Small form factor multi-fiber optical connectors and methods for making same

• US 6,259,856 B1
• Filed: 03/25/1999
• Issued: 07/10/2001
• Est. Priority Date: 03/04/1999
• Status: Expired due to Fees

• Current Assignee: Fitel USA Corporation
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Shahid, Muhammed A.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): STAFIRA, MICHAEL PATRICK
• Application Number:
  US09/276,285
• Time in Patent Office: 838 Days
• Field of Search: 385/76, 385/78, 385/83, 385/86, 385/147
• US Class Current: 385/147
• CPC Class Codes: G02B 6/3861 Adhesive bonding adhesives in general C09J
• 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 6/3885 Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type optical ribbon cable G02B6/4403, G02B6/448

Abstract

A small form factor, multi-fiber connector having the footprint of a LC connector for high density applications is disclosed. A multi-fiber ferrule, which may or may not be stacked, is received in the front end of the housing. A spring member is disposed within the housing for axially urging the multi-fiber ferrule outwardly to maintain the end face of the ferrule flush with the device to which it is coupled. The housing includes an end cap which snaps into the housing body and holds the spring member. Thus, a multi-fiber stackable connector in accordance with the present invention is relatively simple in construction and assembly, inexpensive, and user friendly.

Claims

1. A multi-fiber optical connector, comprising:

a stackable multi-fiber ferrule that terminates a plurality of optical fibers;

a single-ferrule housing having a first end, a second end, and an axial passageway extending from the first end to the second end, wherein the housing receives the multi-fiber ferrule in the first end thereof; and

a spring member disposed in the passageway and interacting with the multi-fiber ferrule to axially urge the multi-fiber ferrule outwardly.

2. The connector of claim 1, wherein said housing includes an end cap coupled to the second end thereof, and interacting with the spring member opposite the multi-fiber ferrule.

3. The connector of claim 2, wherein the multi-fiber ferrule terminates a single linear array of optical fibers.

4. The connector of claim 2, wherein the multi-fiber ferrule terminates stacked arrays of optical fibers.

5. The connector of claim 4, wherein the stacked arrays of optical fibers are configured so that the lateral spacing between adjacent optical fibers is an integer multiple of the vertical spacing between corresponding optical fibers.

6. The connector of claim 2, wherein the multi-fiber ferrule includes optical fibers spacing of approximately 250 microns.

7. The connector of claim 2, wherein the housing defines opposing slots, and wherein the multi-fiber ferrule at least partially extends through the slots.

8. The connector of claim 1, further comprising a spring latch extending from the housing.

9. The connector of claim 1, further comprising an adapter having a front end that receives the housing and a rear end that includes an aperture through which an end face of the multi-fiber ferrule protrudes.

10. The method for fabricating a multi-fiber optical connector, comprising:

providing an elongated single-ferrule housing having a first end, a second end, and an axial passageway extending from the first end to the second end;

placing a spring member in the axial passageway adjacent to the second end; and

placing a stackable multi-fiber ferrule in the first end of the plug housing so that the spring member axially urges the multi-fiber ferrule outwardly from the housing.

11. The method of claim 10, wherein the step of providing the elongated housing includes the step of providing an elongated housing with a spring latch extending therefrom.

12. The method of claim 10, wherein the step of providing the elongated housing includes the step of coupling an end cap to the second end of the elongated housing.

13. The method of claim 10, further comprising the step of providing an adapter having a first end that receives the elongated housing and a second end that includes an aperture through which an end face of the multi-fiber ferrule protrudes.

14. The method of claim 10, wherein the step of providing the elongated housing includes the step of providing an elongated housing that defines opposing lateral slots, and wherein the step of placing the multi-fiber ferrule includes the step of placing the multi-fiber ferrule in the first end of the elongated housing so that the multi-fiber ferrule at least partially extends through the slots.

15. A small form factor multi-fiber optical connector for high density applications, comprising

an elongated single-ferrule housing having a first end, a second end, and axial passageway there through;

a stackable multi-fiber ferrule received in the first end of the elongated single-ferrule housing;

an end cap coupled to the second end of the elongated single-ferrule housing; and

a loading mechanism disposed within the passageway between the multi-fiber ferrule and the end cap for axially urging the multi-fiber ferrule outwardly; and

a latch mechanism coupled to the elongated single-ferrule housing.

16. The connector of claim 15, wherein the elongated housing defines slots in opposing sides thereof, wherein the multi-fiber ferrule extends at least partially through the slots.

17. The connector of claim 15, wherein the multi-fiber ferrule terminates stacked arrays of optical fibers.

18. The connector of claim 17, wherein the stacked arrays of optical fibers are configured so that the lateral spacing between adjacent optical fibers is an integer multiple of the vertical spacing between corresponding optical fibers.

19. The connector of claim 15, wherein the multi-fiber ferrule includes optical fibers spacing of approximately 250 microns.

20. The connector of claim 15, further comprising an adapter having a first end that receives the elongated housing and a second end that includes an aperture through which an end face of the multi-fiber ferrule protrudes.

21. A multi-fiber optical connector, comprising:

a housing having a first end, a second end, and an axial passageway extending from the first end to the second end;

a stackable multi-fiber ferrule received in the first end of the housing;

an end cap received in the second end of the housing, the end cap having a cylindrical passageway for receiving at least a portion of the spring member disposed in the axial passageway of the housing; and

a spring member interacting with the multi-fiber ferrule to axially urge the multi-fiber ferrule outward.

22. A multi-fiber optical connector, comprising:

a housing having a first end, a second end, a top side, a bottom side, an axial passageway extending from the first end to the second end and at least one ridge on an inside surface of the housing defining the axial passageway;

a stackable multi-fiber ferrule having a front end, a rear end and a lip disposed adjacent the front end, wherein the ferrule is received in the first end of the housing and the lip is engaged by the ridge; and

a spring member disposed in the passageway and interacting with the multi-fiber ferrule to axially urge the lip against the ridge.