Solid-state tip-tilt-phased array

Patent metadata

Field	Value
Publication number	US-11953801-B2
Application number	US-202117206756-A
Country	US
Kind code	B2
Filing date	Mar 19, 2021
Priority date	May 20, 2020
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A solid state optical beam steering device including a body of electro-optical material wherein the body of electro-optical material comprises any material of a class of hydrogen-doped phase-change metal oxide and wherein the body has a first face and a second face opposite the first face, a first transparent resistive sheet on the first face of the body of electro optic material, wherein the first transparent resistive sheet has a first side and a second side, and a transparent conductor on the second face of the body of electro optic material, wherein the transparent conductor is coupled to the second side of the first transparent resistive sheet.

First claim

What is claimed is:

1. A solid state optical beam steering device comprising:
a solid state body of electro-optical material wherein the solid state body of electro-optical material comprises a material of a class of hydrogen-doped phase-change metal oxide and wherein the solid state body has a first face and a second face opposite the first face;
a conductor on the first face of the solid state body of the electro optic material;
a first resistive sheet on the second face of the solid state body of the electro optic material, wherein the first resistive sheet has a first side and a second side; and
wherein the conductor is electrically connected to the second side of the first resistive sheet; and
wherein the electro-optical material comprises NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , or GdNiO 3 or any combination of NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , GdNiO 3 , wherein a refractive index of the electro-optical material is configured to be controlled by a hydrogen doping density.

2. The solid state optical beam steering device of claim 1 further comprising:
a first voltage source applied between the first side of the first resistive sheet and the conductor to apply a voltage bias across the first resistive sheet;
wherein the first voltage source is variable to select a beam steering angle.

3. The solid state optical beam steering device of claim 1 :
wherein when a voltage gradient is applied along the second face of the electro optic material, a gradient in the index of refraction steers light entering the first face at a first angle to exit from the second face at a second angle, the solid state optical beam steering device operating in a transmission mode; or
wherein the solid state optical beam steering device further comprises a mirror on the first face of the solid state body of electro optic material;
wherein when a voltage gradient is applied along the second face of the electro optic material, a gradient in the index of refraction steers light entering the second face at a first angle to be reflected by the mirror and to exit from the second face at second angle, the solid state optical beam steering device operating in a reflection mode.

4. The solid state optical beam steering device of claim 1 where the first resistive sheet and the conductor are each transparent.

5. The solid state optical beam steering device of claim 4 further comprising:
a second transparent resistive sheet on the second face of the electro optic material adjacent to and either above or below the first transparent resistive sheet, the second transparent resistive sheet having a third and a fourth side, wherein the fourth side is electrically connected to the transparent conductor.

6. The solid state optical beam steering device of claim 5 further comprising:
a second voltage source applied between the third side of the second transparent resistive sheet and the transparent conductor to apply a voltage bias across the second transparent resistive sheet.

7. The solid state optical beam steering device of claim 6 :
wherein the first voltage source biases the first transparent resistive sheet in a first direction;
wherein the second voltage source biases the second transparent resistive sheet in a second direction; and
wherein the second direction is orthogonal to the first direction.

8. The solid state optical beam steering device of claim 7 further comprising:
a second variable voltage applied between the first transparent resistive sheet and the transparent conductor;
wherein the second variable voltage is variable to apply a variable phase-delay.

9. A solid state optical beam steering device comprising:
a solid state body of electro-optical material wherein the solid state body of electro-optical material comprises any material of a class of hydrogen-doped phase-change metal oxide and wherein the solid state body has a first face and a second face opposite the first face;
a first resistive sheet on a first face of the solid state body of electro-optical material, wherein the first-resistive sheet extends adjacent the first face; and
a second sheet on a second face of the solid state body of electro-optical material, wherein the second sheet extends along the second face;
wherein an end of the first resistive sheet and an end of the second sheet are electrically connected to one another; and
wherein the electro-optical material comprises NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , or GdNiO 3 or any combination of NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , GdNiO 3 , wherein a refractive index of the electro-optical material is configured to be controlled by a hydrogen doping density.

10. The solid state optical beam steering device of claim 9 further including:
a first voltage source applied between a first end and a second end of the first resistive sheet for biasing the first resistive sheet in a first direction; and
a second voltage source applied between a first end and a second end of the second sheet-for biasing the second sheet in a second direction;
wherein the first end and the second end of the first transparent resistive sheet are opposite each other; and
wherein the first end and the second end of the second transparent resistive sheet are opposite each other.

11. The solid state optical beam steering device of claim 10 wherein the second direction is orthogonal to the first direction.

12. The solid state optical beam steering device of claim 10 wherein the first voltage source and the second voltage source are direct current (DC) voltages.

13. The solid state optical beam steering device of claim 10 :
wherein the solid state optical beam steering device further comprises a third voltage source applied between the second end of the first transparent resistive sheet and the second end of the second sheet for adjusting an optical beam phase.

14. The solid state optical beam steering device of claim 9 wherein the solid state body of electro-optical material a rectilinear configuration, or a square configuration.

15. The solid state optical beam steering device of claim 9 further including a first voltage source applied between a first end and a second end of the first resistive sheet for biasing the first resistive sheet in a first direction.

16. A solid state optical beam steering device comprising:
an array of a plurality of optical beam steering elements;
wherein each optical beam steering element comprises:
a solid state body of electro-optical material wherein the solid state body of electro-optical material comprises any material of a class of hydrogen-doped phase-change metal oxide and wherein the solid state body has a first face and a second face opposite the first face;
a first transparent resistive sheet on a first face of the solid state body of electro-optical material, wherein the first transparent resistive sheet extends along the first face; and
a second transparent resistive sheet on a second face of the solid state body of electro-optical material, wherein the second transparent resistive sheet extends along the second face,

wherein an end of the first transparent resistive sheet and an end of the second transparent resistive are electrically connected to one another;
wherein the electro-optical material comprises NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , GdNiO 3 or any combination of NdNiO 3 , SmNiO 3 , PrNiO 3 , EuNiO 3 , GdNiO 3 , wherein a refractive index of the electro-optical material is configured to be controlled by a hydrogen doping density.

17. The solid state optical beam steering device of claim 16 whe

Assignees

• Hrl Lab Llc

Inventors

• Kremer Richard
• Son Kyung-Ah
• Moon Jeong-Sun
• Quarfoth Ryan

Classifications

• G02F1/292 Primary

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

• G02B27/0087

  Phased arrays · CPC title

• G02F1/0147

  based on thermo-optic effects (G02F1/132 takes precedence) · CPC title

• G02F1/03

  based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect (G02F1/061 takes precedence) · CPC title

• G02F1/0316

  Electrodes · CPC title