Optical splitter chip, optical splitter component, optical splitter apparatus, and optical fiber box

Patent metadata

Field	Value
Publication number	US-11280960-B2
Application number	US-202016808712-A
Country	US
Kind code	B2
Filing date	Mar 4, 2020
Priority date	Mar 4, 2019
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

One example optical splitter chip includes a substrate, where the substrate is configured with an input port, configured to receive first signal light, an uneven optical splitting unit, configured to split the first signal light into at least second signal light and third signal light, where optical power of the second signal light is different from optical power of the third signal light, a first output port, configured to output the second signal light, an even optical splitting unit group, including at least one even optical splitting unit, configured to split the third signal light into at least two channels of equal signal light, where optical power of the at least two channels of equal signal light is the same, and at least two second output ports, which are in a one-to-one correspondence with the at least two channels of equal signal light.

First claim

What is claimed is:

1. An optical splitter chip, comprising a substrate, wherein the substrate is configured with:
an input port, the input port configured to receive first signal light;
an uneven optical splitting unit, the uneven optical splitting unit configured to split the first signal light into at least second signal light and third signal light, wherein optical power of the second signal light is different from optical power of the third signal light;
a first output port, the first output port configured to output the second signal light;
an even optical splitting unit group comprising at least one even optical splitting unit, the even optical splitting unit group configured to split the third signal light into at least two channels of equal signal light, wherein optical power of the at least two channels of equal signal light is the same;
at least two second output ports, which are in a one-to-one correspondence with the at least two channels of equal signal light, wherein each second output port is configured to output corresponding equal signal light;
wherein the uneven optical splitting unit comprises:
an input waveguide, the input waveguide configured to transmit the first signal light received by the input port;
a first output waveguide, the first output waveguide configured to receive the first signal light and output the second signal light to the first output port;
a second output waveguide, the second output waveguide configured to receive the first signal light and output the third signal light to the even optical splitting unit group; wherein the first output waveguide has a width- 3 , the second output waveguide has a width- 4 , and the width- 3 is different from the width- 4 ; and
a tapered waveguide, formed as an isosceles trapezoid, comprising an input end and an output end, wherein the input end is coupled to the input waveguide; the first signal light output from the input waveguide is input to the tapered waveguide from the input end; the first signal light is transmitted to the output end; a width- 1 of the output end is greater than a width- 2 of the input end; and the first output waveguide and the second output waveguide are arranged along a width direction of the tapered waveguide; and

wherein the first output waveguide and the second output waveguide are separately coupled to the output end of the tapered waveguide; and in the width direction of the tapered waveguide, a central axis of the input waveguide is located on a side that is of a central axis of the tapered waveguide and that is close to an output waveguide with a larger width of the first output waveguide and the second output waveguide.

2. The optical splitter chip according to claim 1 , wherein a direction of the central axis of the input waveguide is parallel to a direction of the central axis of the tapered waveguide.

3. The optical splitter chip according to claim 1 , wherein a larger ratio of the width- 3 to the width- 4 indicates a larger optical power ratio of the second signal light to the third signal light.

4. The optical splitter chip according to claim 1 , wherein the input waveguide has a width- 5 , wherein the width- 5 is greater than or equal to the width- 3 , and wherein the width- 5 is greater than or equal to the width- 4 .

5. The optical splitter chip according to claim 1 , wherein the input waveguide has a width- 5 , and wherein the width- 5 is the same as the width- 2 .

6. The optical splitter chip according to claim 1 , wherein the input waveguide, the tapered waveguide, the first output waveguide, and the second output waveguide are planar lightwave circuits (PLCs).

7. The optical splitter chip according to claim 1 , wherein the first output waveguide and the second output waveguide are bent waveguides.

8. The optical splitter chip according to claim 1 , wherein the even optical splitting unit is a planar lightwave circuit (PLC).

9. An optical splitter component, comprising:
an optical splitter chip, comprising a substrate, wherein the substrate is configured with:
an input port, the input port configured to receive first signal light;
an uneven optical splitting unit, the uneven optical splitting unit configured to split the first signal light into at least second signal light and third signal light, wherein optical power of the second signal light is different from optical power of the third signal light;
a first output port, the first output port configured to output the second signal light;
an even optical splitting unit group comprising at least one even optical splitting unit, the even optical splitting unit group configured to split the third signal light into at least two channels of equal signal light, wherein optical power of the at least two channels of equal signal light is the same;
at least two second output ports, which are in a one-to-one correspondence with the at least two channels of equal signal light, wherein each second output port is configured to output corresponding equal signal light;
wherein the uneven optical splitting unit comprises:
an input waveguide, the input waveguide configured to transmit the first signal light received by the input port;
a first output waveguide, the first output waveguide configured to receive the first signal light and output the second signal light to the first output port;
a second output waveguide, the second output waveguide configured to receive the first signal light and output the third signal light to the even optical splitting unit group; wherein the first output waveguide has a width- 3 , the second output waveguide has a width- 4 , and the width- 3 is different from the width- 4 ; and
a tapered waveguide, formed as an isosceles trapezoid, comprising an input end and an output end, wherein the input end is coupled to the input waveguide; the first signal light output from the input waveguide is input to the tapered waveguide from the input end; the first signal light is transmitted to the output end; a width- 1 of the output end is greater than a width- 2 of the input end; and the first output waveguide and the second output waveguide are arranged along a width direction of the tapered waveguide; and

wherein the first output waveguide and the second output waveguide are separately coupled to the output end of the tapered waveguide; and in the width direction of the tapered waveguide, a central axis of the input waveguide is located on a side that is of a central axis of the tapered waveguide and that is close to an output waveguide with a larger width of the first output waveguide and the second output waveguide;

a first optical fiber array, comprising a first fastener and a first optical fiber, wherein a first end of the first optical fiber is fastened in the first fastener, wherein the first fastener is connected to the substrate of the optical splitter chip, and wherein the first end of the first optical fiber is coupled to an input port of the optical splitter chip and is configured to transmit the received first signal light to the input port; and
a second optical fiber array, comprising a second fastener, a second optical fiber, and at least two third optical fibers, wherein a first end of the second optical fiber is fastened in the second fastener, wherein first ends of the third optical fibers are separately fastened in the second fastener, wherein the second fastener is connected to the substrate of the optical splitter chip, wherein the first end of the second optical fiber is coupled to a first output port of the optical splitter chip, and wherein the first ends of the third optical fibers are coupled to the second output ports in a one-to-one correspondence.

10. An optical splitter apparatus, c

Assignees

• Huawei Tech Co Ltd

Inventors

• Qi Biao
• Xiong Wei
• Li sanxing

Classifications

• G02B2006/1215

  Splitter · CPC title

• G02B6/125 Primary

  Bends, branchings or intersections · CPC title

• G02B6/122

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

• G02B6/12004

  Combinations of two or more optical elements · CPC title

• G02B6/12 Primary

  of the integrated circuit kind (electric integrated circuits H10B, H10D84/00 - H10D89/00, H10F19/00, H10F39/00, H10H29/00, H10K19/00, H10K39/00, H10K59/00, H10N19/00, H10N39/00, H10N59/00, H10N69/00, H10N79/00, H10N89/00) · CPC title