Optical alignment using reflective dove prisms

Patent metadata

Field	Value
Publication number	US-11322343-B2
Application number	US-202016903174-A
Country	US
Kind code	B2
Filing date	Jun 16, 2020
Priority date	Jul 9, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

Aspects of the present disclosure describe techniques for optical alignment using a reflective dove prism. For example, a system for optical alignment is described that includes an assembly having a housing with three separate, reflecting structures positioned to produce three reflections of one or more laser beams or one or more images, and a controller configured to control a rotation of the assembly about a pivot point to produce a tilt in orientation of the one or more lasers beams or the one or more images that is twice an angle of rotation of the assembly. Another system and a method for aligning laser beams using a housing with three separate, reflecting structures in a trapped ion quantum information processing (QIP) system are also described.

First claim

What is claimed is:

1. A system for optical alignment, comprising:
an assembly having a housing with three separate, reflecting structures positioned to produce three reflections of one or more laser beams or one or more images; and
a controller configured to control a rotation of the assembly about a pivot point to produce a tilt of the one or more lasers beams or the one or more images that is twice an angle of rotation of the assembly.

2. The system of claim 1 , wherein the reflecting structures are separate mirrors positioned at different locations of the housing.

3. The system of claim 1 , wherein:
the one or more laser beams include at least one ultraviolet (UV) laser beam, and
each of the three reflecting structures is configured to reflect the at least one UV laser beam without absorption of the at least one UV laser beam.

4. The system of claim 1 , wherein the reflecting structures are positioned along a direction of propagation of the one or more laser beams.

5. The system of claim 1 , wherein a first reflecting structure and a third reflecting structure of the reflecting structures are angled with respect to a propagation axis of the one or more laser beams.

6. The system of claim 5 , wherein the first reflecting structure and the third reflecting structure are angled with same but opposite tilts with respect to the propagation axis.

7. The system of claim 5 , wherein a second reflecting structure of the reflecting structures is offset from the propagation axis.

8. The system of claim 1 , wherein the reflecting structures include:
a first mirror configured to receive the one or more laser beams and angled with respect to a propagation axis of the one or more laser beams;
a second mirror configured to receive a first reflection of the one or more laser beams from the first mirror, the second mirror being offset from the propagation axis; and
a third mirror configured to receive a second reflection of the one or more laser beams from the second mirror, the third mirror being angled with respect to the propagation axis, the first mirror and the third mirror being angled with same but opposite tilts.

9. The system of claim 1 , wherein the housing is made of one material and the reflecting structures are made of a different material.

10. The system of claim 1 , wherein the controller is configured to rotate the assembly about the pivot point by up to 90 degrees in at least one direction.

11. A system for aligning laser beams in a trapped ion quantum information processing system, comprising:
optical sources configured to generate a linear array of laser beams;
an assembly having a housing with three separate, reflecting structures positioned to produce three reflections of the linear array of laser beams;
a controller configured to control a rotation of the assembly about a pivot point to produce a tilt of the linear array of laser beams that is twice an angle of rotation of the assembly; and
a trap having a linear array of ions, wherein the tilted linear array of laser beams is such that the linear array of laser beams align to the linear array of ions.

12. The system of claim 11 , wherein the reflecting structures are separate mirrors positioned at different locations of the housing.

13. The system of claim 11 , wherein:
the linear array of laser beams include at least one ultraviolet (UV) laser beam, and
each of the three reflecting structures is configured to reflect the at least one UV laser beam without absorption of the at least one UV laser beam.

14. The system of claim 11 , wherein the reflecting structures are positioned along a direction of propagation of the linear array of laser beams.

15. The system of claim 11 , wherein a first reflecting structure and a third reflecting structure of the reflecting structures are angled with respect to a propagation axis of the linear array of laser beams.

16. The system of claim 15 , wherein the first reflecting structure and the third reflecting structure are angled with same but opposite tilts with respect to the propagation axis.

17. The system of claim 15 , wherein a second reflecting structure of the reflecting structures is offset from the propagation axis.

18. The system of claim 11 , wherein the reflecting structures include:
a first mirror configured to receive the linear array of laser beams and angled with respect to a propagation axis of the linear array of laser beams;
a second mirror configured to receive a first reflection of the linear array of laser beams from the first mirror, the second mirror being offset from the propagation axis; and
a third mirror configured to receive a second reflection of the linear array of laser beams from the second mirror, the third mirror being angled with respect to the propagation axis, the first mirror and the third mirror being angled with same but opposite tilts.

19. The system of claim 11 , wherein the housing is made of one material and the reflecting structures are made of a different material.

20. The system of claim 11 , wherein the controller is configured to control the rotation of the assembly about the pivot point by up to 90 degrees in at least one direction.

21. A method for aligning laser beams in a trapped ion quantum information processing system, comprising:
receiving a linear array of laser beams at an assembly, the assembly having a housing with three separate, reflecting structures positioned to produce three reflections of the linear array of laser beams; and
adjusting a rotation of the assembly about a pivot point to produce a tilt of the linear array of laser beams that is twice an angle of rotation of the assembly, wherein the tilted linear array of laser beams is such that the linear array of laser beams align to a linear array of ions in a trap in the quantum information processing system.

Assignees

• Ionq Inc

Inventors

• Wong-Campos Jaime David
• Hudek Kai
• Debnath Shantanu

Classifications

• B82Y10/00

  Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic · CPC title

• H01S3/0071

  Beam steering, e.g. whereby a mirror outside the cavity is present to change the beam direction · CPC title

• H01J49/422 Primary

  Two-dimensional RF ion traps (ion guides without mass selection H01J49/062) · CPC title

• G02B26/0816

  by means of one or more reflecting elements · CPC title

• G02B5/0891 Primary

  Ultraviolet [UV] mirrors (apparatus for microlithography exposure G03F7/70; X-ray multilayer structures G21K1/06) · CPC title