Beam delivery system

Patent metadata

Field	Value
Publication number	US-11892744-B2
Application number	US-202117316354-A
Country	US
Kind code	B2
Filing date	May 10, 2021
Priority date	Jun 10, 2020
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

Provided is a novel beam delivery system for quantum computing applications that includes a beam delivery photonic integrated circuit on a chip and an optical relay assembly. The beam delivery photonic integrated circuit on a chip may contain one or more layers, and a layer may contain one or more inputs connecting one or more outputs. The optical relay assembly receives a beam or beams from one or more outputs from a layer of the beam delivery photonic integrated circuit. The optical relay assembly focuses each received beam on a corresponding position of an atomic object confinement apparatus.

First claim

That which is claimed:

1. A beam delivery system comprising:
a beam delivery photonic integrated circuit comprising:
one or more optical inputs;
a plurality of waveguide outputs, wherein each of the plurality of waveguide outputs are tapered;
a plurality of beam paths, each beam path connecting one of the plurality of waveguide outputs to at least one of the one or more optical inputs,
wherein at least one of the plurality of waveguide outputs that is connected to a first optical input of the one or more optical inputs is directed to a photodetector configured to measure an intensity of the waveguide output directed to the photodetector,
wherein each of the plurality of beam paths connected to the first optical input comprises a respective optical element configured to provide a respective beam having a respective power that is substantially constant by removing power fluctuations from the respective beam provided via a respective waveguide output of the plurality of waveguide outputs based on the intensity of the waveguide output measured by the photodetector, and
wherein the beam delivery photonic integrated circuit is on a chip;

a telecentric optical relay assembly, the telecentric optical relay assembly configured to receive beams provided by at least two of the plurality of waveguide outputs and focus each received beam on a corresponding one of a plurality of positions of an atomic object confinement apparatus in a telecentric manner.

2. The beam delivery system of claim 1 , wherein one or more beam paths of the plurality of beam paths comprises a respective optical element configured to tune a respective beam for at least one of frequency, phase, or intensity.

3. The beam delivery system of claim 1 , wherein the atomic object confinement apparatus is disposed within a vacuum chamber and the beam delivery system comprises one or more optical elements disposed within the vacuum chamber.

4. The beam delivery system of claim 1 , wherein the plurality of beam paths are defined lithographically.

5. The beam delivery system of claim 1 , wherein the plurality of waveguide outputs are located on a polished edge of the beam delivery photonic integrated circuit.

6. The beam delivery system of claim 1 , wherein each of the waveguide outputs are on one side of the beam delivery photonic integrated circuit and are parallel to each other.

7. The beam delivery system of claim 1 , wherein each of the plurality of waveguide outputs are at most 150 micrometers from the next closest of the plurality of waveguide outputs.

8. The beam delivery system of claim 1 , wherein the optical input is butt-coupled to an optical fiber providing an input beam.

9. The beam delivery system of claim 1 , wherein the atomic object confinement apparatus is disposed within a vacuum chamber and the beam delivery photonic integrated circuit is disposed within the vacuum chamber.

10. A beam delivery system comprising:
a beam delivery photonic integrated circuit comprising:
a first waveguide layer and a second waveguide layer;
the first waveguide layer comprising:
a first optical input;
a plurality of first waveguide outputs, wherein the plurality of first waveguide outputs are tapered;
a plurality of first beam paths, each first beam path connecting one of the plurality of first waveguide outputs to the first optical input,
wherein at least one of the plurality of waveguide outputs that is connected to a first optical input of the one or more optical inputs is directed to a photodetector configured to measure an intensity of the waveguide output directed to the photodetector, and
wherein each of the plurality of beam paths connected to the first optical input comprise a respective optical element configured to provide a respective beam having a respective power that is substantially constant by removing power fluctuations from the respective beam provided via a respective waveguide output of the plurality of waveguide outputs based on the intensity of the waveguide output directed to the photodetector,

the second waveguide layer comprising:
a second optical input;
a plurality of second waveguide outputs, wherein the plurality of second waveguide outputs are tapered;
a plurality of second beam paths, each second beam path connecting one of the plurality of second waveguide outputs to the second optical input;
wherein the beam delivery photonic integrated circuit is on a chip;

a telecentric optical relay assembly, the telecentric optical relay assembly configured to receive beams provided by at least one of the plurality of first waveguide outputs and at least one of the plurality of second waveguide outputs, and the telecentric optical relay assembly further configured to focus each received beam on a corresponding plurality of positions of an atomic object confinement apparatus in a telecentric manner.

11. The beam delivery system claim 10 , wherein the atomic object confinement apparatus is disposed within a vacuum chamber and the beam delivery system comprises one or more optical elements disposed within the vacuum chamber.

12. The beam delivery system claim 10 , wherein one or more of the plurality of first beam paths or the plurality of second beam paths comprises an optical element configured to tune a beam for at least one of frequency, phase, or intensity.

13. The beam delivery system claim 10 , wherein the plurality of first waveguide outputs and the plurality of second waveguide outputs are located on a polished edge of the beam delivery photonic integrated circuit.

14. The beam delivery system claim 10 , wherein each of the plurality of first waveguide outputs and the plurality of second waveguide outputs are on one side of the beam delivery photonic integrated circuit and are parallel to each other.

15. The beam delivery system claim 10 , wherein each of the plurality of first waveguide outputs are at most 150 micrometers from the next closest of the plurality of waveguide outputs.

16. The beam delivery system claim 10 , wherein at least one of the first waveguide layer or the second waveguide layer comprises a dielectric material.

17. A beam delivery system comprising:
a beam delivery photonic integrated circuit comprising:
a plurality of optical inputs;
a plurality of waveguide outputs, wherein each of the plurality of waveguide outputs is tapered,
a plurality of beam paths, each beam path connecting one of the plurality of waveguide outputs to one of the plurality of optical inputs,
wherein at least one of the plurality of waveguide outputs that is connected to a first optical input of the one or more optical inputs is directed to a photodetector configured to measure an intensity of the waveguide output directed to the photodetector,
wherein each of the plurality of beam paths connected to the first optical input comprises a respective optical element configured to provide a respective beam having a respective power that is substantially constant by removing power fluctuations from the respective beam provided via a respective waveguide output of the plurality of waveguide outputs based on the intensity of the waveguide output directed to the photodetector,
wherein the beam delivery photonic integrated circuit is on a chip;
wherein the respective beam is provided via the respective waveguide output to a respective position of an atomic object confinement apparatus, and
wherein the atomic object confinement apparatus and the beam delivery photonic integrated circuit are disposed within a vacuum chamber.

18. The beam delivery system of claim

Assignees

• Quantinuum Llc

Inventors

• Rowe Mary A
• Belt Michael
• Spann Bryan T
• Krogstad Molly R
• Horning Robert D
• Deen David A
• Young Michael D
• Worts Nathan

Classifications

• G06E3/005 Primary

  using electro-optical or opto-electronic means · CPC title

• G02F1/29 Primary

  for the control of the position or the direction of light beams, i.e. deflection · CPC title

• G02B6/125 Primary

  Bends, branchings or intersections · CPC title

• G02B6/1228

  Tapered waveguides, e.g. integrated spot-size transformers (for coupling with fibres G02B6/305) · CPC title

• G02F1/292

  by controlled diffraction or phased-array beam steering (controlled diffraction for optical switching G02F1/31) · CPC title