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Polarization insensitive directional coupler

A directional coupler, vertical technology, applied in instrument, optical waveguide light guide, optics, etc., can solve the problems of large footprint, polarization sensitivity, etc.

Pending Publication Date: 2022-04-22
GLOBALFOUNDRIES U S INC MALTA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional directional couplers have larger footprints because larger coupling lengths are required to compensate for insufficient coupling strength between waveguide cores
Alternatively, the split provided by the directional coupler may be polarization sensitive

Method used

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  • Polarization insensitive directional coupler
  • Polarization insensitive directional coupler
  • Polarization insensitive directional coupler

Examples

Experimental program
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Embodiment Construction

[0052] refer to figure 1 , figure 2 , Figure 2A , Figure 2B , according to an embodiment of the present invention, a structure 10 for a directional coupler includes a waveguide core 12 and a waveguide core 14 on different portions of a dielectric layer 16 . The structure 10 has a coupling region 18 in which the portion 20 of the waveguide core 12 extends longitudinally along the longitudinal axis 13 and the portion 21 of the waveguide core 14 extends longitudinally along the longitudinal axis 15 . The portion 20 of the waveguide core 12 may be symmetric with respect to the longitudinal axis 13 and the portion 21 of the waveguide core 14 may be symmetric with respect to the longitudinal axis 15 . The portion 20 of the waveguide core 12 and the portion 21 of the waveguide core 14 are positioned adjacent to each other in the coupling region 18 . The longitudinal axis 13 of the portion 20 of the waveguide core 14 in the coupling region 18 may be disposed parallel to the lon...

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PUM

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Abstract

The invention relates to a polarization insensitive directional coupler. A structure of a directional coupler and a method of manufacturing a structure of a directional coupler are provided. The first waveguide core is provided with a first part, the second waveguide core is provided with a second part transversely adjacent to the first part, and the third waveguide core is provided with a first cone, a second cone and a third part longitudinally located between the first cone and the second cone. The fourth waveguide core has a first cone, a second cone, and a fourth portion longitudinally located between the first cone and the second cone. The fourth portion laterally adjoins the third portion, and the third portion and the fourth portion are located above or below the first portion and the second portion.

Description

technical field [0001] The present invention relates to photonics chips, and more particularly, to structures of directional couplers and methods of fabricating the structures of directional couplers. Background technique [0002] Optoelectronic chips are used in many applications and systems, including but not limited to data communication systems and data computing systems. Optoelectronic chips integrate optical components (such as waveguides, optical switches, and directional couplers) and electronic components (such as field-effect transistors) into a unified platform. Among other factors, layout area, cost, and operational overhead can be reduced by integrating both types of components on the same chip. [0003] Directional couplers are used on optoelectronic chips to split the propagating optical signal between different waveguide cores. A directional coupler includes sections of a waveguide core routed at reduced lateral spacing selected to facilitate optical coupli...

Claims

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Application Information

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IPC IPC(8): G02B6/10G02B6/12
CPCG02B6/10G02B6/12G02B2006/12147G02B2006/12083G02B6/125G02B6/1228G02B6/2852G02B6/2843
Inventor 卞宇生
Owner GLOBALFOUNDRIES U S INC MALTA