Monolithic active optical cable assembly for data device applications and various connector types

• US 20080044141A1
• Filed: 08/21/2006
• Published: 02/21/2008
• Est. Priority Date: 08/21/2006
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Intel Corporation
• Inventors: Hayek, George, Willis, Thomas G., Downing, Sylvia, Chin, Jesse, Wang, William H., Crews, Darren S., Kim, Brian H.
• Granted Patent: US 7,371,014 B2
• Time in Patent Office: Days
• US Class Current: 385/88
• CPC Class Codes: G02B 6/3887 Anchoring optical cables to connector housings, e.g. strain relief features
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4204 the coupling comprising intermediate optical elements, e.g. lenses, holograms encapsulated active devices H01S5/02208, H01L33/52
• CPC Class Codes: G02B 6/423 using guiding surfaces for the alignment
• CPC Class Codes: G02B 6/4246 Bidirectionally operating package structures
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

A monolithic cable assembly includes a communication cable and cable connectors coupled to either end of the communication cable. The communication cable includes at least one optical communication channel. The cable connectors include a physical end connector for electrically coupling to a data device connector, optoelectronic components for converting data signals between an electrical realm and an optical realm, and a passively aligned integrated lens cover. The integrated lens cover includes at least one optical pathway for coupling optical data signals between the at least one optical communication channel and the optoelectronic components.

Claims

1. An apparatus, comprising:

a communication cable including at least one optical communication channel; and

cable connectors coupled to either end of the communication cable, wherein the communication cable and the cable connectors form a monolithic cable assembly, each of the cable connectors including;

a physical end connector for electrically coupling to a data device connector;

optoelectronic components for converting data signals between an electrical realm and an optical realm; and

a passively aligned integrated lens cover disposed over at least a portion of the optoelectronic components, the integrated lens cover including at least one optical pathway for coupling optical data signals between the at least one optical communication channel and the optoelectronic components, wherein the cable connectors to connect to a data device connector of a data device including a control logic to alter a communication protocol of signals generated by the data device, the signals altered based on whether the monolithic cable assembly including the optoelectronic components or an electrical cable assembly without active optoelectronic components is coupled to the data device connector, the data device not included in a transceiver or multiplexer to transmit or receive optical signals.

2. The apparatus of claim 1, wherein the physical end connector comprises a plug compliant with a CX4 Infiniband plug.

3. The apparatus of claim 1, wherein the physical end connector comprises a physical connector compliant with a connector selected from a group consisting of a CX12 connector, a Medium Dependent Interface (“

MDI”

) connector, an XPAK Ethernet connector, a XENPAK Ethernet network physical access connector, an X2 connector, a MicroGiGaCN connector, a LaneLink connector, a Small Form-Factor Pluggable (“

SFP”

) connector, an SFP Plus (“

SFP+”

) connector, a 10 Gigabit Small Form-Factor Pluggable (“

XFP”

) connector, a Quad Small Form-Factor Pluggable (“

QSFP”

) connector, a Serial Advanced Technology Attachment (“

SATA”

) connector, a Serial Attached Small Computer System Interface (“

SAS”

) connector, a MiniSAS connector, a DisplayPort connector, a Unified Display Interface (“

UDI”

) connector, a Registered Jack 45 (“

RJ-45”

) connector, a 12 channel optical pluggable module multi-source agreement (SNAP 12 MSA) connector, a 100 pin matrix array connector, an Optocube connector, and a coaxial cable connector.

4. The apparatus of claim 1, wherein the physical end connector includes an internal power pin to provide power to the optoelectronic components.

5. The apparatus of claim 4, wherein the internal power pin is configured to communicate electronic data signals modulated over a direct current (“

DC”

) power signal.

6. The apparatus of claim 1, further comprising at least one electrical communication channel included within the communication cable, wherein the physical end connector of one of the cable connectors is coupled to provide power via the at least one electrical communication channel to the other one of the cable connectors.

7. The apparatus of claim 1, wherein the optoelectronic components include:

at least one optical source coupled to generate first optical data signals;

transmitter circuitry coupled to drive the at least one optical source in response to first electrical data signals;

at least one optical detector coupled to receive second optical data signals; and

receiver circuitry coupled to the at least one optical detector to output second electrical data signals in response to the at least one optical detector.

8. The apparatus of claim 7, wherein the transmitter circuitry includes a serializer to serialize two or more of the first electrical data signals for communication onto one or more optical waveguides, and wherein the receiver circuitry includes a deserializer.

9. The apparatus of claim 1, wherein at least one of the optoelectronic components is integrated as at least one bare die without a chip package passively aligned to a substrate, wherein the integrated lens cover protects the at least one bare die from contamination.

10. The apparatus of claim 1, further comprising:

an alignment frame including at least one socket and at least one alignment structure to passively align the at least one optical pathway to both the optoelectronic components and the at least one optical communication channel, wherein the at least one socket enables coarse passive alignment and the at least one alignment structure enables precise passive alignment.

11. The apparatus of claim 1, further comprising at least one reflector embedded within the integrated lens cover to couple the optical data signals between the at least one optical communication channel and the optoelectronic components.

12. The apparatus of claim 1, wherein the optoelectronic components include a plurality of optical sources physically integrated into a first monolithic array die, wherein the optoelectronic components further include a plurality of optical detectors physically integrated into a second monolithic array die.

