Fiber optic connector assembly

• US 4,944,568 A
• Filed: 09/05/1989
• Issued: 07/31/1990
• Est. Priority Date: 09/05/1989
• Status: Expired due to Term

• Current Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Original Assignee: Molex Incorporated (KOCH Industries Incorporated)
• Inventors: Danbach, Philip J., Sampson, Stephen
• Primary Examiner(s): Healy, Brain
• Application Number:
  US07/384,203
• Time in Patent Office: 329 Days
• Field of Search: 350/96.20, 350/96.15, 350/96.21, 350/96.17, 350/96.22, 250/227, 439/246, 439/247, 439/248, 439/577
• 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 6/3849 using mechanical protective elements, e.g. caps, hoods, sealing membranes G02B6/3816 takes precedence; provisionally see H01R13/44
• CPC Class Codes: G02B 6/3857 Crimping, i.e. involving plastic deformation
• CPC Class Codes: G02B 6/387 Connector plugs comprising two complementary members, e.g. shells, caps, covers, locked together
• 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 6/3888 Protection from over-extension or over-compression
• CPC Class Codes: G02B 6/3897 Connectors fixed to housings, casing, frames or circuit boards G02B6/44528 takes precedence
• CPC Class Codes: G02B 6/4249 comprising arrays of active devices and fibres
• CPC Class Codes: G02B 6/4292 the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Abstract

A connector assembly for blind mated back plane interface connections of optic fibers with active optical devices includes a shroud mounted in a back plane panel within which are received a receptacle assembly mated to connector modules. The modules, each associated with a cable of a plurality of optical fibers, subdivide the mated fibers into separately connected groups to avoid expensive tolerance requirements. The receptacle includes a housing and shims for precisely locating the active optical devices relative to the ends of the optic fibers. The interface connections are shielded from interference by conduction between the receptacle housing, a fiber termination ferrule and a rear housing and strain relief portion of each connector module.

Claims

1. A fiber optic connector assembly for interconnecting a plurality of active optical devices to a plurality of optical fibers each terminated in a ferrule having a nose portion, said assembly comprising:

a receptacle including a body member for supporting the plurality of active optical devices, said body member having a flat, planar mating face and a plurality of recesses each extending between said mating face and one of the active optical devices;

connector means including housing means with a plurality of ferrule receiving cavities and including a mating end;

means for supporting one of the ferrules in each of said cavities with the nose portion projecting from said mating end;

said housing means being supported adjacent said receptacle body with each of said nose portions received in one of said recesses;

the assebmly being characterized by;

said connector means including at least two similar separately mateable connector modules, said housing means including a corresponding number of at least two module housings each including a plurality of said ferrule receiving cavities;

a shroud interposed between said receptacle and said connector modules, said shroud including a peripheral wall extending between an open receptacle end and an open connector module end, said receptacle end being configured to receive said mating face within said peripheral wall; and

said connector modules being receivable in said connector module end of said shroud for independent compliance of each connector module with a different portion of said receptacle.

2. A fiber optic connector assembly as set forth in claim 1, further comprising spring means resiliently positioning said connector modules within within said shroud.

3. A fiber optic connector assembly as set forth in claim 2, said spring means comprising spring members supported on said module housings.

4. A fiber optic connector assembly as set forth in claim 1, further comprising latch means on said shroud and said connector modules for releasably holding said connector modules in said shroud.

5. A fiber optic connector assembly as set forth in claim 1, further comprising first internal wall means extending from said peripheral wall and engageable by said connector modules and by said receptacle housing to limit insertion of said connector modules and of said receptacle housing into said shroud.

6. A fiber optic connector assembly as set forth in claim 1, further comprising second internal wall means extending from said peripheral wall and defining separate subcompartments within said shroud for receipt of said connector modules.

7. A fiber optic connector assembly as set forth in claim 1, said receptacle housing including a number evenly divisible by four of said recesses arranged in a straight line, and each said module housing having four said ferrule receiving cavities arranged in a straight line.

8. A fiber optic connector assembly for coupling the end of an optic fiber to an active optical device comprising:

a ferrule capturing the end of the optic fiber, said ferrule having a body with a flange and a nose portion terminating substantially at the end of the optic fiber;

a connector housing having a cavity receiving said ferrule;

spring means engageable with said flange for resiliently urging said nose portion to project from said housing;

a receptacle having a body including a mating face, a recess for supporting the active optical device and an opening extending from said mating face to said recess; and

means for holding said connector housing adjacent to said receptable with said projecting nose portion received in said opening;

said fiber optic connector assembly being characterized by;

a radial step on said nose portion urged by said spring into contact with said mating face of said receptacle housing;

said nose portion having a reduced diameter end segment extending from said radial step and received in said opening; and

shim means in said receptacle housing recess for positioning the active optical device a predetermined distance from said mating face.

9. The fiber optic connector assembly of claim 8, said mating face and said radial step comprising flat planes perpendicular to the axis of said opening.

10. The fiber optic connector assembly of claim 9, said reduced diameter end segment and said opening comprising cylindrical surfaces parallel to the axis of said opening, and said shim means comprising alignment means for positioning the active optical device both axially and radially with respect to said opening.

11. The fiber optic connector assembly of claim 10, said shim means including an alignment sleeve in said receptacle housing recess engaging one end and a sidewall of the active optical device and a discrete shim element engaging the other end of the active optical device.

12. In a fiber optic connector assembly for use with an optic fiber and an active optical device, the combination comprising:

a conductive metal receptacle body supporting the active optical device;

a connector housing movable to a mated position with a forward end adjacent said receptacle body and including wall means defining a l cavity;

a conductive metal spring retention clip engageable with said wall means adjacent a rear end of said cavity;

a conductive metal ferrule surrounding the end of the optic fiber, said ferrule being received in said cavity and including a nose portion projecting from said forward end of said connector housing; and

a conductive metal spring in said cavity in contact with and in compression between said ferrule and said spring retention clip, said spring urging said ferrule nose portion into contact with said receptacle body and completing a continuous electrical circuit between said receptacle body and said spring retention clip.

13. The combination defined in claim 12, further comprising a step on said ferrule nose portion engageable with said receptacle body for pressing said ferrule into said cavity and further compressing said spring in said mated position.

14. The combination defined in claim 13, further comprising conductive metal rear shielding means engageable with the rear end of said connector housing and including a contact portion in electrical contact with said spring retention clip.

15. The combination defined in claim 14, further comprising mounting means defined on said rear shielding means and on said connector housing for holding said rear shielding means on said connector housing with said contact portion pressing said spring retention clip into said cavity and further compressing said spring.

16. The combination defined in claim 15 wherein said rear shielding means comprises a strain relief housing surrounding the rear end of said connector housing and having means for supporting the optic fiber at a region spaced from the rear end of the connector housing.