Optical phased arrays including member to correct phase error generated in manufacturing processes and method of correcting phase using the same

Patent metadata

Field	Value
Publication number	US-10989984-B2
Application number	US-202016778852-A
Country	US
Kind code	B2
Filing date	Jan 31, 2020
Priority date	Aug 28, 2019
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

Provided is an optical phased array including a light injector, a first splitter connected to the light injector, a first phase shifter connected to the first splitter, a plurality of waveguides connected to the first splitter, portions of the plurality of waveguides being connected to the first splitter via the first phase shifter, an antenna array connected to the plurality of waveguides, a single mode filter provided in each of the plurality of waveguides, and a first photodetector connected to the first splitter and configured to detect a portion of light radiated onto the antenna array.

First claim

What is claimed is:

1. An optical phased array comprising:
a light injector;
a first splitter connected to the light injector;
a first phase shifter connected to the first splitter;
a plurality of waveguides connected to the first splitter, portions of the plurality of waveguides being connected to the first splitter via the first phase shifter;
an antenna array connected to the plurality of waveguides;
a single mode filter provided in each of the plurality of waveguides; and
a first photodetector connected to the first splitter and configured to detect a portion of light radiated onto the antenna array.

2. The optical phased array of claim 1 , wherein one waveguide and the first photodetector are connected to a first side of the first splitter through which light enters and exits,
wherein two waveguides are connected to a second side of the first splitter and diverge from the first splitter, and
wherein the first phase shifter is provided on one of the two waveguides.

3. The optical phased array of claim 2 , wherein the first photodetector comprises a first light receiving element and a second light receiving element respectively provided on opposite sides of the one waveguide.

4. The optical phased array of claim 1 , wherein the single mode filter is integrated into the each of the plurality of waveguides.

5. The optical phased array of claim 4 , wherein the single mode filter comprises:
a first section having a first width;
a second section having a second width; and
a third section having a third width,
wherein the first width, the second width, and the third width are different from each other.

6. The optical phased array of claim 1 , further comprising:
a plurality of splitters provided between the first splitter and the plurality of waveguides; and
a plurality of photodetectors connected to the plurality of splitters.

7. The optical phased array of claim 6 , wherein one waveguide and a photodetector are connected to a first side of each of the plurality of splitters through which light enters and exits, and
wherein two waveguides are connected to a second side of each of the plurality of splitters and diverge from each of the plurality of splitters.

8. The optical phased array of claim 7 , wherein the photodetector connected to the first side of each of the plurality of splitter comprises a first light receiving element and a second light receiving element respectively provided on opposite sides of the one waveguide.

9. The optical phased array of claim 6 , wherein the plurality of photodetectors are provided at positions configured to receive light deviated from the plurality of waveguides while light radiated to the antenna array passes through the plurality of splitters through the plurality of waveguides.

10. The optical phased array of claim 6 , further comprising a plurality of phase shifters provided between the plurality of splitters.

11. The optical phased array of claim 10 , wherein one waveguide and a photodetector are connected to a first side of each of the plurality of splitters through which light enters and exits, and two waveguides are connected to a second side of each of the plurality of splitters and diverge from each of the plurality of splitters, and
wherein each of the plurality of phase shifters is provided in one of the two waveguides diverging from each of the plurality of splitters.

12. The optical phased array of claim 10 , wherein a number of the plurality of phase shifters is equal to a number of the plurality of splitters, or the number of the plurality of phase shifters is greater than the number of the plurality of splitters provided between the light injector and the antenna array.

13. The optical phased array of claim 12 , wherein, the number of the plurality of phase shifters is greater than the number of the plurality of splitters, and the plurality of phase shifters are provided in each of the plurality of waveguides provided between the first splitter and the antenna array.

14. The optical phased array of claim 10 , further comprising heat shielding elements provided around the first phase shifter and each of the plurality of phase shifters.

15. The optical phased array of claim 6 , wherein one waveguide is connected to a first side of each of the plurality of splitters through which light enters and exits, and two waveguides are connected to a second side of each of the plurality of splitters and diverge from each of the plurality of splitters, and
wherein a tap coupler is provided adjacent to the one waveguide connected to the first side of each of the plurality of splitters.

16. An optical phased array comprising:
a light receiver;
a first splitter connected to the light receiver;
a first phase shifter connected to the first splitter;
a plurality of waveguides connected to the first splitter, portions of the plurality of waveguides being connected to the first splitter via the first phase shifter;
an antenna array connected to the plurality of waveguides; and
a single mode filter provided in each of the plurality of waveguides.

17. The optical phased array of claim 16 , wherein the single mode filter is integrated into each of the plurality of waveguides.

18. The optical phased array of claim 17 , wherein the single mode filter comprises:
a first section having a first width;
a second section having a second width; and
a third section having a third width;
wherein the first width, the second width, and the third width are different from each other.

19. The optical phased array of claim 16 , wherein one waveguide is connected to a first side of the first splitter through which light enters and exits, and two waveguides are connected to a second side of the first splitter and diverge from the first splitter,
wherein the first phase shifter is provided on one of the two waveguides diverging from the first splitter.

20. The optical phased array of claim 16 , further comprising:
a plurality of splitters provided between the first splitter and the plurality of waveguides; and
a plurality of photodetectors connected to the plurality of splitters.

21. The optical phased array of claim 20 , wherein the plurality of photodetectors are provided at positions configured to receive light deviated from a waveguide while light radiated to the antenna array passes through the plurality of splitters through the plurality of waveguides.

22. The optical phased array of claim 20 , wherein one waveguide and a photodetector are connected to a first side of each of the plurality of splitters through which light enters and exits, and two waveguides are connected to a second side of each of the plurality of splitters and diverge from each of the plurality of splitters.

23. The optical phased array of claim 22 , wherein the photodetector connected to the first side of each of the plurality of splitters comprises a first light receiving element and a second light receiving element respectively provided on opposite sides of the one waveguide.

24. The optical phased array of claim 20 , further comprising a plurality of phase shifters provided between the plurality of splitters.

25. The optical phased array of claim 24 , wherein one waveguide and a first photodetector are connected to a first side of each of the plurality of splitters through which light enters and exits, and two waveguides are connected to a second side of each of the plurality of spl

Assignees

• Samsung Electronics Co Ltd

Inventors

• Byun Hyunil
• Hwang Inoh

Classifications

• G01S7/4811

  common to transmitter and receiver · CPC title

• G02F1/025

  in an optical waveguide structure (G02F1/017, {G02F1/2257} take precedence) · CPC title

• G02F1/015

  based on semiconductor elements having potential barriers, e.g. having a PN or PIN junction (G02F1/03 takes precedence) · CPC title

• G02F1/011 Primary

  in optical waveguides, not otherwise provided for in this subclass · CPC title

• G02F1/2955 Primary

  by controlled diffraction or phased-array beam steering (controlled diffraction for optical waveguide switching G02F1/313) · CPC title