13. A method, comprising:

using a control logic in a data device to alter a communication protocol of data signals generated by the data device, the signals altered based on whether a monolithic cable assembly including optoelectronic components or an electrical cable without optoelectronic components is coupled to a data device connector coupled to the data device, the data device not included in a transceiver or multiplexer to transmit or receive optical signals;

receiving first electrical data signals via the data device connector of the data device at a first cable connector of the monolithic cable assembly;

converting at least a portion of the electrical data signals into optical data signals via first optoelectronic components disposed within the first cable connector;

launching the optical data signals into at least one optical communication channel passively aligned with the first optoelectronic components;

guiding the optical data signals from the first cable connector to a second cable connector of the monolithic cable assembly via the at least one optical communication channel; and

converting the optical data signals to second electrical data signals via second optoelectronic components disposed within the second cable connector.

14. The method of claim 13, wherein the monolithic cable assembly is used for a data device application selected from a group consisting of a blade-to-blade interconnect, a chip-to-chip interconnect, a CPU-to-CPU interconnect, a CPU-to-memory interconnect, a CPU-to-graphics chip interconnect, an input/output (“

I/O”

) interconnect, an optical backplane interconnect, a data acquisition application, a radio frequency (“

RF”

) application, a Cable Television (“

CATV”

) interconnect, an Ethernet interconnect, an Infiniband interconnect, a Myrinet interconnect, a QsNet interconnect, virtualization of multiple I/O streams applications, a serial advanced technology attachment (“

SATA”

) interconnect, a serial attached small computer system interface (“

SAS”

) interconnect, an Internet Small Computer System Interface (“

iSCSI”

) interconnect, a Fibre Channel interconnect, an Advanced Switching Interconnect (“

ASI”

), a Peripheral Component Interconnect (“

PCI”

) Express interconnect, a Common System Interface (“

CSI”

) interconnect, and a HyperChannel interconnect.

15. The method of claim 13 wherein the electrical data signals and the optical data signals comprise analog signals.

16. The method of claim 13, wherein converting at least the portion of the electrical data signals into the optical data signals comprises converting a first portion of the electrical data signals into the optical data signals, the method further comprising:

communicating a second portion of the electrical data signals from the first cable connector to the second cable connector of the monolithic cable assembly via at least one electrical communication channel.

17. The method of claim 16, wherein the second portion of the electrical data signals comprises one of slow-speed electrical signals relative to the first portion or clock signals.

18. The method of claim 13, further comprising determining whether an electrical cable assembly or an optical cable assembly is coupled to a data device connector.

19. The method of claim 18, further comprising:

generating the first electrical data signals based on a first communication protocol, if the electrical cable assembly is coupled to the data device connector; and

generating the first electrical data signals based on a second communication protocol, if the optical cable assembly is coupled to the data device connector.

20. The method of claim 13, further comprising providing power to the first cable connector via a pin within a physical end connector of the first cable connector to power the first optoelectronic components.

21. A system, comprising:

a communication cable including at least one optical communication channel;

cable connectors coupled to either end of the communication cable, wherein the communication cable and the cable connectors form an active optical monolithic cable assembly; and

a first device embedded within a processing system and coupled to one of the cable connectors, wherein the first device is configured to generate signals and to alter the signals to be transmitted over the active optical monolithic cable assembly dependent upon a determination by control logic whether an electrical cable assembly or the active optical monolithic cable assembly is coupled to the first device, the first device not included in a transceiver or multiplexer to receive or transmit optical signals.

22. The system of claim 21, wherein each of the cable connectors includes:

a physical end connector for electrically coupling to a data device connector;

optoelectronic components for converting data signals between an electrical realm and an optical realm; and

a passively aligned integrated lens cover disposed over at least a portion of the optoelectronic components, the integrated lens cover including at least one optical lens for coupling optical signals between the at least one optical communication channel and the optoelectronic components.

23. The system of claim 21, wherein the first device comprises a video graphics unit, the system further comprising a display unit coupled to the other one of the cable connectors.

24. The system of claim 23, wherein the video graphics unit is coupled to generate first electrical data signals based on a first communication protocol, if the control logic determines that the electrical cable assembly is coupled to the video graphics unit, else to generate the first electrical data signals based on a second communication protocol, if the control logic determines that the optical cable assembly is coupled to the video graphics unit.

25. The system of claim 23, wherein the physical end connector of the one of the cable connectors coupled to the video graphics unit includes a pin to provide power to the optoelectronic components.

26. The system of claim 21, wherein the physical end connector comprises a physical connector compliant with a connector selected from a group consisting of a CX4 connector, a CX12 connector, a Medium Dependent Interface (“

MDI”

) connector, an XPAK Ethernet connector, a XENPAK Ethernet network physical access connector, an X2 connector, a MicroGiGaCN connector, a LaneLink connector, a Small Form-Factor Pluggable (“

SFP”

) connector, an SFP Plus (“

SFP+”

) connector, a 10 Gigabit Small Form-Factor Pluggable (“

XFP”

) connector, a Quad Small Form-Factor Pluggable (“

QSFP”

) connector, a Serial Advanced Technology Attachment (“

SATA”

) connector, a Serial Attached SCSI (“

SAS”

) connector, a MiniSAS connector, a DisplayPort connector, a Unified Display Interface (“

UDI”

) connector, a Registered Jack 45 (“

RJ-45”

) connector, a 12 channel optical pluggable module multi-source agreement (SNAP 12 MSA) connector, a 100 pin matrix array connector, an Optocube connector, and a coaxial cable connector.