Fiber optic receptacle and plug assembly including alignment sleeve insert

• US 7,244,066 B2
• Filed: 09/21/2005
• Issued: 07/17/2007
• Est. Priority Date: 02/25/2005
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Theuerkorn, Thomas
• Primary Examiner(s): HAHM, SARAH UH YOUNG
• Application Number:
  US11/231,837
• Publication Number:
  US 20060193562A1
• Time in Patent Office: 664 Days
• Field of Search: 385/55, 385/60, 385/70, 385/72, 385/76, 385/78
• US Class Current: 385/53
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3831 comprising a keying element on the plug or adapter, e.g. to forbid wrong connection keying element on the ferrule G02B6/3851; keying element for electrical coupling H01R13/64
• CPC Class Codes: G02B 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3869 Mounting ferrules to connector body, i.e. plugs
• CPC Class Codes: G02B 6/3874 using tubes, sleeves to align ferrules
• CPC Class Codes: G02B 6/3878 comprising a plurality of ferrules, branching and break-out means
• CPC Class Codes: G02B 6/3879 Linking of individual connector plugs to an overconnector, e.g. using clamps, clips, common housings comprising several individual connector plugs
• CPC Class Codes: G02B 6/38875 Protection from bending or twisting
• CPC Class Codes: G02B 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/3893 Push-pull type, e.g. snap-in, push-on
• CPC Class Codes: G02B 6/3894 Screw-lock type
• CPC Class Codes: G02B 6/545 Pulling eyes G02B6/475 takes precedence

Abstract

A fiber optic receptacle and plug assembly includes a fiber optic receptacle adapted to be mounted within a connector port of a network connection terminal and a fiber optic plug mounted upon an end of a fiber optic cable, wherein the fiber optic receptacle and the fiber optic plug comprise complimentary alignment and keying features that allow the fiber optic receptacle to receive only a fiber optic plug of like ferrule configuration. The fiber optic receptacle includes an alignment sleeve insert operable for receiving and optically connecting at least one receptacle ferrule and at least one opposing plug ferrule. The receptacle is suitable for use in enclosures requiring a minimal receptacle penetration depth, wherein the fiber optic receptacle comprises a shoulder that is secured against an inner wall of the enclosure to provide strain relief against cable-pulling forces of up to about 600 lbs.

Claims

1. A fiber optic receptacle and plug assembly, comprising:

a fiber optic receptacle having a first end and a second end opposite the first end and defining an interior cavity opening through the first end and the second end;

an alignment sleeve insert disposed within the interior cavity adjacent the first end and comprising at least one alignment sleeve operable for receiving at least one receptacle ferrule from the second end;

a fiber optic plug mounted upon an end of a fiber optic cable and comprising at least one plug ferrule;

wherein the plug ferrule is received within the alignment sleeve opposite the receptacle ferrule when the plug is mated with the receptacle in a predetermined orientation; and

wherein the receptacle defines a key, the alignment sleeve insert defines a first key slot, and the plug defines a second key slot, and wherein the key is configured to be received within the first key slot and the second key slot when the plug is mated with the receptacle.

2. The fiber optic receptacle and plug assembly of claim 1, wherein the plug further comprises a plug insert and the second key slot is disposed on the plug insert.

3. The fiber optic receptacle and plug assembly of claim 1, wherein the alignment sleeve insert comprises an alignment sleeve holder for receiving the alignment sleeve and wherein the key ensures that only a plug ferrule of like configuration is received within the alignment sleeve when the plug is mated with the receptacle.

4. The fiber optic receptacle and plug assembly of claim 1, wherein the fiber optic receptacle and the fiber optic plug are universal and operable to interconnect any type of optical connector comprising any configuration of opposing ferrules.

5. The fiber optic receptacle and plug assembly of claim 1, wherein the alignment sleeve insert and a corresponding plug insert disposed within the plug may be interchanged to accommodate a specific connector type having a predetermined configuration.

6. The fiber optic receptacle and plug assembly of claim 1, wherein the alignment sleeve insert is inserted into and removed from the interior cavity through the first end of the receptacle.

7. The fiber optic receptacle and plug assembly of claim 1, wherein the alignment sleeve insert is molded into the receptacle.

