Integrated optical coupler

Patent metadata

Field	Value
Publication number	US-12498520-B2
Application number	US-202117559871-A
Country	US
Kind code	B2
Filing date	Dec 22, 2021
Priority date	Dec 22, 2021
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

Embodiments herein relate to systems, apparatuses, or processes directed to an integrated optical coupler that may be used to optically couple a waveguide and a PIC. In embodiments, the integrated optical coupler may include an optical diffraction grating mechanism, an optical lens, and a Faraday rotator. In embodiments, the integrated optical coupler may at least partially within a housing. Other embodiments may be described and/or claimed.

First claim

What is claimed is:

1 . An optical coupler comprising:
an electrical optical (EO) substrate; an optical waveguide within the EO substrate; a transparent grating having a first side opposite a second side, the first side of the transparent grating optically coupled with an edge of the optical waveguide; and a lens optically coupled with the second side of the transparent grating.

2 . The optical coupler of claim 1 , wherein the first side of the transparent grating is physically coupled with the edge of the optical waveguide.

3 . The optical coupler of claim 2 , wherein an optical epoxy physically couples the first side of the transparent grating with the edge of the optical waveguide.

4 . The optical coupler of claim 1 , wherein a width of the edge of the optical waveguide is greater than a width of the optical waveguide at a location away from the edge of the optical waveguide.

5 . The optical coupler of claim 1 , wherein the EO substrate includes a selected one or more of: gallium, phosphorous, arsenic, lead, molybdenum, oxygen, tellurium, titanium, sulfur, strontium, barium, niobium, lithium, tantalum, GaP, GaAs, PbMoO 4 , TeO 2 , Ti 3 AsS 4 , Sr 0.75 Ba 0.25 Nb 2 O 6 , LiNbO 3 , or LiTaO 3 .

6 . The optical coupler of claim 1 , further comprising a Faraday rotator optically coupled with the lens.

7 . The optical coupler of claim 1 , wherein the transparent grating further includes one or more grating widths determined based upon a wavelength of light through the optical waveguide and location of one or more optical inputs of a photonics integrated circuit (PIC).

8 . The optical coupler of claim 7 , wherein the optical coupler and the PIC are physically coupled with another substrate, and wherein the optical coupler is optically coupled with the one or more optical inputs of the PIC.

9 . The optical coupler claim 8 , wherein the other substrate is a glass substrate.

10 . An optical coupler comprising:
an electrical optical (EO) substrate; an optical waveguide within the EO substrate; and a transparent grating, a side of the transparent grating optically coupled with an edge of the optical waveguide, wherein the side of the transparent grating is physically coupled with the edge of the optical waveguide, and wherein an optical epoxy physically couples the side of the transparent grating with the edge of the optical waveguide.

11 . The optical coupler of claim 10 , wherein a width of the edge of the optical waveguide is greater than a width of the optical waveguide at a location away from the edge of the optical waveguide.

12 . The optical coupler of claim 10 wherein the EO substrate includes a selected one or more of: gallium, phosphorous, arsenic, lead, molybdenum, oxygen, tellurium, titanium, sulfur, strontium, barium, niobium, lithium, tantalum, GaP, GaAs, PbMoO 4 , TeO 2 , Ti 3 AsS 4 , Sr 0.75 Ba 0.25 Nb 2 O 6 , LiNbO 3 , or LiTaO 3 .

13 . The optical coupler of claim 10 , wherein the transparent grating further includes one or more grating widths determined based upon a wavelength of light through the optical waveguide and location of one or more optical inputs of a photonics integrated circuit (PIC).

14 . The optical coupler of claim 13 , wherein the optical coupler and the PIC are physically coupled with another substrate, and wherein the optical coupler is optically coupled with the one or more optical inputs of the PIC.

15 . The optical coupler claim 14 , wherein the other substrate is a glass substrate.

16 . An optical coupler comprising:
an electrical optical (EO) substrate; an optical waveguide within the EO substrate; and a transparent grating, a side of the transparent grating optically coupled with an edge of the optical waveguide, wherein a width of the edge of the optical waveguide is greater than a width of the optical waveguide at a location away from the edge of the optical waveguide.

17 . The optical coupler of claim 16 , wherein the EO substrate includes a selected one or more of: gallium, phosphorous, arsenic, lead, molybdenum, oxygen, tellurium, titanium, sulfur, strontium, barium, niobium, lithium, tantalum, GaP, GaAs, PbMoO 4 , TeO 2 , Ti 3 AsS 0 4 , Sr 0.75 Ba 0.25 Nb 2 O 6 , LiNbO 3 , or LiTaO 3 .

18 . The optical coupler of claim 16 , wherein the transparent grating further includes one or more grating widths determined based upon a wavelength of light through the optical waveguide and location of one or more optical inputs of a photonics integrated circuit (PIC).

19 . The optical coupler of claim 18 , wherein the optical coupler and the PIC are physically coupled with another substrate, and wherein the optical coupler is optically coupled with the one or more optical inputs of the PIC.

20 . The optical coupler claim 19 , wherein the other substrate is a glass substrate.

21 . An optical coupler comprising:
an electrical optical (EO) substrate; an optical waveguide within the EO substrate; and a transparent grating, a side of the transparent grating optically coupled with an edge of the optical waveguide, wherein the transparent grating further includes one or more grating widths determined based upon a wavelength of light through the optical waveguide and location of one or more optical inputs of a photonics integrated circuit (PIC).

22 . The optical coupler of claim 21 , wherein the optical coupler and the PIC are physically coupled with another substrate, and wherein the optical coupler is optically coupled with the one or more optical inputs of the PIC.

23 . The optical coupler claim 22 , wherein the other substrate is a glass substrate.

Assignees

• Intel Corp

Inventors

• Tanaka Hiroki
• Marin Brandon C
• Darmawikarta Kristof
• Pietambaram Srinivas V

Classifications

• G02B6/132

  by deposition of thin films · CPC title

• G02B6/1228

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

• G02B6/12004 Primary

  Combinations of two or more optical elements · CPC title

• G02B2006/12142

  Modulator · CPC title

• G02B2006/1204

  Lithium niobate (LiNbO3) · CPC title