Dynamic photonic waveguide splitter/coupler

Patent metadata

Field	Value
Publication number	US-10557990-B2
Application number	US-201715822503-A
Country	US
Kind code	B2
Filing date	Nov 27, 2017
Priority date	Nov 27, 2017
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

In one embodiment, an apparatus includes a first channel core in communication with a second channel core and a third channel core of a photonic waveguide, a splitter/coupler module movable relative to the channel cores to dynamically adjust a ratio of optical signals at two of the channel cores of the photonic waveguide, and an actuation device operable to move the splitter/coupler module based on input received during operation of the photonic waveguide.

First claim

What is claimed is:

1. An apparatus comprising:
a first channel core in communication with a second channel core and a third channel core of a photonic waveguide;
a module configured as a splitter or a coupler, wherein the module is positioned within a cavity defined in part by fixed edges of said first, second, and third channel cores, and movable relative to said fixed edges of the channel cores to dynamically adjust a ratio of optical signals at two of the channel cores of the photonic waveguide; and
an actuation device operable to move the module based on input received during operation of the photonic waveguide.

2. The apparatus of claim 1 wherein the actuation device comprises two micro-actuators operable to receive electrical input and provide a linear displacement output to move the module along two axes and provide the optical signal ratio.

3. The apparatus of claim 2 wherein the micro-actuators comprise piezoelectric linear actuators.

4. The apparatus of claim 2 wherein the linear displacement output of the micro-actuators is less than 20 micrometers.

5. The apparatus of claim 1 wherein the module comprises a reflective wedge with an internal trench shaped to receive the actuation device.

6. The apparatus of claim 1 wherein the module comprises a block positioned within an optical pathway between the channel cores and comprising two facets extending generally 45 degrees relative to one another, each of the facets comprising a reflective surface.

7. The apparatus of claim 1 wherein the cavity is formed by said edges of said first, second, and third channel cores and a retaining block in contact with two of said channel cores.

8. The apparatus of claim 7 wherein the retaining block comprises a C-shaped block in contact with two of said channel cores each comprising an angled edge.

9. The apparatus of claim 1 wherein the photonic waveguide is embedded within a photonic chip.

10. The apparatus of claim 1 wherein the photonic waveguide is embedded in a printed circuit board.

11. A method comprising:
receiving an optical signal ratio for a photonic waveguide comprising a plurality of fixed channel cores and a module configured as a splitter or a coupler and dynamically movable relative to the channel cores to dynamically adjust the optical signal ratio at two of the channel cores, wherein the module is movable between a plurality of positions within an optical pathway to vary the optical signal ratio with an optical signal output shared between said two of the channel cores or optical signal inputs received from said two of the channel cores; and
transmitting an electrical signal to an actuation device to move the module based on the received optical signal ratio;
wherein the module is movable during operation of the photonic waveguide to dynamically modify the optical signal ratio.

12. The method of claim 11 wherein receiving the optical signal ratio comprises receiving a programmed optical signal ratio.

13. The method of claim 11 wherein the actuation device comprises two micro-actuators operable to receive electrical input and provide a linear displacement output to move the module along two axes and provide the optical signal ratio.

14. The method of claim 11 wherein the module comprises a reflective wedge with an internal trench shaped to receive the actuation device.

15. The method of claim 11 wherein the module comprises two facets extending generally 45 degrees relative to one another, each of the facets comprising a reflective surface.

16. The method of claim 11 wherein the module is positioned within a cavity formed by said edges of said first, second, and third channel cores and a retaining block in contact with two of said channel cores.

17. The method of claim 11 further comprising receiving a new optical signal ratio and transmitting a signal to the actuation device to move the module and provide the new optical signal ratio.

18. A network device comprising:
an embedded photonic waveguide, the photonic waveguide comprising:
a first channel core in communication with a second channel core and a third channel core;
a module configured as a splitter or a coupler and movable relative to the fixed channel cores to dynamically adjust a ratio of optical signals at two of the channel cores; and
an actuation device operable to move the module based on input received during operation of the photonic waveguide to dynamically modify the optical signal ratio;
wherein the module is movable along two axes to provide the ratio of optical signals between zero percent and one hundred percent.

19. The network device of claim 18 wherein the photonic waveguide is embedded in a photonic chip.

20. The network device of claim 18 wherein the photonic waveguide is embedded in a printed circuit board.

Assignees

• Cisco Tech Inc

Inventors

• Achkir D Brice

Classifications

• G02B2006/1215

  Splitter · CPC title

• G02B6/122 Primary

  Basic optical elements, e.g. light-guiding paths · CPC title

• G02B6/428

  containing printed circuit boards [PCB] · CPC title

• G02B6/2817

  using reflective elements to split or combine optical signals · CPC title

• G02B2006/12147

  Coupler · CPC title