Apparatus for optical coherence tomography within integrated optoelectronic circuit

1. An apparatus comprising:

at least one layer of silicon dioxide; and

an integrated optoelectronic circuit comprising at least an interferometer configured for optical coherence tomography wherein the integrated optoelectronic circuit is formed within defining surfaces of the at least one layer of silicon dioxide such that at least a portion of the integrated optoelectronic circuit is formed from the at least one layer of silicon dioxide.

2. An apparatus as claimed in claim 1 wherein the interferometer comprises an input light guide, a beam splitter, a sample line light guide, a delay line light guide and an output light guide.

3. An apparatus as claimed in claim 2 wherein the interferometer comprises at least one mirror configured to reflect light back into the delay line.

4. An apparatus as claimed in claim 1 wherein the integrated optoelectronic circuit comprises at least one optical circulator.

5. An apparatus as claimed in claim 1 wherein the integrated optoelectronic circuit comprises a detector configured to detect light from the interferometer.

6. An apparatus as claimed in claim 5 wherein the detector comprises at least one diode.

7. An apparatus as claimed in claim 5 wherein the detector comprises a balanced diode pair.

8. An apparatus as claimed in claim 1 wherein the at least one layer of silicon dioxide is provided on a substrate.

9. An apparatus as claimed in claim 1 wherein the integrated optoelectronic circuit has a largest dimension of less than 10 mm.

10. An apparatus as claimed in claim 1 , wherein the integrated optoelectronic circuit comprises a detector configured to detect light from the interferometer; the at least one layer of silicon dioxide is provided on a substrate; and the apparatus comprises a light source located on the substrate.

11. An apparatus as claimed in claim 1 wherein the apparatus further comprises a coherent light source.

12. An apparatus as claimed in claim 11 wherein the light source comprises a laser.

13. A method comprising:

providing at least one layer of silicon dioxide; and

forming an integrated optoelectronic circuit comprising at least an interferometer configured for optical coherence tomography within defining surfaces of the at least one layer of silicon dioxide such that at least a portion of the integrated optoelectronic circuit is formed from the at least one layer of silicon dioxide.

14. A wearable electronic device comprising:

optical coherence tomography device comprising a light source; at least one layer of silicon dioxide; and an integrated optoelectronic circuit comprising at least an interferometer configured for optical coherence tomography wherein the integrated optoelectronic circuit is formed within defining surfaces of the at least one layer of silicon dioxide such that at least a portion of the integrated optoelectronic circuit is formed from the at least one layer of silicon dioxide; and

attachment configured to attach the optical coherence tomography device to a subject.

15. A wearable electronic device as claimed in claim 14 wherein the attachment configured to attach the optical coherence tomography device to a subject comprises a strap.

16. A wearable electronic device as claimed in claim 4 wherein the interferometer comprises an input light guide, a beam splitter, a sample line light guide, a delay line light guide and an output light guide.

17. A wearable electronic device as claimed in claim 16 wherein the interferometer comprises at least one mirror configured to reflect light back into the delay line.

18. A wearable electronic device as claimed in claim 14 wherein the integrated optoelectronic circuit comprises at least one optical circulator.

19. A wearable electronic device as claimed in claim 14 wherein the integrated optoelectronic circuit comprises a detector configured to detect light from the interferometer.

20. A wearable electronic device as claimed in claim 19 wherein the detector comprises at least one diode.