskew and orthogonality compensation unit, a chromatic dispersion compensation unit, a polarization mode dispersion compensation unit, a polarization multiplexing unit, a clock recovery unit, a carrier frequency offset compensation unit, a carrier phase compensation unit, a symbol demapping unit, an FEC decoding unit, an Ethernet demapping unit, and an OTN framing unit.
9. The network of claim 1 , wherein the first transceiver further comprises a framing unit in operable communication with the clientside interface portion and the control layer.
10. The network of claim 9 , wherein the framing unit further comprises at least one of a physical coding sublayer and an optical transport unit.
11. The network of claim 9 , wherein the framing unit is disposed between (i) the clientside interface portion, and (ii) the first transmitting portion and the first receiving portion.
12. The network of claim 9 , wherein the first transmitting portion and the first receiving portion are in separate communication with the framing unit and the control layer.
13. An interface subsystem for a coherent optical transceiver, comprising:
a directional element for optical communication with;
an optical transmitter for transmitting optical signals to an optical transport medium;
an optical receiver for receiving optical signals from the optical transport medium;
a control layer;
an electrical interface portion in communication with the coherent optical transceiver on a host side of the interface subsystem;
a management interface portion in operable communication with the control layer; and
an optical interface portion disposed between (i) the optical transmitter and the optical receiver, and (ii) the optical transport medium, on a line side of the interface subsystem,
wherein the optical interface portion comprises a single interface structure to the optical transport medium, and a respective dual interface structure to the optical transmitter and the optical receiver.
14. The interface subsystem of claim 13 , wherein the optical interface portion further comprises a directional element in optical communication with the optical transport medium, the optical transmitter, and the optical receiver.
15. The interface subsystem of claim 13 , further comprising a framing unit disposed between (i) the electrical interface portion, and (ii) the optical transmitter and the optical receiver.