Apparatus and method for tapping optical transmissions for analysis of optical protocols

• US 6,088,497 A
• Filed: 09/30/1998
• Issued: 07/11/2000
• Est. Priority Date: 09/30/1998
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Pimpinella, Richard Joseph, Phillips, Wade Charles
• Primary Examiner(s): Palmer, Phan T. H.
• Application Number:
  US09/163,944
• Time in Patent Office: 650 Days
• Field of Search: 385/15, 385/16, 385/24, 385/39, 385/48, 385/134-139
• US Class Current: 385/48
• CPC Class Codes: G02B 6/28 having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
• CPC Class Codes: G02B 6/2804 forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
• CPC Class Codes: G02B 6/4452 Distribution frames
• CPC Class Codes: G02B 6/44524 with frame parts or auxiliary devices mounted on the frame and collectively not covering a whole width of the frame or rack cassettes G02B6/4453
• CPC Class Codes: H04B 10/079 using measurements of the data signal

Abstract

A system and associated method for use in a fiber administration system that establishes optical communication links. The system includes an optical tap that is disposed in each optical fiber pathway contained within the optical communication links. The optical taps are contained within modules that can be selectively added or removed from a shelf casing that is sized to fit within the framework of the fiber administration system. An optical switch is present in each shelf casing that holds the tap modules. The optical switch is connected to each of the optical taps on its shelf and receives the tapped optical signal provided by the optical taps. An optical signal analyzer is provided within the framework of the fiber administration system. The optical signal analyzer is interconnected with the optical switches on each shelf that contains a tap module. The optical switches selectively interconnect the optical signal analyzer to any of the optical taps.

Claims

1. An apparatus for testing optical signals in an optical communications link, said apparatus comprising:

a plurality of optical taps for tapping the optical signal from each optical communications link;

at least one optical switch coupled to said plurality of optical taps; and

at least one optical protocol analyzer coupled to said at least one optical switch, wherein said at least one optical switch selectively connects each optical protocol analyzer to one of said plurality of optical taps.

2. The apparatus according to claim 1, further including a plurality of tap modules, wherein each of said tap modules contains at least two of said plurality of optical taps.

3. The apparatus according to claim 2, further including at least one test shelf for selectively retaining at least some of said plurality of tap modules.

4. The device according to claim 3, wherein an optical switch is disposed within each said test shelf, wherein said optical switch is connected to each of said plurality of optical taps contained within said tap modules on that test shelf.

5. A fiber administration system for establishing optical communication links, via optical fiber pathways between different locations, said system comprising:

an optical tap disposed in each optical fiber pathway;

an optical switch coupled to an optical tap in a plurality of different optical fiber pathways;

an optical signal analyzer coupled to said optical switch, wherein said optical switch selectively interconnects said optical signal analyzer to an optical tap coupled to said optical switch.

6. The system according to claim 5, wherein said fiber administration system includes a frame, at least one bay within said frame and a plurality of shelves in said bays.

7. The system according to claim 6, wherein each said optical tap is contained within a tap module, wherein each tap module is retained in one of said plurality of shelves.

8. The system according to claim 7, wherein two optical taps are disposed within each tap module.

9. The system according to claim 7, wherein a plurality of tap modules are retained in at least some of said plurality of shelves.

10. The system according to claim 9, wherein an optical switch is contained on each of said plurality of shelves that contain a tap module, wherein the optical switch on the shelf is coupled to the optical tap contained within the tap modules on that shelf.

11. The system according to claim 5, wherein said optical signal analyzer is an optical protocol analyzer.

12. The system according to claim 5, further including a programmable controller coupled to said optical switch for selectively causing said optical signal analyzer to receive an optical signal from one of said optical taps.

13. A test shelf assembly for use in an optical fiber administration system, comprising:

a plurality of tap modules, wherein each said tap module is cable of tapping a portion of at least one optical signal passing therethrough;

shelf casing capable of selectively receiving and retaining said plurality of tap modules;

an optical switch positioned within said shelf casing, wherein said optical switch receives the tapped portion of the optical signal produced by each of said plurality of tap modules.

14. The assembly according to claim 13 wherein each tap module contains two optical taps.

15. A method of monitoring optical signals in a plurality of optical communications links, said method comprising the steps of:

tapping a portion of the optical signal from each of the optical communication links;

coupling the tapped portion of each optical signal to an optical switch;

coupling the optical switch to an optical protocol analyzer, wherein said optical protocol analyzer receives the tapped portion of an optical signal directed to it by said optical switch.

16. The method according to claim 15, wherein said step of tapping a portion of the optical signal from each of the optical communication links, includes directing each optical communications link through an optical module, wherein each optical module contains an optical tap for tapping a portion of the optical signal in each direction of travel.

17. The method according to claim 16, wherein said step of tapping a portion of the optical signal includes positioning at least one optical tap in each of said optical communication links.