Modularized interposer

1. An interposer for optically coupling an optical device (OD) to a fiber, said OD mounted on a substrate, said interposer comprising:

a lens component comprising at least one lens for optically coupling with said OD mounted to said substrate, said lens having a first optical axis, said lens component also comprising a planar first surface for mating with said substrate such that at least a portion of said first surface contacts said substrate on which said OD is mounted, and a planar second surface for mating with a planar third surface of a fiber component, said first and second surfaces being parallel, said first optical axis passing through said first and second surfaces;

said fiber component comprising said third surface and a cavity for receiving at least one fiber and holding said fiber along a second optical axis, said third surface being parallel with said first and second surfaces, said first and second optical axes being perpendicular, said fiber component also comprising a reflective surface for reflecting light between said lens and a point, which is along said second optical axis and adjacent said cavity, wherein said fiber component is stacked on said lens component, and wherein no portion of said fiber component contacts said substrate.

2. The interposer of claim 1 , wherein said lens is defined by a lens cavity in said lens component.

3. The interposer of claim 2 , wherein said lens cavity is on the bottom of said lens component.

4. The interposer of claim 2 , wherein said lens cavity is on the top of said lens component.

5. The interposer of claim 1 , wherein said lens component is greater than 0.5 mm thick.

6. The interposer of claim 1 , wherein the distance between said lens and said second surface is less than the distance between said reflective surface and said point.

7. The interposer of claim 1 , further comprising a second lens at said point.

8. The interposer of claim 1 , wherein said lens component comprises at least one alignment feature for positioning said lens component on said substrate, said alignment feature being observable when viewing said lens component parallel to said first optical axis.

9. The interposer of claim 8 , wherein said alignment feature comprises two features, one on each side of said at least one lens.

10. The interposer of claim 1 , wherein said fiber component comprises at least one alignment feature for aligning said fiber component on said lens component.

11. The interposer of claim 10 , wherein said at least one alignment feature comprise two alignment holes, said alignment holes being adapted to receive alignment pins disposed in said lens component.

12. The interposer of claim 1 , wherein said cavity is a V-groove.

13. The interposer of claim 1 , wherein said cavity is configured to receive a ferrule containing said fiber.

14. The interposer of claim 1 , wherein said cavity is configured to receive a bare fiber.

15. The interposer of claim 1 , wherein said first, second and third surfaces are parallel to said substrate.

16. The interposer of claim 1 , wherein said fiber component has a top planar surface parallel to said third surface.

17. The interposer of claim 1 , wherein said OD comprises an opto-electric device.

18. AnT 4 e interposer for optically coupling an optical device (OD) to a fiber, said OD mounted on a substrate, said interposer comprising:

a lens component comprising at least one lens for optically coupling with said OD mounted to said substrate, said lens having a first optical axis, said lens component also comprising a planar first surface for mating with said substrate such that at least a portion of said first surface contacts said substrate on which said OD is mounted, and a planar second surface for mating with a planar third surface of a fiber component, said first and second surfaces being parallel, said first optical axis passing through said first and second surfaces;

said fiber component comprising said third surface and a cavity for receiving at least one fiber and holding said fiber along a second optical axis, said third surface being parallel with said first and second surfaces, said first and second optical axes being perpendicular, said fiber component also comprising a reflective surface for reflecting light between said lens and a point, which is along said second optical axis and adjacent said cavity, wherein said fiber component comprises at least one alignment feature for aligning said fiber component on said lens component, wherein said at least one alignment feature comprise two alignment holes, said alignment holes being adapted to receive alignment pins disposed in said lens component, and wherein said lens component comprises second alignment features which cooperate with said alignment holes of said fiber component to align said lens component with said fiber component.

19. The interposer of claim 18 , wherein said second alignment features comprise alignment holes.

20. The interposer of claim 18 , wherein said fiber component is stacked on said lens component.

21. The interposer of claim 15 , wherein no portion of said fiber component contacts said substrate.

22. An interposer for optically coupling an optical device (OD) to a fiber, said OD mounted on a substrate, said interposer comprising:

a lens component comprising at least one lens for optically coupling with said OD mounted to said substrate, said lens having a first optical axis, said lens component also comprising a planar first surface, at least a portion of which contacts said substrate, and a planar second surface for mating with a planar third surface of a fiber component, said first and second surfaces being parallel, said first optical axis passing through said first and second surfaces;

said fiber component comprising said third surface and a cavity for receiving at least one fiber and holding said fiber along a second optical axis, said third surface being parallel with said first and second surfaces, said first and second optical axes being perpendicular, said fiber component also comprising a reflective surface for reflecting light between said lens and a point, which is along said second optical axis and adjacent said cavity, wherein said fiber component is stacked on said lens component, and wherein no portion of said fiber component contacts said substrate.

23. The interposer of claim 22 , wherein said OD comprises an opto-electric device.