Free space optical communication-enabled textile assembly

• US 10,594,400 B2
• Filed: 06/12/2018
• Issued: 03/17/2020
• Est. Priority Date: 06/16/2017
• Status: Active Grant

• Current Assignee: Advanced Functional Fabrics of America
• Original Assignee: Advanced Functional Fabrics of America
• Inventors: Chung, Chia-Chun, Cox, Jason, Fink, Yoel, Ibanescu, Mihai, Chhav, Chhea
• Primary Examiner(s): Bedtelyon, John
• Application Number:
  US16/006,343
• Publication Number:
  US 20190007139A1
• Time in Patent Office: 644 Days
• CPC Class Codes: A61B 5/0017 transmitting optical signals transmission by light H04B10/00
• CPC Class Codes: A61B 5/6802 Sensor mounted on worn items
• CPC Class Codes: B29D 11/00721 involving preforms for the manufacture of light guides
• CPC Class Codes: D01D 5/00 Formation of filaments, threads, or the like
• CPC Class Codes: H04B 10/11 Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
• CPC Class Codes: H04B 10/112 Line-of-sight transmission over an extended range
• CPC Class Codes: H04B 10/2581 Multimode transmission
• CPC Class Codes: H04B 10/2587 using a single light source for multiple stations
• CPC Class Codes: H04B 10/803 Free space interconnects, e.g. between circuit boards or chips

Abstract

A textile capable of detecting electromagnetic radiation includes interlaced fibers; a photodetector embedded, as a result of a fiber draw process, within a particular one of the fibers; and a first electrical conductor extending within the particular fiber and along a longitudinal axis thereof. The first electrical conductor is in electrical contact with the photodetector, and the photodetector position in the particular fiber corresponds to a lowest energy configuration relative to a pattern of flow along the longitudinal axis of the particular fiber throughout the fiber draw process. A method of manufacturing the textile and a system including the textile are also disclosed.

Claims

1. A textile capable of detecting electromagnetic radiation, the textile comprising:

a plurality of interlaced fibers;

a photodetector embedded, as a result of a fiber draw process, within a particular one of the plurality of fibers; and

a first electrical conductor extending within the particular fiber and along a longitudinal axis thereof, the first electrical conductor in electrical contact with the photodetector,

wherein the photodetector position in the particular fiber comprises a lowest energy configuration relative to a pattern of flow along the longitudinal axis of the particular fiber throughout the fiber draw process.

2. The textile of claim 1, wherein the photodetector comprises a photodiode.

3. The textile of claim 1, wherein the photodetector is adapted to detect an optical communication signal having a wavelength between 360 nanometers and 2,000 nanometers.

4. The textile of claim 1, wherein the photodetector is diamond-shaped when viewed in a direction perpendicular to the longitudinal axis of the particular fiber.

5. The textile of claim 1, wherein the first electrical conductor comprises tungsten.

6. The textile of claim 1 further comprising shielding surrounding at least a portion of the particular fiber.

7. The textile of claim 1 further comprising second and third electrical conductors extending within the particular fiber and along the longitudinal axis thereof, the second electrical conductor in electrical contact with the photodetector and the third electrical conductor providing mechanical stability to the photodetector without being in electrical contact with the photodetector.

8. A system capable of detecting electromagnetic radiation, comprising:

the textile of claim 7; and

an interconnect for removably coupling the first and second electrical conductors to an amplifier circuit.

9. The system of claim 8 further comprising the amplifier circuit, wherein the amplifier circuit is adapted to amplify an optical communication signal detected by the photodetector and to reject common-mode signals representative of electromagnetic interference.

10. A method of manufacturing a textile capable of detecting electromagnetic radiation, the method comprising the steps of:

positioning a photodetector within a pocket of a preform material in a lowest energy configuration relative to a subsequent flow pattern of the preform material;

positioning a first electrical conductor within a slot of the preform material;

drawing a fiber by causing the preform material to flow, wherein the drawing step i) embeds the photodetector within the fiber while maintaining the photodetector in the lowest energy configuration relative to the flow pattern of the preform material, and ii) causes the first electrical conductor to extend within the fiber along a longitudinal axis thereof and to make electrical contact with the photodetector; and

interlacing the drawn fiber with at least one additional fiber to form the textile.

11. The method of claim 10, wherein the photodetector comprises a photodiode.

12. The method of claim 10, wherein the photodetector is adapted to detect an optical communication signal having a wavelength between 360 nanometers and 2,000 nanometers.

13. The method of claim 10, wherein the photodetector is diamond-shaped when viewed in a direction perpendicular to the longitudinal axis of the drawn fiber.

14. The method of claim 10, wherein the preform material comprises a thermoplastic material.

15. The method of claim 10, wherein the first electrical conductor comprises tungsten.

16. The method of claim 10 further comprising forming the pocket and the slot within the preform material prior to positioning the photodetector and the first electrical conductor within the preform material.

17. The method of claim 10 further comprising the step of shielding at least a portion of the fiber.

18. The method of claim 10 further comprising positioning second and third electrical conductors within slots of the preform material.

19. The method of claim 18, wherein the drawing step further causes a) the second electrical conductor to extend within the fiber along the longitudinal axis thereof and to make electrical contact with the photodetector, and b) the third electrical conductor to extend within the fiber along the longitudinal axis thereof and to provide mechanical stability to the photodetector without making electrical contact with the photodetector.

20. The method of claim 19 further comprising providing an interconnect for removably coupling the first and second electrical conductors to an amplifier circuit.

21. The method of claim 20, further comprising providing the amplifier circuit, wherein the amplifier circuit is adapted to amplify an optical communication signal detected by the photodetector and to reject common-mode signals representative of electromagnetic interference.