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Waveguide Structures for Optical Coupling

A technology of waveguide structure and optical coupling, applied in the directions of optical waveguide light guide, light guide, optics, etc., can solve the problem that the trident coupler cannot be used for equipment interface, cannot be used as an evanescent coupler, etc., to achieve low coupling loss, manufacturing The effect of low cost and good alignment tolerance

Active Publication Date: 2020-12-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Trident couplers can only be used as edge couplers and not as so-called evanescent couplers, i.e., couplers used to transfer light between different vertically aligned device layers or devices.
In other words, Trident couplers cannot be used for device interfaces obtained using transfer printing techniques

Method used

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  • Waveguide Structures for Optical Coupling
  • Waveguide Structures for Optical Coupling
  • Waveguide Structures for Optical Coupling

Examples

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Embodiment Construction

[0061] figure 1 Shown is a schematic waveguide structure 100 according to an embodiment of the invention. The waveguide structure 100 is suitable for optical coupling, especially for evanescent coupling between different layers of a device or between two coupled devices (as shown schematically). The waveguide structure 100 includes a first waveguide 101 embedded in a first cladding layer 102, and at least two second waveguides 103a, 103b which are vertically separated from the first waveguide 101 and embedded in a second waveguide provided on the first cladding layer 102. In the cladding 104 . The second waveguides 103a, 103b are preferably not vertically separated from each other ( figure 1 The small offset in is just to illustrate the two second waveguides).

[0062] The 'vertical' direction is indicated in the schematic axes (upper left corner) by the axis labeled 'V'. The 'longitudinal' direction is indicated by another axis labeled 'Lg'. The 'Lateral' direction is pe...

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Abstract

The invention provides a waveguide structure (100) for optical coupling. The waveguide structure (100) comprises a first waveguide (101) embedded in a first cladding (102), at least two second waveguides (103a, 103b), the at least two second waveguides (103a, 103b ) vertically separated from said first waveguide (101) and embedded in a second cladding (104) provided on said first cladding (102). Accordingly, said first and second waveguides (101, 103a, 103b) each comprise an at least partially tapered end section in the coupling region (105) of said waveguide structure (100), said first waveguide 101 The end section is tapered relative to the end section of the second waveguide (103a, 103b). Furthermore, said first waveguide (101) is placed laterally, preferably centrally, between said at least two second waveguides (103a, 103b) in said coupling region (105).

Description

[0001] Related Applications Cross Application [0002] This application claims the priority of the earlier application of the European Patent Application No. 16155525.5 filed on February 12, 2016, entitled "WAVEGUIDE STRUCTURE FOR OPRICAL COUPLING", the earlier application The contents are incorporated into this text by reference. technical field [0003] The present invention relates to waveguide structures for optical coupling, and to methods of their manufacture. In particular, waveguide structures can be obtained by transfer from one device to another or to a substrate. The waveguide structure preferably enables vertical optical coupling between two coupling devices with low losses. At the same time, the waveguide structure allows large alignment tolerances between devices. To this end, the waveguide structure employs a waveguide "trident," which includes a first waveguide and two or more second waveguides to transmit light. Background technique [0004] Silicon phot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/13G02B6/122
CPCG02B6/1228G02B2006/12147G02B6/12002G02B6/12004
Inventor 马汀·塔萨特
Owner HUAWEI TECH CO LTD