Connectorized optical component misalignment detection system

• US 20040222363A1
• Filed: 05/07/2003
• Published: 11/11/2004
• Est. Priority Date: 05/07/2003
• Status: Abandoned Application

• Current Assignee: II-VI Delaware, Inc. (Coherent Corp.)
• Original Assignee: Honeywell International Inc.
• Inventors: Williams, Rick S., Lalonde, Andre R.
• Application Number:
  US10/430,941
• Publication Number:
  US 20040222363A1
• Time in Patent Office: Days
• US Class Current: 250/227.14
• CPC Class Codes: G02B 6/3833 Details of mounting fibres in ferrules; Assembly methods; Manufacture
• CPC Class Codes: G02B 6/385 Accessories for testing or observation of connectors means for centering or aligning the light guide within the ferrule with auxiliary facilities for movably aligning or adjusting the fibre within its ferrule, measuring position, eccentricity G02B6/3843; mechanical features associated with the optical testing of optical fibres G01M11/088

Abstract

A misalignment detection system for checking the coupling of a component and a medium via a receptacle of a connectorized arrangement. Power coupling measurements between an optical component and a fiber are presented as illustrative examples of the invention. A ferrule of a fiber is inserted into a bore of a receptacle that has the component attached to the end of the receptacle opposite of the bore. The ferrule of the fiber is attached to a support structure having an absorber spring between the structure and ferrule. A first force is applied pressing the ferrule into the bore. Also, a rotating force orthogonal to the first force is applied to the structure causing the ferrule to wiggle in the bore. Power measurements are taken while the first force is applied and then also while the rotating force is applied.

Claims

1. A method for detecting misalignment of a component and a fiber, comprising:

activating a component within a receptacle at a first current and measuring a first power of a component'"'"'s output with a first detector;

positioning a structure holding a fiber in a bore of the receptacle wherein a first end of the fiber is positioned approximately perpendicular to and approximately at the center of an output surface of the component;

activating the component at the first current and measuring a second output power at a second end of the fiber with a second detector; and

calculating a ratio of the second power to the first power.

2. The method of claim 1, further comprising:

activating the component at the first current;

moving the structure holding the fiber having the first end in a circle; and

obtaining a plurality of measurements of a third output power from the second end of the fiber with the second detector as the structure is moved about in a circle.

3. The method of claim 2, further comprising:

selecting the highest and the lowest measurements of the third output power; and

calculating a ratio of the highest measurement to the lowest measurement.

4. The method of claim 3, further comprising calculating a coupling efficiency from the lowest measurement of the third output power and the measured first power.

5. A system for determining misalignment of a component and a fiber, comprising:

a component;

a receptacle attached to said component;

a ferrule holding a fiber, insertable in said receptacle;

a support structure attached to said ferrule;

a slide connected to said support structure;

a first light detector proximate to the fiber;

a second light detector proximate to said receptacle; and

a rotator structure attachable to said support structure.

6. The system of claim 5, wherein:

said first light detector may make a first measurement of a first output of light from said component;

said ferrule may be inserted in said receptacle;

said slide may apply a first force in a direction approximately parallel to an axis of the fiber to maintain an insertion of said ferrule in said receptacle; and

said second light detector may make a second measurement of a second output of light from the fiber.

7. The system of claim 6, wherein:

said rotator structure may apply a second force having a direction approximately orthogonal to the first force, to said support structure and ferrule; and

the direction of the second force may rotate in a circle in a plane approximately orthogonal to the first force.

8. The system of claim 7, wherein said second light detector may make a plurality of third measurements of the second output of light while said rotator structure applies the second force to said support structure and ferrule.

9. The system of claim 8, wherein a first ratio of the second measurement to the first measurement is calculated.

10. The system of claim 8, wherein:

the highest and lowest third measurements are selected; and

a second ratio of the lowest third measurement to the highest third measurement is calculated.

11. The system of claim 8, wherein a third ratio of the lowest third measurement to the first measurement is calculated.

12. A method for detecting misalignment of a component, comprising:

attaching a component to a receptacle having an output bore opening;

measuring a first output power of the component at the output bore opening;

inserting a ferrule having a first end of a fiber, attached to a support structure, into the output bore opening;

measuring a second output power from the first end of the fiber;

moving the support structure and ferrule in a circle, the circle in a plane that is approximately perpendicular to a longitudinal axis of the fiber in the ferrule and support structure; and

measuring instances of the second output power from a second end of the fiber at various positions of the support structure and ferrule while being moved in a circle.

13. The method of claim 12, further comprising calculating a first ratio of the first power to the second power.

14. The method of claim 12, further comprising:

selecting the lowest and highest instances of the second output power; and

calculating a second ratio of the lowest and highest instances of the second output power.

15. The method of claim 12, further comprising calculating a third ratio of the lowest instance of the second output power and the first output power.

16. The method of claim 12, further comprising calculating a fourth ratio of the highest instance of the second output power and the first output power.

17. A device for measuring alignment comprising:

a holder having a first place for a component and a second place for a first end of a medium;

a support structure having a place for the medium;

a rotator structure attached to said support structure; and

a power measuring mechanism proximate to said holder and to a second end of the medium.

18. The device of claim 17, wherein said power measuring mechanism may take a measurement of a first power at the second place of said holder, of a component situated in the first place of said holder.

