Optical cable with indicator

• US 6,798,956 B2
• Filed: 07/16/2002
• Issued: 09/28/2004
• Est. Priority Date: 07/16/2002
• Status: Expired due to Fees

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Morrison, John M.
• Primary Examiner(s): Ullah, Akm Enayet
• Assistant Examiner(s): STAHL, MICHAEL J
• Application Number:
  US10/197,509
• Publication Number:
  US 20040146254A1
• Time in Patent Office: 805 Days
• Field of Search: 385/100, 385/101, 385/106, 385/112, 385/147, 385/125, 385/128, 385/12, 385/13, 174/47, 174/8, 174/11.R, 174/25.R, 250/227.15, 250/227.16, 738/00
• US Class Current: 385/100
• CPC Class Codes: G02B 6/562 locatable, e.g. using magnetic means

Abstract

Networks may include optical cables to transmit data between various devices in the network. Indicators positioned on or within optical cables may be used to identify cables that have been compromised during installation, movement and/or use of the cables. Indicators may reduce a network downtime by decreasing the time needed to identify compromised cables. In some embodiments, indicators may change color and/or emit light to indicate that an optical cable has been compromised.

Claims

1. A cable comprising:

an optical fiber having a maximum bend radius;

an indicator coupled to the optical fiber; and

wherein the indicator is activated if a portion of the optical fiber has exceeded the maximum bend radius of the optical fiber;

wherein the indicator comprises;

a first conduit comprising a first fluid; and

a second conduit comprising a second fluid, wherein the first fluid and the second fluid are allowed to mix after the maximum bend radius of the optical fiber has been exceeded.

2. The system as recited in claim 1, further comprising cladding surrounding the optical fiber, wherein at least a portion of the first conduit is positioned in the cladding and wherein at least a portion of the first conduit forms a section of a wall of the cladding.

3. The system as recited in claim 1, wherein the mixing of the first fluid and the second fluid alters a color in the first conduit.

4. The system as recited in claim 1, further comprising cladding, and wherein the first conduit surrounds at least a portion of the cladding.

5. The system as recited in claim 1, wherein at least a portion of the first conduit is translucent.

6. A cable comprising:

an optical fiber having a maximum bend radius;

an indicator coupled to the optical fiber; and

wherein the indicator is activated if a portion of the optical fiber has exceeded the maximum bend radius of the optical fiber;

wherein the indicator comprises a first cladding proximate the optical fiber and a second cladding surrounding the first cladding, wherein the second cladding comprises;

a first fluid;

a conduit positioned in the second cladding wherein the conduit comprises a second fluid; and

a translucent portion.

7. A cable system, comprising:

an optical fiber;

a first conduit comprising a first fluid coupled to the optical fiber;

a second conduit comprising a second fluid, wherein the second conduit is postionable within the first conduit; and

wherein the second conduit allows the first fluid and the second fluid to mix if a portion of the optical fiber has been compromised.

8. The system as recited in claim 7, wherein the second fluid comprises a dye.

9. The system as recited in claim 7, wherein the second fluid comprises an activator.

10. The system as recited in claim 7, wherein the first fluid comprises a fluorophore.

11. The system as recited in claim 7, wherein the first fluid comprises an emitting species or a precursor to an emitting species.

12. The system as recited in claim 7, wherein the first fluid or second fluid comprises a pH indicator.

13. The system as recited in claim 7, wherein the first fluid or second fluid comprises an acidic solution or a basic solution.

14. The system as recited in claim 7, wherein the second conduit is configured to break at a bend radius equal to about the maximum bend radius of the optical fiber.

15. The system as recited in claim 7, wherein the optical fiber is compromised when a portion of the optical cable is bent beyond a maximum bend radius.

16. The system as recited in claim 7, further comprising cladding surrounding the optical fiber, and wherein the first conduit surrounds at least a portion of the cladding.

17. A network system, comprising:

one or more cables, wherein a cable of the one or more cables comprises;

a transmission medium;

a first conduit comprising a first fluid;

a second conduit comprising a second fluid;

an indicator configured to be activated if a portion of the cable is compromised resulting in the first fluid and the second fluid mixing; and

at least two network devices, wherein a first one of the network devices is configured to transmit data to a second one of the network devices over the transmission medium.

18. The system as recited in claim 17, wherein the cable is compromised when a portion of the cable is bent beyond a maximum bend radius.

19. The system as recited in claim 17, wherein the network system comprises a storage area network (SAN), and wherein one of the network devices comprises a storage device.

20. A method comprising:

monitoring a network system that connects components via a plurality of optical cables, each optical cable including a respective indicator, wherein each indicator is configured to be activated if a portion of its respective cable is compromised, wherein each said indicator is configured to activate upon bending a first conduit of the indicator and breaking a second conduit of the indicator upon application of a force sufficient to bend its respective cable such that a maximum bend radius of the cable is exceeded;

detecting a transmission error within the network system;

locating one or more of the optical cables having an activated indicator; and

replacing the one or more of the optical cables having an activated indicator.

21. The method as recited in claim 20, wherein breaking the second conduit further comprises mixing a fluid from the second conduit with a fluid within the first conduit thereby causing the first fluid or second fluid to change color.

22. A cable, comprising:

a transmission medium;

an indicator coupled to the transmission medium; and

wherein the indicator is activated if a portion of the cable system is subjected to a physical stress condition sufficient to damage the transmission medium;

wherein the indicator comprises;

comprising a first fluid; and

a second conduit comprising a second fluid, wherein the first fluid and the second fluid are allowed to mix if a portion of the cable system is subjected to a physical stress condition sufficient to damage the transmission medium.