Photonic guiding device
View Patent ↗A photonic guiding device and methods of making and using are disclosed. The photonic guiding device comprises a large core hollow waveguide configured to interconnect electronic circuitry on a circuit board. A reflective coating covers an interior of the hollow waveguide to provide a high reflectivity to enable light to be reflected from a surface of the reflective coating. A collimator is configured to collimate multi-mode coherent light directed into the hollow waveguide.
1. A photonic guiding system, comprising:
a large core hollow waveguide coupled to a circuit board located in a plane;
a reflective coating covering an interior of the hollow waveguide, wherein the reflective coating provides a high reflectivity to enable light to be reflected from a surface of the reflective coating;
a protective layer applied over the reflective coating to substantially reduce oxidation of the reflective coating, wherein the protective layer is substantially transparent at a wavelength of the coherent light; and
a collimator configured to collimate a multi-mode coherent light beam directed into the hollow waveguide to enable the multi-mode coherent light beam to be guided through the hollow waveguide with a reduced number of reflections of the multi-mode coherent light inside the hollow waveguide to decrease loss of the multi-mode coherent light beam through the waveguide.
2. A photonic guiding system as in claim 1 , further comprising a coupling device configured to direct at least a portion of the guided multi-mode coherent light beam to an optically coupled large core hollow waveguide that is outside the plane of the circuit board.
3. A photonic guiding system as in claim 2 , wherein the coupling device is selected from a group consisting of an optical beam splitter, an aperture, a semi transparent mirror, a diffractive grating, or a scatterer.
4. A photonic guiding system as in claim 1 , wherein the coherent light has a wavelength of less than 900 nanometers.
5. A photonic guiding system as in claim 1 , further comprising a multi-mode laser configured to provide multi-mode coherent light to be directed into the hollow waveguide.
6. A photonic guiding system as in claim 1 , wherein the large core hollow waveguide has a cross-sectional shape selected from the group consisting of square, rectangular, circular, and elliptical.
7. A photonic guiding system as in claim 1 , wherein the reflective coating is comprised of one or more metal layers.
8. A photonic guiding system as in claim 1 , wherein the reflective coating is a dielectric stack comprised of one or more dielectric layers.
9. A photonic guiding system as in claim 1 , wherein the large core hollow waveguide is configured to interconnect electronic circuitry located on at least two separate circuit boards.
10. A photonic guiding system as in claim 1 , wherein the large core hollow waveguide is configured to interconnect electronic circuitry located on a single circuit board.
11. A photonic guiding system as in claim 1 , further comprising an array of large core hollow waveguides configured to direct multi-mode coherent light.
12. A photonic guiding system as in claim 1 , wherein the photonic guiding device creates a loss of less than 0.1 dB/cm as the coherent light passes through the large core waveguide.