8. The fiber optic receptacle and plug assembly of claim 1, wherein the receptacle comprises a receptacle housing defining a first end, a second end, a shoulder portion disposed medially between the first end and the second end, and a threaded portion at least partially between the first end and the shoulder and wherein the plug comprises a threaded coupling nut for engaging the threaded portion of the receptacle to secure the shoulder against an inner surface of a wall of a connection terminal.

9. The fiber optic receptacle and plug assembly of claim 1, wherein the receptacle ferrule and the plug ferrule are each selected from the group consisting of SC, LC, MTRJ, MTP, SC-DC and APC ferrules.

10. A fiber optic receptacle and plug assembly, comprising:

a fiber optic receptacle adapted to be mounted within an opening formed through a wall of a connection terminal, the receptacle comprising;

a receptacle housing defining an interior cavity opening through opposed first and second ends, the receptacle housing comprising an alignment feature and a shoulder operable for securing the receptacle against an inner surface of the wall of the connection terminal; and

an alignment sleeve insert defining a first complimentary alignment feature and comprising at least one alignment sleeve for receiving at least one receptacle ferrule; and

a fiber optic plug adapted to be mated with the receptacle, the plug comprising;

a plug housing defining a second complimentary alignment feature; and

at least one plug ferrule received within the alignment sleeve opposite the receptacle ferrule when the plug is mated with the receptacle;

wherein the alignment feature, the first complimentary alignment feature and the second complimentary alignment feature ensure that the plug ferrule and the receptacle ferrule are positioned in a predetermined orientation when the plug is mated to a receptacle of like ferrule configuration; and

wherein the alignment feature is a key and wherein the first complimentary alignment feature and the second complimentary alignment feature are key slots configured for receiving the key such that the receptacle ferrule and the plug ferrule are received within the alignment sleeve in a predetermined orientation.

11. The fiber optic receptacle and plug assembly of claim 10, wherein the alignment feature is also a keying feature that prevents the alignment sleeve of the receptacle from receiving a plug ferrule having a configuration that is unlike the configuration of the receptacle ferrule.

12. The fiber optic receptacle and plug assembly of claim 10, wherein the alignment sleeve insert and a corresponding plug insert disposed within the plug may be interchanged to accommodate a specific connector type having a predetermined configuration.

13. The fiber optic receptacle and plug assembly of claim 10, wherein the alignment sleeve insert is inserted into and removed from the interior cavity through the first end of the receptacle housing.

14. The fiber optic receptacle and plug assembly of claim 10, wherein the alignment sleeve insert is molded into the receptacle.

15. The fiber optic receptacle and plug assembly of claim 10, wherein the receptacle housing defines a shoulder portion disposed medially between the first end and the second end, and a threaded portion at least partially between the first end and the shoulder and wherein the plug comprises a threaded coupling nut for engaging the threaded portion of the receptacle to secure the shoulder against an inner surface of a wall of a connection terminal.

16. The fiber optic receptacle and plug assembly of claim 10, wherein the receptacle ferrule and the plug ferrule are each selected from the group consisting of SC, LC, MTRJ, MTP, SC-DC and APC ferrules.

17. An optical connector comprising:

a fiber optic receptacle having a first end and a second opposite the first, the receptacle defining an interior cavity opening through the first end and the second end, the receptacle comprising an alignment feature disposed within the interior cavity and an alignment sleeve insert adjacent the first end including at least one alignment sleeve for receiving at least one receptacle ferrule inserted through the second end, the alignment sleeve defining a first complimentary alignment feature for engaging the alignment feature to ensure that the alignment sleeve insert is positioned at a predetermined orientation relative to the receptacle;

a fiber optic plug having at least one plug ferrule that is received within the alignment sleeve when the plug is mated with the receptacle, the plug defining a second complimentary alignment feature for engaging the alignment feature to ensure that the plug is positioned at a predetermined orientation relative to the receptacle.

18. The optical connector of claim 17, wherein the alignment feature is a key and the first complimentary alignment feature and the second complimentary alignment feature are key slots for receiving the key and wherein the plug ferrule is positioned at a predetermined orientation relative to the receptacle ferrule when the plug is mated with the receptacle.