DIAMOND NITROGEN VACANCY SENSOR WITH DUAL RF SOURCES

• US 20170212180A1
• Filed: 01/21/2016
• Published: 07/27/2017
• Est. Priority Date: 01/21/2016
• Status: Active Grant

• Current Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Original Assignee: Lockheed Martin Corporation (Martin Marietta Corporation)
• Inventors: Hahn, Joseph W., Lew, Wilbur, Huynh, Duc
• Granted Patent: US 10,520,558 B2
• Time in Patent Office: Days
• CPC Class Codes: G01R 33/032 using magneto-optic devices, e.g. Faraday or Cotton-Mouton effect

Abstract

Systems and apparatuses are disclosed for providing a uniform RF field to a nitrogen vacancy center diamond.

Claims

1. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

an RF feed cable operably connected to first RF element and the second RF element that provides an RF signal to the first RF element and the second RF element; and

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond.

2. The magnetic field sensor assembly of claim 1, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

3. The magnetic field sensor assembly of claim 1, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

4. The magnetic field sensor assembly of claim 3, further comprising a photo sensor that receives the light that egresses from the light egress portion.

5. The magnetic field sensor assembly of claim 2, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

6. The magnetic field sensor assembly of claim 5, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

7. The magnetic field sensor assembly of claim 6, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

8. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

a first RF feed cable operably connected to first RF element that provides a first RF signal to the first RF element;

a second RF feed cable operably connected to the second RF element that provides a second RF signal to the second RF element; and

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond.

9. The magnetic field sensor assembly of claim 8, wherein the first RF signal is the same as the second RF signal.

10. The magnetic field sensor assembly of claim 8, wherein the first RF signal is different from the second RF signal.

11. The magnetic field sensor assembly of claim 8, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

12. The magnetic field sensor assembly of claim 8, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

13. The magnetic field sensor assembly of claim 12, further comprising a photo sensor that receives the light that egresses from the light egress portion.

14. The magnetic field sensor assembly of claim 11, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

15. The magnetic field sensor assembly of claim 14, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

16. The magnetic field sensor assembly of claim 15, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

17. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

an RF feed cable operably connected to first RF element and the second RF element that provides an RF signal to the first RF element and the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element; and

a housing position adjustment that adjusts a position of the NV center diamond relative to a light source.

18. The magnetic field sensor assembly of claim 17, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

19. The magnetic field sensor assembly of claim 17, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

20. The magnetic field sensor assembly of claim 19, further comprising a photo sensor that receives the light that egresses from the light egress portion.

21. The magnetic field sensor assembly of claim 18, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

22. The magnetic field sensor assembly of claim 21, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

23. The magnetic field sensor assembly of claim 22, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

24. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

an RF feed cable operably connected to first RF element and the second RF element that provides an RF signal to the first RF element and the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element; and

a housing rotational adjustment that adjusts a rotation of the NV center diamond relative to a light source.

25. The magnetic field sensor assembly of claim 24, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

26. The magnetic field sensor assembly of claim 24, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

27. The magnetic field sensor assembly of claim 26, further comprising a photo sensor that receives the light that egresses from the light egress portion.

28. The magnetic field sensor assembly of claim 25, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

29. The magnetic field sensor assembly of claim 28, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

30. The magnetic field sensor assembly of claim 29, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

50. The magnetic field sensor assembly of claim 24, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

31. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

a first RF feed cable operably connected to first RF element that provides a first RF signal to the first RF element;

a second RF feed cable operably connected to the second RF element that provides a second RF signal to the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element; and

a housing position adjustment that adjusts a position of the NV center diamond relative to a light source.

32. The magnetic field sensor assembly of claim 31, wherein the first RF signal is the same as the second RF signal.

33. The magnetic field sensor assembly of claim 31, wherein the first RF signal is different from the second RF signal.

34. The magnetic field sensor assembly of claim 31, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

35. The magnetic field sensor assembly of claim 31, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

36. The magnetic field sensor assembly of claim 35, further comprising a photo sensor that receives the light that egresses from the light egress portion.

37. The magnetic field sensor assembly of claim 34, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

38. The magnetic field sensor assembly of claim 37, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

39. The magnetic field sensor assembly of claim 38, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

40. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

a first RF feed cable operably connected to first RF element that provides a first RF signal to the first RF element;

a second RF feed cable operably connected to the second RF element that provides a second RF signal to the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element; and

a housing rotational adjustment that adjusts a rotation of the NV center diamond relative to a light source.

41. The magnetic field sensor assembly of claim 40, wherein the first RF signal is the same as the second RF signal.

42. The magnetic field sensor assembly of claim 40, wherein the first RF signal is different from the second RF signal.

43. The magnetic field sensor assembly of claim 40, further comprising a spacer between the first RF element and the second RF element that separates the first RF element and the second RF element.

44. The magnetic field sensor assembly of claim 40, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a light ingress portion that allows light to travel through the first circuit board including the first RF element via the light ingress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a light egress portion that allows light to travel through the second circuit board including the second RF element via the light egress portion.

45. The magnetic field sensor assembly of claim 44, further comprising a photo sensor that receives the light that egresses from the light egress portion.

46. The magnetic field sensor assembly of claim 43, further comprising a light ingress portion within the spacer that allows light to travel through the spacer to the NV diamond.

47. The magnetic field sensor assembly of claim 46, further comprising:

a first circuit board that includes the first RF element, wherein the first circuit board comprises a first light egress portion that allows light to travel through the first circuit board including the first RF element via the first light egress portion; and

a second circuit board that includes the second RF element, wherein the second circuit board comprises a second light egress portion that allows light to travel through the second circuit board including the second RF element via the second light egress portion.

48. The magnetic field sensor assembly of claim 47, further comprising:

a first photo sensing assembly that receives light from the NV diamond via the first light egress portion; and

a second photo sensing assembly that receives light from the NV diamond via the second light egress portion.

49. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

an RF feed cable operably connected to first RF element and the second RF element that provides an RF signal to the first RF element and the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element;

a housing position adjustment that adjusts a position of the NV center diamond relative to a light source; and

a housing rotational adjustment that adjusts a rotation of the NV center diamond relative to the light source.

51. A magnetic field sensor assembly comprising:

a first radio frequency (RF) element;

a second RF element;

a first RF feed cable operably connected to first RF element that provides a first RF signal to the first RF element;

a second RF feed cable operably connected to the second RF element that provides a second RF signal to the second RF element;

a nitrogen-vacancy (NV) center diamond located between the first RF element and the second RF element, wherein the first RF element and the second RF element generate a microwave signal that is uniform over the NV center diamond;

a housing that houses the NV diamond, the first RF element, and the second RF element;

a housing position adjustment that adjusts a position of the NV center diamond relative to a light source; and

a housing rotational adjustment that adjusts a rotation of the NV center diamond relative to the light source.

52. The magnetic field sensor assembly of claim 51, wherein the first RF signal is the same as the second RF signal.

53. The magnetic field sensor assembly of claim 51, wherein the first RF signal is different from the second RF signal.