Single fiber connector for pluggable card or module optical interconnections

• US 4,406,514 A
• Filed: 03/26/1980
• Issued: 09/27/1983
• Est. Priority Date: 03/26/1980
• Status: Expired due to Term

• Current Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Harris Corporation (L3Harris Technologies, Inc.)
• Inventors: Hillegonds, Clarence G., Mills, Luther P., Stankos, William C., File, Peter G.
• Primary Examiner(s): Lee, John D.
• Application Number:
  US06/134,225
• Time in Patent Office: 1,280 Days
• Field of Search: 350/96.20, 350/96.21, 350/96.22
• US Class Current: 385/88
• CPC Class Codes: G02B 6/3847 with means preventing fibre end damage, e.g. recessed fibre surfaces
• CPC Class Codes: G02B 6/3861 Adhesive bonding adhesives in general C09J
• 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 6/3889 using encapsulation for protection, e.g. adhesive, molding or casting resin
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence

Abstract

A single fiber connector for a pluggable card or module optical interconnection is formed of a connector socket that may be mounted to a printed circuit card or optical module and a connector pin that is attached to a housing or a suitable bulkhead by which the printed circuit card or optical module is to be supported. Each of the connector socket and the connector pin has an internally threaded axial bore for receiving and retaining a single optical fiber cable coupler from the end of which an optical fiber strand extends. Each pin and socket includes a further precision bore through which the fibers pass to abut end-to-end in the precision bore of the socket. The socket further has a tapered end male section that is inserted into a corresponding tapered end female section of the pin, with the fiber held by the pin being automatically guided into the precision bore of the male section of the socket as the printed circuit card or module is inserted into the connector on the bulkhead. To effect this automatic guidance of the fibers together, a bracket is mounted on the printed circuit card for holding the connector socket. The bracket is dimensionally positioned relative to the end of the card so that when the card is mounted on the bulkhead through associated hardware, such as electrical pin connector support units, the optical fiber connector and socket will be properly dimensionally located for alignment and fiber coupling.

Claims

1. An optical fiber connector assembly, adapted for use with an optical module unit that is retained by a connector arrangement mounted on a module unit support structure, for joining a first optical fiber associated with said optical module unit in abutting end-to-end relationship with a second optical fiber associated with said module unit support structure comprising:

a first optical fiber connector subassembly adapted to be mounted on one of said optical module unit and said module unit support structure so as to possess an amount of play relative to said one of said optical module unit and said module unit support structure and thereby to an axis along which said first and second optical fibers are to be joined together, said first subassembly retaining therein said first optical fiber; and

a second optical fiber connector subassembly adapted to be mounted on the other of said optical module unit and said module unit support structure, said second subassembly retaining therein said second optical fiber; and

wherein

said first and second optical fiber connector subassemblies are positioned on said one and said other of said unit and structure so that as said optical module unit is joined to said module unit support structure, said first subassembly is permitted to undergo displacement relative to its mounting on said one of said optical module unit and said module unit support structure and thereby to said axis, whereby said first and second subassemblies are caused to be connected together and urge said first and second optical fibers into abutting end-to-end relationship.

2. An optical fiber connector assembly according to claim 1, wherein said one of said optical module unit and said module unit support structure includes means for supporting said first subassembly for connection with said second subassembly while permitting said first subassembly to be displaced in a direction away from said second subassembly mounted on said other of said optical module unit and said module unit support structure.

3. An optical fiber connector assembly according to claim 2, further including a spring seated against one end of said supporting means and mechanically coupled with said first subassembly for urging said first subassembly toward said second subassembly and thereby urging said first optical fiber retained therein into abutting end-to-end engagement with said second optical fiber retained by said second subassembly.

4. An optical fiber connector assembly according to claim 2, wherein said optical module unit comprises an electronic/optic circuit-containing board having mounted thereon a bracket by way of which said first optical fiber connector subassembly is supported, said bracket having an aperture through which said first subassembly is permitted to undergo said displacement.

5. An optical fiber connector assembly according to claim 4, further including a spring seated against one face of said bracket and mechanically coupled with said first subassembly for urging said first subassembly toward said second subassembly and thereby urging said first optical fiber retained therein into abutting end-to-end engagement with said second optical fiber retained by said second subassembly.

6. An optical fiber connector assembly according to claim 5, wherein said first subassembly includes a ring mounted thereon, said spring being retained around said first subassembly between said ring and said one face of said bracket.