19. The device of claim 18, wherein said power measuring mechanism may take a measurement of a second power at the second end of the medium having the first end at the second place of said holder.

20. The device of claim 19, wherein:

said rotator structure may apply a force against said support structure; and

the force has a direction that rotates about a longitudinal axis of the medium.

21. The device of claim 20, wherein said power measuring mechanism may take measurements of a third power at the second end of the medium at various directions of the force.

22. The device of claim 21, wherein:

the lowest and highest measurements of the third power are selected;

a first ratio may be calculated of the lowest measurement of the third power and the measurement of the first power.

23. The device of claim 21, wherein a second ratio may be calculated of the measurements of the first and second powers.

24. The device of clam 21, wherein a third ratio is calculated of the lowest and highest measurements of the third power.

25. A device for measuring alignment and/or coupling efficiency, comprising:

a coupling structure having a first place for a component and a second place for a first end of a medium;

a rotator structure attached to the medium; and

a power indicator.

26. The device of claim 25, wherein said power indicator may provide an indication of a first power at the second place of said coupling structure.

27. The device of claim 26, wherein said power indicator may provide an indication of a second power at a second end of the medium.

28. The device of claim 27, wherein:

said rotator structure may apply a force against the medium; and

the force has a direction that rotates about a longitudinal axis of the medium.

29. The device of claim 28, wherein said power indicator may provide indications of a third power at the second end of the medium at various directions of the force.

30. The device of claim 29, wherein:

the lowest and highest indications of the third power are selected; and

a first ratio may be determined of the lowest and highest indications of the third power.

31. The device of claim 29, wherein a second ratio may be determined from the lowest indication of the third power and the indication of the first power.

32. The device of claim 29, wherein a third ratio may be determined from the indication of the first and second powers.

33. A means for determining alignment comprising:

means for holding a component;

means for holding a medium, wherein said means for holding a medium has a first end coupled to said means for holding a component; and

means for measuring power proximate to said means for holding a component.

34. The means of claim 33, further comprising means for applying a force at a second end of said means for holding a medium.

35. The means of claim 34, wherein:

a component may be placed in said means for holding a component; and

a medium may be situated in said means for holding a medium.

36. The means of claim 35, wherein:

said means for measuring power may measure a first power from the component at the first end of said means for holding a medium; and

said means for measuring power may measure a second power from an end of the medium proximate to the second end of said means for holding a medium.

37. The means of claim 36, wherein a first ratio is the second power to the first power.

38. The means of claim 36, wherein said means for applying a force at the second end of said means for holding a medium may apply a force in a plurality of directions around in a circle that is in a plane approximately perpendicular to a longitudinal axis of said means for holding a medium.

39. The means of clam 38, wherein said means for measuring power may take a plurality of measurements of a third power from the end of the medium proximate to the second end of said means for holding a medium, corresponding to the force applied at the second end of said means for holding a medium in a plurality of directions, respectively.

40. The means of claim 39, wherein:

the lowest and highest measurements are selected from the plurality of measurements of the third power; and

a second ratio may be determined from the lowest and highest measurements of the third power.

41. The means of claim 39, wherein:

the lowest measurement is selected from the plurality of measurements of the third power; and

a third ratio may be determined from the lowest measurement of the third power and a measurement of the first power.

42. A system for determining misalignment of a component and a fiber, comprising:

a component having a first detector;

a receptacle attached to said component;

a ferrule holding a fiber, insertable in said receptacle;

a support structure attached to said ferrule;

a moveable structure connected to said support structure; and

a rotator structure attachable to said support structure.

43. The system of claim 42, wherein:

a second light detector may make a first measurement of a first output of light from the fiber of said ferrule;

said ferrule may be inserted in said receptacle;

said moveable structure may apply a first force in a direction approximately parallel to an axis of the fiber to maintain an insertion of said ferrule in said receptacle; and

the first light detector may make a second measurement of a second output of light from the fiber of said ferrule.

44. The system of claim 43, wherein:

said rotator structure may apply a second force having a direction approximately orthogonal to the first force, to said support structure and ferrule; and

the direction of the second force may rotate in a circle in a plane approximately orthogonal to the first force.

45. The system of claim 44, wherein the first light detector may make a plurality of third measurements of the second output of light while said rotator structure applies the second force to said support structure and ferrule.

46. The system of claim 45, wherein a first ratio of the second measurement to the first measurement is calculated.

47. The system of claim 45, wherein:

the highest and lowest third measurements are selected; and

a second ratio of the lowest third measurement to the highest third measurement is calculated.

48. The system of claim 45, wherein a third ratio of the lowest third measurement to the first measurement is calculated.

49. A method for detecting misalignment of a component and a fiber, comprising:

activating a component within a receptacle at a first current and measuring a first power of a component'"'"'s output with a detector;

positioning a structure holding a fiber in a bore of the receptacle wherein a first end of the fiber is positioned approximately perpendicular to and approximately at the center of an output surface of the component;

activating the component at the first current and measuring a second output power at a second end of the fiber with the detector; and

calculating a ratio of the second power to the first power.

50. The method of claim 49, further comprising:

activating the component at the first current;

moving the structure holding the fiber having the first end in a circle;

obtaining a plurality of measurements of a third output power from the second end of the fiber with the second detector as the structure is moved about in a circle;

selecting the highest and the lowest measurements of the third output power; and

calculating a ratio of the highest measurement to the lowest measurement.