Active optical cable with integrated eye safety

• US 7,445,389 B2
• Filed: 04/10/2006
• Issued: 11/04/2008
• Est. Priority Date: 04/10/2006
• Status: Active Grant

• Current Assignee: II-VI Delaware, Inc. (Coherent Corp.)
• Original Assignee: Finisar Corporation (II-VI Incorporated)
• Inventors: Aronson, Lewis B.
• Primary Examiner(s): KIM, ELLEN E
• Application Number:
  US11/401,803
• Publication Number:
  US 20070237463A1
• Time in Patent Office: 939 Days
• Field of Search: 385/88, 385/89
• US Class Current: 385/88
• 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
• CPC Class Codes: G02B 6/4416 Heterogeneous cables

Abstract

An active cable that is configured to communicate over much of its length using one or more optical fibers, and that includes an integrated electrical connector at at least one end. The active cable includes an integrated eye safety controls to thereby reduce the chance of injury should the active cable be severed, or otherwise unplugged at an optical end, if any. The cable may be an electrical to optical cable, and electrical to electrical cable, or one of many other potential configurations.

Claims

1. An integrated cable comprising:

a first optical fiber within the integrated cable;

a first opto-electrical transducer within the integrated cable and coupled to a first end of the first optical fiber such that when a first optical signal is present on the first optical fiber, the first opto-electrical transducer receives the first optical signal and converts the first optical signal into a first electrical signal;

a first electrical connector integrated with the integrated cable and coupled to the first opto-electrical transducer such that when the first optical signal is received by the first opto-electrical transducer, the first electrical connector receives the first electrical signal, wherein the first electrical connector is sized to releasably connect with a first electrical port external to the cable such that when connected to the first electrical port and when the first electrical signal is present on the first electrical connector, the first electrical signal is provided to the first electrical port; and

means for disabling or reducing power of one or more optical transmitter within the integrated cable if the first optical fiber of the integrated cable is physically severed.

2. An integrated cable in accordance with claim 1, further comprising:

a protective coating configured to surround the first optical fiber, the first opto-electrical transducer and at least portions of the first electrical connector.

3. An integrated cable in accordance with claim 1, further comprising:

a first electro-optical transducer within the integrated cable and coupled to the first electrical connector such that when a second electrical signal is applied to the first electrical connector, the first electro-optical transducer receives the second electrical signal and converts the second electrical signal into a second optical signal; and

a second optical fiber within the integrated cable and coupled to the first electro-optical transducer such that when the second electrical signal is present on the first electrical connector, the second optical fiber receives the second optical signal from the first electro-optical transducer at a first end of the second optical fiber.

4. A cable as in claim 3, wherein when optical signals are transmitted over both the first optical fiber and the second optical fiber, the integrated cable has a full duplex connection, the integrated cable further comprising:

a mechanism to reduce optical power whenever a full duplex connection is not confirmed.

5. A cable as in claim 3, wherein when optical signals are transmitted over both the first optical fiber and the second optical fiber, the integrated cable has a full duplex connection, the integrated cable further comprising:

a mechanism to keep the optical power off until the presences of a full duplex connection is verified.

6. A cable as in claim 3, wherein when optical signals are transmitted over both the first optical fiber and the second optical fiber, the integrated cable has a full duplex connection, the integrated cable further comprising:

a mechanism to verify the full duplex connection by transmitting and receiving a relatively lower optical power level within Class 1 eye safety limits over either or both of the first optical fiber and the second optical fiber.

7. An integrated cable in accordance with claim 3, further comprising:

a second opto-electrical transducer within the integrated cable and coupled to a second end of the second optical fiber such that when a third optical signal is present on the second optical fiber, the second opto-electrical transducer receives the third optical signal and converts the third optical signal into a third electrical signal;

a second electrical connector integrated with the integrated cable and coupled to the second opto-electrical transducer such that when the third optical signal is received by the second opto-electrical transducer, the second electrical connector receives the third electrical signal, wherein the second electrical connector is sized to connect with a second electrical port external to the cable such that when connected to the second electrical port and when the third electrical signal is present on the second electrical connector, the third electrical signal is provided to the second electrical port; and

a second electro-optical transducer within the integrated cable and coupled to the second electrical connector such that when a fourth electrical signal is applied to the second electrical connector, the second electro-optical transducer receives the fourth electrical signal and converts the fourth electrical signal into a fourth optical signal,

wherein the first optical fiber is coupled to the second electro-optical transducer such that when the fourth electrical signal is present on the second electrical connector, the first optical fiber receives the fourth optical signal from the second electro-optical transducer at a second end of the first optical fiber.

8. An integrated cable in accordance with claim 1, wherein the first electrical connector further includes a connection for a loss of signal (LOS) indication.

9. An integrated cable in accordance with claim 1, wherein the first electrical connector further includes a connection for a fault indication.

10. An integrated cable in accordance with claim 1, wherein the first electrical connector further includes a connection for a link disable control signal.

11. An integrated cable in accordance with claim 1, wherein the first electrical connector further includes a connection to indicate the presence of the integrated cable to a host system that is associated with the first electrical port.

12. An integrated cable in accordance with claim 1, wherein the mechanism comprises:

a mechanism to transmit optical power to eye safe levels if the first optical fiber of the integrated cable is physically severed.

13. An integrated cable in accordance with claim 1, further comprising:

a mechanism to assert a fault signal if the first optical fiber of the integrated cable is severed.

14. An integrated cable in accordance with claim 1, wherein the integrated cable supports data rates of between 1 to 11.5 gigabits per second, inclusive.

15. An integrated cable in accordance with claim 1, wherein a length of the integrated cable is between 1 and 30 meters.

16. An integrated cable in accordance with claim 1, wherein the integrated cable has an optical connection at a second end of the integrated cable to thereby form a first E-O cable, the integrated cable being part of a sequence of cables including the first E-O cable at a first end of the sequence, a second E-O cable at the second end of the sequence, and one or more optical cables between the first and second E-O cables.

17. An integrated cable in accordance with claim 1, wherein the integrated cable has an optical connection at a second end of the integrated cable, wherein the optical connection is sized to be coupled to an optical transceiver.

18. An integrated cable in accordance with claim 1, wherein the integrated cable has a second electrical connector at a second end of the integrated cable to thereby form a first E-E cable, the electrical connection being sized to connect with a receptacle of a cable plug end adaptor.

19. An integrated cable in accordance with claim 1, wherein the integrated cable has a second electrical connector at a second end of the integrated cable to thereby form a first E-E cable, the first electrical connector being a male connector, and second electrical connector being a female connector configured to receive an electrical connector that is sized and shaped the same as the first electrical connector.

20. An integrated cable comprising:

a first electro-optical transducer within the integrated cable and coupled to the first electrical connector such that when a first electrical signal is applied to the first electrical connector, the first electro-optical transducer receives the first electrical signal and converts the first electrical signal into a first optical signal;

a first optical fiber within the integrated cable and coupled to the first electro-optical transducer such that when the first electrical signal is present on the first electrical connector, the first optical fiber receives the first optical signal from the first electro-optical transducer at a first end of the first optical fiber; and

a mechanism to disable or reduce power of one or more optical transmitter within the integrated cable if the first optical fiber of the integrated cable is physically severed.