7. An optical fiber connector assembly according to claim 6, wherein said one face of said bracket includes a recessed portion against the bottom of which one end of said spring is seated.

8. An optical fiber connector assembly according to claim 7, wherein the diameter of said first subassembly on the side of said bracket opposite that upon which said ring is mounted is larger than the diameter of said aperture in said bracket.

9. An optical fiber connector assembly according to claim 4, wherein the diameter of the aperture in said bracket is larger than the outer diameter of said first subassembly passing therethrough so as to permit said amount of play between said bracket and said first subassembly relative to the axis of said first and second optical fibers.

10. An optical fiber connector assembly according to claim 9, further including a spring seated against one face of said bracket and mechanically coupled with said first subassembly for urging said first subassembly toward said second subassembly and thereby urging said first optical fiber retained therein into abutting end-to-end engagement with said second optical fiber retained by said second subassembly.

11. An optical fiber connector assembly according to claim 1, wherein each of said first and second subassemblies includes an interior bore through which a respective one of said optical fibers and a surrounding protection fiber pin snugly extend, with said optical fibers and said pins abutting end-to-end in the interior bore of said first subassembly upon the joining of said first and second subassemblies together.

12. An optical fiber connector assembly according to claim 11, wherein said first subassembly includes a first end section having a tapered outer surface portion extending from an end face thereof, and said second subassembly includes a second end section having a tapered inner surface portion extending from an end face thereof into a hollow bore portion, into which said second optical fiber and surrounding protective pin extend, for receiving the first end section of said first subassembly.

13. An optical fiber connector assembly according to claim 12, wherein said first subassembly further includes a tapered inner surface portion leading from said end face of said first end section to its interior bore, so that upon the joining of said first end section of said first subassembly into the hollow bore portion of the second end section of said second subassembly, said second optical fiber and surrounding protective pin may be guided into the interior bore of said first subassembly so as to abut end-to-end with said first optical fiber therein.

14. An optical fiber connector assembly according to claim 11, wherein said first subassembly includes a socket into which an optical fiber terminal connector for said first optical fiber may be inserted and retained thereby, with said first optical fiber extending from the optical fiber terminal connector into the interior bore of said socket.

15. An optical fiber connector assembly according to claim 14, wherein said second subassembly includes a connector pin into which an optical fiber terminal connector for said second optical fiber may be inserted and retained thereby, with said second optical fiber extending from the optical fiber terminal connector into the interior bore of said connector pin.

16. For use in an optical fiber connector assembly, adapted for use with an optical module unit that is retained by a connector arrangement mounted to a module unit support structure, for joining a first optical fiber associated with said optical module unit in abutting end-to-end relationship with a second optical fiber associated with said module unit support structure, an optical fiber connector subassembly comprising:

first means for retaining therein one of said first and second optical fibers,

second means, adapted to be coupled to one of said optical module unit and said module unit support structure, for supporting said first means while providing an amount of play therebetween so that said first means is displaceable relative to said second means and thereby to an axis along which said first and second optical fibers are to be joined together,

whereby, during the joining of said optical module unit to said module unit support structure, said first means is permitted to undergo a displacement relative to said second means and thereby to said axis, thereby causing the optical fiber retained thereby to be urged into abutting end-to-end relationship with the other of said first and second optical fibers retained by the other of said optical module unit and said module unit support structure.

17. An optical fiber connector subassembly according to claim 16, wherein said second means includes means for supporting said first means while permitting said first means to be displaced in a direction away from the other of said optical module unit and said mobile unit support structure.

18. An optical fiber connector subassembly according to claim 16, wherein said first means comprises a socket into which an optical fiber terminal connector for said one of said optical fibers may be inserted and retained thereby, with said one optical fiber extending from the optical fiber terminal connector into an interior bore provided in said socket.

19. An optical fiber connector subassembly according to claim 18, wherein said second means comprises a bracket coupled with said module unit for receiving said socket therein, said bracket having an aperture through which said socket extends, with the displacement of said socket being capable of occurring at the portion of said bracket in which said aperture is provided.

20. An optical fiber connector subassembly according to claim 19, wherein said second means further comprises a spring seated against an interior face of said bracket and being mechanically coupled with said socket for urging said socket toward said support structure.

21. An optical fiber connector subassembly according to claim 20, wherein said socket includes a flange, of a diameter wider than said aperture, which is urged toward an exterior face of said bracket in which said aperture is provided by the action of said spring.