Fiber optic receptacle

• US 20030063866A1
• Filed: 09/28/2001
• Published: 04/03/2003
• Est. Priority Date: 09/28/2001
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Cable Systems LLC (Corning Incorporated)
• Inventors: Tran, Hieu V., Melton, Stuart R., Childers, Darrell R.
• Granted Patent: US 6,579,014 B2
• Time in Patent Office: Days
• US Class Current: 385/76
• CPC Class Codes: G02B 6/3825 with an intermediate part, e.g. adapter, receptacle, linking two plugs
• CPC Class Codes: G02B 6/3873 Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
• CPC Class Codes: G02B 6/389 characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock, snap-in, bayonet type

Abstract

A fiber optic receptacle is provided that includes a receptacle housing and an adapter sleeve disposed therewithin and biased toward a first end of the receptacle housing through which a fiber optic plug is inserted. In an embodiment, the fiber optic receptacle includes the adapter sleeve is biased toward a first end of the receptacle housing through which a fiber optic plug is inserted in order to maintain physical contact between front faces of the plug ferrule and the receptacle ferrule without requiring that the fiber optic connector of the fiber optic plug be latched to the adapter sleeve, thereby increasing the float between the respective ferrules. In another embodiment, a fiber optic plug and receptacle assembly is provided in which either the plug or the receptacle includes an alignment stop while the other one includes an alignment feature and a stop feature to ensure alignment of the plug and receptacle and to limit insertion of the plug within the receptacle. A universal receptacle is also provided that defines an internal cavity sized to receive any one of an adapter sleeve configured to receive a plurality of connector types including MTP, MTRJ, SC-DC, SC, DC, Unicam™, LC, and the like.

Claims

1. A fiber optic receptacle comprising:

a receptacle housing defining an internal cavity opening through opposed first end and second end, the receptacle housing adapted to mate with a corresponding fiber optic plug;

an adapter sleeve disposed within the internal cavity defined by the receptacle housing, the adapter sleeve defining a lengthwise extending passage opening through opposed first end and second end for receiving and aligning a receptacle ferrule and a plug ferrule; and

a bias member disposed within the receptacle housing, the bias member operably engaging the adapter sleeve so as to urge the adapter sleeve towards the first end of the receptacle housing, whereby the bias member is configured to floatingly align the receptacle ferrule with the plug ferrule engaged in the adapter sleeve.

2. The fiber optic receptacle according to claim 1, wherein the bias member comprises at least one spring disposed between the second end of the receptacle housing and the adapter sleeve.

3. The fiber optic receptacle according to claim 2, wherein the receptacle housing comprises at least one post extending in a lengthwise direction from an interior surface of the second end towards the first end, wherein each of the at least one spring is mounted upon a respective at least one post.

4. The fiber optic receptacle according to claim 1, wherein the adapter sleeve further comprises:

a lengthwise longitudinally extending sleeve member; and

a pair of wings extending from opposite sides of the sleeve, wherein the pair of wings are engaged by the bias member to urge the adapter sleeve toward the first end of the receptacle housing.

5. The fiber optic receptacle according to claim 1, further comprising:

an adapter retainer comprising opposed first end and second end, wherein the first end of the adapter retainer is adapted to receive a plug body of a fiber optic connector comprising the plug ferrule and wherein the adapter retainer is configured to engage with the adapter sleeve so as to retain the adapter sleeve within the receptacle housing; and

sealing means for preventing moisture and other forms of environmental degradation from entering the adapter retainer engaged with the receptacle housing.

6. The fiber optic receptacle according to claim 5, wherein an interior surface of the first end of the receptacle housing is further configured to engage an exterior surface of the second end of the adapter retainer such that the adapter sleeve is secured between the receptacle housing and the adapter retainer.

7. The fiber optic receptacle according to claim 6, wherein the sealing means comprise a sealing ring placed between the receptacle housing and the adapter retainer.

8. The fiber optic receptacle according to claim 1, further comprising:

an alignment stop disposed in a fixed position upon the receptacle housing, wherein the alignment stop is adapted to engage an alignment feature of a corresponding fiber optic plug to assent alignment of the fiber optic plug with the fiber optic receptacle and wherein the alignment stop is also adapted to contact a stop feature of the fiber optic plug to thereby limit insertion of the fiber optic plug within the fiber optic receptacle.

