High capacity fiber-optic integrated transmission and switching systems

1. A reconfigurable electrical add/drop multiplexing node, comprising:

an optoelectronic integrated circuit comprising a transmitter section and a receiver section; and

a switching fabric communicatively coupling the transmitter section and the receiver section of the optoelectronic integrated circuit, wherein the transmitter section and the receiver section interface the switching fabric at a full signal level and the switching fabric is configured to perform flow switching on the full signal level between the transmitter section and the receiver section with subrate grooming of the full signal performed in a separate device external to the optoelectronic integrated circuit;

wherein the transmitter section comprises N channels formed by N lasers locked to a wavelength grid, and N modulators and drivers associated with each of the N lasers, and wherein the N modulators comprise one of a Mach-Zehnder modulator, an electro-absorption modulator, and a ring modulator with associated bandwidth, extinction ratio, and chirp control, and

wherein the receiver section is configured to receive each of the N channels optically and provide corresponding electrical signals based thereon through a polarization splitter, a horizontal demultiplexer coupled to the polarization splitter, a vertical demultiplexer coupled to the polarization splitter, photodiodes each coupled to one of the horizontal demultiplexer and the vertical demultiplexer, and transimpedance amplifiers each coupled to one of the photodiodes.

2. The reconfigurable electrical add/drop multiplexing node of claim 1 , wherein each of the N channels comprises a wavelength within a transparency spectrum of optical fiber.

3. The reconfigurable electrical add/drop multiplexing node of claim 1 , wherein the switching fabric comprises a multi stage switching fabric with a first stage communicatively coupled to a plurality of the receiver sections and a second stage communicatively coupled to a plurality of the transmitter sections.

4. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein a portion of the switching fabric is integrated within each of a plurality of optoelectronic integrated circuits with the associated receiver sections.

5. The reconfigurable electrical add/drop multiplexing node of claim 4 , wherein another portion of the switching fabric is integrated within each of the plurality of optoelectronic integrated circuits with the associated transmitter sections.

6. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein the switching fabric comprises an electrical cross point switch.

7. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein the switching fabric provides limited overhead processing without forward error correction coding, and, responsive to detection of a predetermined number of errors in the limited overhead processing, the switching fabric is configured to switch a signal to the separate device for forward error correction processing thereof.

8. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein the separate device is configured to provide an outer forward error correction code, and the receiver sections and the transmitter sections are configured to provide an inner forward error correction code that is terminated at each of a plurality of optoelectronic integrated circuits.

9. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein each of the receiver sections comprise a clock and data recovery block for each of the N channels determining coarse resolutions of errors therein.

10. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein each of the transmitter sections is configured to encode a parity check or low-overhead code for error counting on each of the N channels, and wherein each of the receiver sections is configured to decode the parity check or low-overhead code for measurement of a bit error rate on the respective channel.

11. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein each of the N channels is transmitted according to one of a binary channel and a quaternary channel based on an associated modulation format; and

wherein, for the binary channel, the full signal switched by the switching fabric comprises the binary channel, and wherein, for the quaternary channel, the full signal switched by the switching fabric comprises one of an in-phase (I) and a quadrature (Q) signal.

12. The reconfigurable electrical add/drop multiplexing node of claim 3 , wherein the switching fabric is one of fully and partially integrated with the optoelectronic integrated circuit through one of full integration in a same Complementary metal-oxide-semiconductor die, integration via an interposer layer within a same package, vertical stacking of the semiconductor die, and close proximity of independent packages.

13. The reconfigurable electrical add/drop multiplexing node of claim 1 , further comprising:

a demultiplexing structure coupled to the receiver section; and

a multiplexing structure coupled to the transmitter section;

wherein a portion of each of the demultiplexing structure and the multiplexing structure is integrated within the optoelectronic integrated circuit.

14. The reconfigurable electrical add/drop multiplexing node of claim 13 , further comprising:

an optical circulators coupled to the receiver section and the transmitter section for interleaving of the N channels for bidirectional transmission over a single fiber.

15. The reconfigurable electrical add/drop multiplexing node of claim 1 , wherein the switching fabric comprises a partially non-blocking, scalable, Torus architecture.

16. The reconfigurable electrical add/drop multiplexing node of claim 15 , wherein the partially non-blocking, scalable, Torus architecture comprises a three-dimensional structure of an X-plane, a Y-plane, and a Z-plane.

17. The reconfigurable electrical add/drop multiplexing node of claim 16 , wherein:

the X-plane is implemented utilizing one of the optoelectronic integrated circuit, a vertical-cavity surface-emitting laser transmitter and receiver, and a combination thereof;

the Y-plane is implemented utilizing intra-shelf communications; and

the Z-plane is implemented utilizing one of the optoelectronic integrated circuit, a vertical-cavity surface-emitting laser transmitter and receiver, and a combination thereof.

18. An optoelectronic integrated circuit, comprising:

a complementary metal-oxide-semiconductor die comprising:

a transmitter section comprising N channels each at a wavelength within a transparency spectrum of optical fiber with adaptation of the wavelength based on its value therein;

a receiver section configured to receive each of the N channels optically and provide corresponding electrical signals based thereon;

a first multiplexing structure for the transmitter section to combine the N channels into a composite signal level;

a first demultiplexing structure for the receiver section to split the N channels from the composite signal level;

a first portion of a switching fabric communicatively coupled to the receiver section; and

a second portion of the switching fabric communicatively coupled to the transmitter section, wherein the switching fabric performs switching at a full signal level performing flow switching of composite signals;

wherein the transmitter section comprises N lasers locked to a wavelength grid, and N modulators and drivers associated with each of the N lasers, and wherein the N modulators comprise one of a Mach-Zehnder modulator, an electro-absorption modulator, and a ring modulator with associated bandwidth, extinction ratio, and chirp control; and

wherein the receiver section comprises a polarization splitter, a horizontal demultiplexer coupled to the polarization splitter, a vertical demultiplexer coupled to the polarization splitter, photodiodes each coupled to one of the horizontal demultiplexer and the vertical demultiplexer, and transimpedance amplifiers each coupled to one of the photodiodes.

19. A reconfigurable electrical add/drop multiplexing node, comprising:

an optoelectronic integrated circuit comprising a transmitter section and a receiver section; and

a switching fabric communicatively coupling the transmitter section and the receiver section of the optoelectronic integrated circuit, wherein the transmitter section and the receiver section interface the switching fabric at a full signal level and the switching fabric is configured to perform flow switching on the full signal level between the transmitter section and the receiver section with subrate grooming of the full signal performed in a separate device external to the optoelectronic integrated circuit;

wherein the transmitter section comprises N channels with adaptation of a wavelength based on its value therein, wherein the receiver section is configured to receive each of the N channels optically and provide corresponding electrical signals based thereon, and

wherein the switching fabric comprises a partially non-blocking, scalable, Torus architecture, wherein the partially non-blocking, scalable, Torus architecture is a three-dimensional structure of an X-plane, a Y-plane, and a Z-plane, and wherein:

the X-plane is implemented utilizing one of the optoelectronic integrated circuit, a vertical-cavity surface-emitting laser transmitter and receiver, and a combination thereof,

the Y-plane is implemented utilizing intra-shelf communications, and

the Z-plane is implemented utilizing one of the optoelectronic integrated circuit, a vertical-cavity surface-emitting laser transmitter and receiver, and a combination thereof.