IP Library › Granted Patent US 9,946,033
Granted Patent B2
US 9,946,033 · App. 15/014,125 · Granted Apr 17, 2018

Fiber optic connector with adhesive management

Inventor: Kevin Eugene Elliott (Horseheads, NY)
Assignee: Corning Optical Communications LLC
G02B6/3833G02B6/325G02B6/3839G02B6/3853G02B6/3861G02B6/3652G02B6/3885
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Quick Facts
Patent No.
US 9,946,033
App. No.
15/014,125
Granted
Apr 17, 2018
Kind
B2
Abstract

A fiber optic connector includes a ferrule configured to receive and support one or more optical fibers and at least one component coupled to a surface of the ferrule by an adhesive. The at least one component overlays a footprint area defined on the surface to which the adhesive is applied, and the surface has a plurality of recessed formations within the footprint area to accommodate the adhesive.

Claims (40)

1. A fiber optic connector for a cable having a plurality of optical fibers, the fiber optic connector comprising:

a ferrule comprising a plurality of u-shaped or v-shaped grooves configured to receive and support an exposed core of the plurality of optical fibers, and a first plurality of recessed formations formed within at least a portion of the plurality of u-shaped or v-shaped fiber support features, wherein the plurality of optical fibers are secured within the plurality of u-shaped or v-shaped grooves by an adhesive such that the adhesive within an individual u-shaped or v-shaped groove does not migrate into a neighboring u-shaped or v-shaped groove;

at least one lens element positioned on the ferrule;

and at least one component coupled to a surface of the ferrule by an adhesive, the at least one component being a window coupled to a forward-facing surface of the ferrule by the adhesive;

wherein the at least one component overlays a footprint area defined on the surface to which the adhesive is applied, the surface having a second plurality of recessed formations within the footprint area, and the at least one lens element of the ferrule being recessed from the forward-facing surface so that an air gap is provided between the at least one lens element and the window.

2. The fiber optic connector of claim 1 , wherein the second plurality of recessed formations are distributed on substantially the entire footprint area.

3. The fiber optic connector of claim 1 , wherein:

the forward-facing surface of the ferrule extends in a transverse plane relative to a longitudinal axis along which the ferrule extends;

a gap thickness is defined between the window and the transverse plane; and

the volume of adhesive coupling the window to the forward-facing surface is greater than a volume defined by the product of the gap thickness and the footprint area.

4. The fiber optic connector of claim 1 , wherein the window is prismatic with opposed front and rear surfaces extending between a plurality of side surfaces, and further wherein at least one of the side surfaces of the window is substantially co-planar with a side surface of the ferrule.

5. The fiber optic connector of claim 4 , wherein the second plurality of recessed formations on the forward-facing surface of the ferrule are formed in a region of the footprint area proximate the side surface of the ferrule that is substantially co-planar with at least one side surface of the window.

6. The fiber optic connector of claim 1 , wherein the adhesive forms a continuous bead on the forward-facing surface around an opening to the air gap.

7. The fiber optic connector of claim 1 , wherein the at least one component comprises one or more gradient refractive index (GRIN) lenses.

8. The fiber optic connector of claim 1 , wherein the second plurality of recessed formations comprises a plurality of pyramid or cone-shaped wells formed in the footprint area.

9. An optical cable assembly, comprising:

a cable having one or more optical fibers carried within a jacket; and

a fiber optic connector according to claim 1 coupled to an end of the cable.

10. A method of assembling a fiber optic assembly including a fiber optic connector according to claim 1 , the method comprising:

providing the ferrule of the fiber optic connector;

applying the adhesive to the surface of the ferrule; and

coupling the at least one component to the at least one surface with the adhesive.

11. The method of claim 10 , wherein applying the adhesive comprises dispensing droplets of the adhesive having a volume of approximately 2 nanoliters or larger.

12. A fiber optic connector for a cable having a plurality of optical fibers, the fiber optic connector comprising:

a ferrule comprising:

a first plurality of u-shaped or v-shaped fiber support features configured to receive and support an exposed core of the plurality of optical fibers, and a first plurality of recessed formations formed within at least a portion of the plurality of u-shaped or v-shaped fiber support features, wherein the plurality of optical fibers are secured within the plurality of u-shaped or v-shaped grooves by an adhesive such that the adhesive within an individual u-shaped or v-shaped groove does not migrate into a neighboring u-shaped or v-shaped groove;

a fiber tray recess;

a second plurality of recessed formations within at least a portion of the fiber tray recess;

a front surface;

a recess within the front surface extending in a transverse plane relative to a longitudinal axis along which the ferrule extend, the recess defining a forward-facing surface that is recessed relative to the front surface; and

a third plurality of recessed formations within at least a portion of the forward-facing surface;

a fiber tray coupled to the ferrule by an adhesive disposed between the fiber tray and the fiber tray recess; and

a window coupled to the forward-facing surface of the ferrule by an adhesive.

13. The fiber optic connector of claim 12 , wherein

a gap thickness is defined between the window and the transverse plane; and

the volume of adhesive coupling the window to the forward-facing surface is greater than a volume defined by the product of the gap thickness and the footprint area.

14. The fiber optic connector of claim 12 , wherein the ferrule comprises at least one lens element, the at least one lens element being recessed from the forward-facing surface so that an air gap is provided between the at least one lens element and the window.

15. The fiber optic connector of claim 12 , wherein the fiber tray further comprises:

a second plurality of fiber support features; and

a fourth plurality of recessed formations disposed on at least a portion of the second plurality of fiber support features.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 23, 2016
From: ELLIOTT, KEVIN EUGENE
To: CORNING OPTICAL COMMUNICATIONS LLC
Reel/Frame 037794/0102 →
Priority Claims (1)
EP 13179601 · Aug 7, 2013 · regional
Continuity (2)
Continuation PCTUS2014049089 · Jul 31, 2014
Related Publication 20160154189A1 · Jun 2, 2016