9. The fiber optic receptacle according to claim 8, wherein the alignment stop further comprises a lengthwise extending pin for engaging a corresponding groove defined by the fiber optic plug.

10. The fiber optic receptacle according to claim 9, wherein the pin has a proximal end connected to the second end of the receptacle housing and an opposed distal end, wherein the pin has a predetermined length, and wherein the distal end of the pin is adapted to contact an end of the corresponding groove defined by the fiber optic plug to limit insertion of the fiber optic plug within the fiber optic receptacle.

11. The fiber optic receptacle according to claim 10, wherein the pin extends alongside at least a portion of the adapter sleeve.

12. The fiber optic receptacle according to claim 1, further comprising:

torsion coupling means for providing torsion relief between a fiber optic cable connected to the receptacle housing, wherein the fiber optic cable comprises a fiber optic plug end and wherein the fiber optic plug end comprises a connector comprising the plug ferrule, the plug ferrule capable of engaging the first end of the adapter sleeve.

13. The fiber optic receptacle according to claim 12, wherein the torsion coupling means comprises at least one torsion coupling pin that couples the fiber optic plug to the fiber optic receptacle.

14. The fiber optic receptacle according to claim 12, wherein the torsion coupling means comprises a key disposed along an exterior surface of the fiber optic plug and a keyway disposed along an interior surface of the first end of the adapter retainer, such that torque applied to the fiber optic cable is transmitted from the fiber optic cable to the fiber optic plug to the fiber optic receptacle thereby providing torque relief for the adapter sleeve and the connector.

15. The fiber optic receptacle of claim 5, wherein the interior surface of the first end of the receptacle housing is threadably configured to engage the exterior surface of the second end of the adapter retainer such that the adapter retainer is capable of being disconnected from the receptacle housing in order to access the adapter sleeve and to access the receptacle ferrule.

16. A fiber optic receptacle comprising:

a receptacle housing defining an internal cavity opening through opposed first and second ends, the receptacle housing adapted to mate with a corresponding fiber optic plug;

an adapter sleeve disposed within the internal cavity defined by the receptacle housing, the adapter sleeve defining a lengthwise extending passage opening through opposed first and second ends for receiving and aligning respective ferrules; and

an alignment stop disposed in a fixed position within the receptacle housing, the alignment stop adapted to engage an alignment feature of the corresponding fiber optic plug to insure alignment of the fiber optic plug with the fiber optic receptacle, the alignment stop also adapted to contact a stop feature of the fiber optic plug to thereby limit insertion of the fiber optic plug within the fiber optic receptacle.

17. The fiber optic receptacle according to claim 16, further comprising a bias member disposed within the receptacle housing, the bias member operably engaging the adapter sleeve so as to urge the adapter sleeve toward the first end of the receptacle housing.

18. The fiber optic receptacle according to claim 17, wherein the bias member comprises at least one spring disposed between the second end of the receptacle housing and the adapter sleeve.

19. The fiber optic receptacle according to claim 18, wherein the receptacle housing comprises at least one post extending in a lengthwise direction from the second end, wherein each spring is mounted upon a respective post.

20. The fiber optic receptacle according to claim 17, wherein the adapter sleeve comprises:

a lengthwise extending sleeve member; and

a pair of wings extending from opposite sides of the sleeve member, wherein the pair of wings are engaged by the bias member to urge the adapter sleeve toward the first end of the receptacle housing.

21. The fiber optic receptacle according to claim 17, further comprising an adapter retainer connected to the receptacle housing proximate the first end thereof, the adapter retainer engaging the adapter sleeve so as to retain the adapter sleeve within the receptacle housing.

22. A fiber optic plug and receptacle assembly comprising:

a fiber optic plug comprising;

a plug body; and

a fiber optic connector disposed within the plug body and comprising a connector housing and a ferrule at least partially disposed within the connector housing;

a fiber optic receptacle for mating with the fiber optic plug, the fiber optic receptacle comprising;

a receptacle housing defining an internal cavity opening through opposed first and second ends; and

an adapter sleeve disposed within the internal cavity defined by the receptacle housing, the adapter sleeve defining a lengthwise extending passage for receiving a portion of the ferrule of the fiber optic plug,

wherein one of the fiber optic plug and the fiber optic receptacle comprises an alignment stop and the other of the fiber optic plug and the fiber optic receptacle comprises an alignment feature and a stop feature, wherein the alignment stop engages the alignment feature to insure alignment of the fiber optic plug and the fiber optic receptacle, and wherein the alignment stop is also adapted to contact the stop feature to thereby limit insertion of the fiber optic plug within the fiber optic receptacle.

