Apparatus and method for controlling propagation and/or transmission of electromagnetic radiation in flexible waveguide(s)

• US 10,228,556 B2
• Filed: 04/03/2015
• Issued: 03/12/2019
• Est. Priority Date: 04/04/2014
• Status: Active Grant

• Current Assignee: The General Hospital Corporation (Mass General Brigham, Inc.)
• Original Assignee: The General Hospital Corporation (Mass General Brigham, Inc.)
• Inventors: Reddy, Rohith K., Tearney, Guillermo J.
• Primary Examiner(s): Akanbi, Isiaka
• Application Number:
  US15/301,647
• Publication Number:
  US 20170017075A1
• Time in Patent Office: 1,439 Days
• Field of Search: 356601-614
• CPC Class Codes: G01B 11/18 using photoelastic elements
• CPC Class Codes: G01B 11/2513 with several lines being projected in more than one direction, e.g. grids, patterns
• CPC Class Codes: G01D 5/268 using optical fibres G01D5/28 - G01D5/38 take precedence
• CPC Class Codes: G01J 3/30 Measuring the intensity of spectral lines directly on the spectrum itself G01J3/42, G01J3/44 take precedence
• CPC Class Codes: G01M 11/025 by determining the shape of the object to be tested measuring contours or curvatures by optical means G01B11/24
• CPC Class Codes: G02B 2006/0098 for scanning
• CPC Class Codes: G02B 21/0028 specially adapted for specific applications, e.g. for endoscopes, ophthalmoscopes, attachments to conventional microscopes
• CPC Class Codes: G02B 21/0076 arrangements using fluorescence or luminescence
• CPC Class Codes: G02B 26/02 for controlling the intensity of light G02B26/004 takes precedence
• CPC Class Codes: G02B 26/10 Scanning systems
• CPC Class Codes: G02B 6/0008 the light being emitted at the end of the fibre
• CPC Class Codes: G02B 6/02076 Refractive index modulation gratings, e.g. Bragg gratings
• CPC Class Codes: G02B 6/0288 Multimode fibre, e.g. graded index core for compensating modal dispersion
• CPC Class Codes: G02B 6/3624 Fibre head, e.g. fibre probe termination optical details of light guide terminations G02B6/241; reshaping of light guides G02B6/2552; optical details of coupling light into or out of fibre end G02B6/262

Abstract

According to an exemplary embodiment of the present disclosure, apparatus and process for providing at least one radiation can be provided. For example, with at least one multi-mode waveguide, it is possible to transmit the radiation(s). In addition, with a shape sensing arrangement, it is possible To dynamically measure a shape of the multi-mode waveguide(s). Further, with a specifically programmed computer arrangement, it is possible to control a light modulator arrangement based on the dynamically-measured shape to cause the radiation(s) transmitted through the multi-mode waveguide(s) to have at least one pattern.

Claims

1. An apparatus for providing at least one radiation, comprising:

at least one multi-mode waveguide configured to transmit the at least one radiation;

a light modulator arrangement;

a shape sensing arrangement which is configured to dynamically measure a shape of the at least one multi-mode waveguide; and

a processor to;

calculate a change in an electromagnetic field associated with the dynamically-measured shape,

compute a transfer function of the at least one multi-mode waveguide based on calculating the change in the electromagnetic field, and

control the light modulator arrangement based on the transfer function to cause the at least one radiation transmitted through the at least one multi-mode waveguide to have at least one pattern.

2. The apparatus according to claim 1, wherein the at least one radiation is an electromagnetic radiation.

3. The apparatus according to claim 1, wherein the at least one multi-mode waveguide is a multimode fiber.

4. The apparatus according to claim 1, wherein the light modulator arrangement includes a spatial light modulator.

5. The apparatus according to claim 4, wherein the spatial light modulator is at least one of (i) a digital light processor, (ii) a digital micro mirror device, (iii) an electrically addressed spatial light modulator, or (iv) an optically-addressed spatial light modulator.

6. The apparatus according to claim 1, wherein the shape sensing arrangement is a further waveguide which is physically coupled to the at least one multi-mode waveguide.

7. The apparatus according to claim 6, wherein the further waveguide contains characteristics to facilitate a determination of the dynamically-measured shape.

8. The apparatus according to claim 1, wherein the shape sensing arrangement includes a plurality of further waveguides which are physically coupled to the at least one multi-mode waveguide.

9. The apparatus according to claim 8, wherein the further waveguides contain characteristics or structural configurations to facilitate a determination of the dynamically-measured shape.

10. The apparatus according to claim 9, wherein the further waveguides contain at least one of (i) fiber Bragg gratings, (ii) discrete distributed reflectors, (iii) Rayleigh scattering arrangements, or (iv) Raman scattering arrangements.

11. The apparatus according to claim 1, wherein the at least one pattern includes at least one of (i) a focused spot, (ii) a plurality of spots, (iii) a random pattern, or (iv) an image.

12. The apparatus according to claim 1, wherein the computer arrangement is configured to control the light modulator arrangement to scan at least one sample with the at least one pattern of the at least one radiation.

13. The apparatus according to claim 12, wherein the computer arrangement is further configured to generate at least one of at least one optical coherence tomography image, a confocal image, a multi-photon image, a multi-harmonic image, or a spectroscopic images based on a further radiation detected from the at least one sample, in response to the scan of the at least one sample with the at least one pattern that is predetermined.

14. The apparatus according to claim 1, further comprising a detector arrangement, wherein the at least one pattern includes a plurality of predetermined patterns to impact at least one sample, wherein a return radiation that is based on the predetermined patterns are detected by the detector arrangement, and wherein the computer arrangement is further configured to reconstruct an image of the at least one sample based on the detected return radiation.

15. The apparatus according to claim 14, further comprising an aperture that is provided between the light modulator arrangement and the detector arrangement.

16. The apparatus according to claim 1, further comprising a flexible probe housing which at least partially encloses the at least one multi-mode waveguide and the shape sensing arrangement.

17. The apparatus according to claim 16, further comprising a conical mirror provided in the flexible probe housing, and position and structured to reflect the at least one radiation received from the at least one multi-mode waveguide.

18. The apparatus according to claim 1, wherein the at least one pattern is at least one predetermined pattern.

19. The apparatus according to claim 18, wherein the at least one predetermined pattern is determined iteratively based on prior measurements.

20. The apparatus according to claim 1, wherein the at least one pattern is determined by providing the at least one radiation through a scattering medium.

21. The apparatus of claim 1, wherein the pattern comprises a focused spot, and wherein the focused spot is scanned across at least one sample by using the light modulator to dynamically change an amplitude and a phase of the at least one radiation based on the dynamically-measured shape of the at least one multi-mode waveguide.

22. A process for providing at least one radiation, comprising:

with at least one multi-mode waveguide, transmitting the at least one radiation;

dynamically measuring a shape of the at least one multi-mode waveguide;

calculating, using a processor, a change in an electromagnetic field associated with the dynamically-measured shape of the at least one multi-mode waveguide, computing, using the processor, a transfer function of the at least one multi-mode waveguide based on calculating the change in the electromagnetic field; and

controlling, using the processor, a light modulator arrangement based on the transfer function to cause the at least one radiation transmitted through the at least one multi-mode waveguide to have at least one pattern.