Alignment pin and optical communication system

1. An alignment pin for an optical communication system, comprising:

a body extending between a first end and a second end, said body including, from the first end to the second end;

a first portion adapted to extend along a direction in a receiving hole of a printed circuit board;

a second portion adapted to extend along said direction in a receiving through hole of an optical coupling device adapted to optically couple the printed circuit board to an external optical component;

a third portion adapted to extend along said direction in a receiving hole of an external optical component; and

an abutting surface disposed intermediate between the second and third portions, the abutting surface extending normal to said direction, and adapted to be placed in contact with a parallel complementary surface of the optical coupling device.

2. The alignment pin according to claim 1 , further comprising at the first portion, a second abutting surface extending normal to said direction, and adapted to be placed in contact with a parallel complementary surface of the printed circuit board.

3. The alignment pin according to claim 1 , comprising at least one extension protruding from said body, wherein the extension bears a respective abutting surface.

4. The alignment pin according to claim 3 , wherein one extension is integral with the body.

5. The alignment pin according to claim 3 , wherein at least one extension is a separate part fixed to the body.

6. The alignment pin according to claim 5 , wherein a position of the extension along the direction with respect to the second end is adjustable.

7. The alignment pin according to claim 1 , further comprising at the first portion, a fixation portion adapted to contribute to a fixation of the alignment pin to the printed circuit board.

8. An alignment pin for an optical communication system, comprising:

a body extending between a first end and a second end, said body including, from the first end to the second end:

a first portion adapted to extend along a direction in a receiving hole of a printed circuit board;

a second portion adapted to extend along said direction in a receiving through hole of an optical coupling device adapted to optically couple the printed circuit board to an external optical component; and

a third portion adapted to extend along said direction in a receiving hole of an external optical component;

an abutting surface disposed intermediate between the second and third portions, the abutting surface extending normal to said direction, and adapted to be placed in contact with a parallel complementary surface of the optical coupling device; and

a fixation portion disposed at the first portion, the fixation portion adapted to contribute to a fixation of the alignment pin to the printed circuit board.

9. The alignment pin according to claim 8 , wherein the fixation portion is a thread.

10. The alignment pin according to claim 9 , further comprising a sleeve adapted to be screwed on the thread from the first end.

11. The alignment pin according to claim 8 , wherein said body is elongated from said first end to said second end along said direction.

12. The alignment pin according to claim 8 , wherein at least two of said first, second and third portions are offset with respect to one another along a transverse direction transverse to said direction.

13. The alignment pin according to claim 12 , wherein said second and third portions are offset with respect to one another along said transverse direction, and a linking part extends between said second and third portions are bears said abutting surface.

14. The alignment system comprising two alignment pins according to claim 8 , offset with respect to one another along a transverse direction, and a linking part extending between said two alignment pins, wherein said linking part has a second abutting surface extending normal to said direction, and adapted to be placed in contact with a parallel complementary surface of the printed circuit board.

15. An optical communication system comprising:

a printed circuit board having a hole;

an optical coupling device adapted to optically couple the printed circuit board to an external optical component, said optical coupling device having a through hole and a surface; and

an alignment pin according to claim 1 , wherein the first portion extends in said receiving hole of the printed circuit board, the second portion extends in said through hole of the optical coupling device, the abutting surface is placed in contact with said surface of the optical coupling device.

16. An optical communication system comprising:

a printed circuit board having a hole;

an optical coupling device adapted to optically couple the printed circuit board to an external optical component, said optical coupling device having a through hole and a surface; and

an alignment pin including:

a body extending between a first end and a second end, said body including, from the first end to the second end:

a first portion extending along a direction in said receiving hole of the printed circuit board;

a second portion extending along said direction in said receiving through hole of the optical coupling device;

a third portion adapted to extend along said direction in a receiving hole of said external optical component;

an abutting surface intermediate between the second and third portions, the abutting surface extending normal to said direction, and placed in contact with said surface of the optical coupling device; and

a fixation portion disposed at the first portion, the fixation portion adapted to fix the pin to the printed circuit board.

17. The optical communication system according to claim 15 , wherein the hole in the printed circuit board is threaded.

18. The optical communication system according to claim 16 , wherein the hole in the printed circuit board is threaded.

19. The alignment pin according to claim 1 , wherein said body is elongated from said first end to said second end along said direction.

20. The alignment pin according to claim 1 , wherein at least two of said first, second and third portions are offset with respect to one another along a transverse direction transverse to said direction.

21. The alignment pin according to claim 20 , wherein said second and third portions are offset with respect to one another along said transverse direction, and a linking part extends between said second and third portions are bears said abutting surface.

22. The alignment system comprising two alignment pins according to claim 1 , offset with respect to one another along a transverse direction, and a linking part extending between said two alignment pins, wherein said linking part has a second abutting surface extending normal to said direction, and adapted to be placed in contact with a parallel complementary surface of the printed circuit board.

23. The alignment pin according to claim 7 , wherein the fixation portion is a thread.

24. The alignment pin according to claim 23 , further comprising a sleeve adapted to be screwed on the thread from the first end.

25. The optical communication system of claim 15 , wherein the alignment pin further comprises at the first portion, a second abutting surface extending normal to said direction, and the second abutting surface is placed in contact with a parallel complementary surface of the printed circuit board.

26. The optical communication system of claim 15 , wherein the alignment pin comprises at least one extension protruding from said body, wherein the extension bears a respective abutting surface.

27. The optical communication system of claim 26 , wherein the at least one extension is integral with the body.