23. A fiber optic plug and receptacle assembly according to claim 22, wherein the alignment stop comprises a pin, the alignment feature comprises a groove, and the stop feature comprises a closed end of the groove for engaging a distal end of the pin.

24. A fiber optic plug and receptacle assembly according to claim 23, wherein the fiber optic receptacle comprises the pin having a predetermined length and extending from a proximal end connected to the second end of the receptacle housing to the opposed distal end, wherein the plug body of the fiber optic plug defines the groove for receiving the pin.

25. A fiber optic plug and receptacle assembly according to claim 24,wherein the plug body of the fiber optic plug includes a first end adapted to be inserted into the fiber optic receptacle, wherein both the pin and the corresponding groove extend in a lengthwise direction, and wherein the groove defined by the plug body extends from an open end proximate the first end of the plug body to an opposed closed end that serves as the stop feature.

26. A fiber optic plug and receptacle assembly according to claim 24, wherein the pin extends alongside at least a portion of the adapter sleeve.

27. A fiber optic plug and receptacle assembly according to claim 22, wherein the fiber optic receptacle further comprises a bias member disposed within the receptacle housing, the bias member operably engaging the adapter sleeve so as to urge the adapter sleeve toward the first end of the receptacle housing.

28. A fiber optic plug and receptacle assembly according to claim 27, wherein the adapter sleeve comprises:

a lengthwise extending sleeve member; and

a pair of wings extending from opposite sides of the sleeve member, wherein the pair of wings are engaged by the bias member to urge the adapter sleeve toward the first end of the receptacle housing.

29. A fiber optic plug and receptacle assembly according to claim 22, wherein the fiber optic receptacle further comprises an adapter retainer connected to the receptacle housing proximate the first end thereof, the adapter retainer engaging the adapter sleeve so as to retain the adapter sleeve within the receptacle housing, the adapter retainer also engaging the plug body of the fiber optic plug.

30. A universal fiber optic receptacle comprising:

a receptacle housing extending lengthwise between opposed first end and second end;

an adapter retainer connected to the receptacle housing proximate the first end thereof, the adapter retainer and the receptacle housing cooperating to define an internal cavity sized to receive any one of an adapter sleeve selected from a group comprising an MTP adapter sleeve, an SC adapter sleeve, an MTRJ adapter sleeve, an LC adapter sleeve, a Unicam adapter sleeve, a DC adapter sleeve, and an SC-DC adapter sleeve; and

an adapter sleeve disposed within the internal cavity defined by the adapter retainer and the receptacle housing, the adapter sleeve selected from the group comprising an MTP adapter sleeve, an SC adapter sleeve, an MTRJ adapter sleeve, an LC adapter sleeve, a Unicam adapter sleeve, a DC adapter sleeve, and an SC-DC adapter sleeve, the adapter sleeve defining a lengthwise extending passage opening through opposed first and second ends for receiving and aligning a front face of a plug ferrule with a front face of a receptacle ferrule.

31. A universal fiber optic receptacle according to claim 30, wherein the adapter retainer is threadably connected to the receptacle housing such that the adapter retainer is capable of being disconnected from the receptacle housing in order to access the adapter sleeve.

32. An adapter sleeve comprising:

a sleeve member extending lengthwise between a first end and an second end, the sleeve member defining an internal passageway extending between the first and second ends and sized to permit the plug ferrule and the receptacle ferrule to be inserted into the sleeve member in an aligned relationship via the first end and second end, respectively; and

a latch mechanism proximate the second end of the sleeve member for mechanically engaging the receptacle ferrule,

wherein the first end of the sleeve member is free of any latch mechanism.

33. An adapter sleeve according to claim 32, wherein the latch mechanism comprises a pair of latches proximate the second end of the sleeve member for engaging the receptacle ferrule.