Planar optical waveguide structure and coupling structure and coupling method thereof

A planar optical waveguide and coupling structure technology, applied in the field of optical waveguide coupling, can solve the problems of large-scale integration difficulties, high packaging costs, complex processes, etc., to reduce costs, ensure process quality, and shorten light and welding time. Effect

Active Publication Date: 2016-07-13
WUHAN TELECOMM DEVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The current mainstream 40G / 100G optical modules are basically based on free space coupling technology such as prisms, lenses, optical filters, etc., which are characterized by complex processes, active alignment with light, high packaging costs, and large-scale integration is very difficult

Method used

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  • Planar optical waveguide structure and coupling structure and coupling method thereof
  • Planar optical waveguide structure and coupling structure and coupling method thereof
  • Planar optical waveguide structure and coupling structure and coupling method thereof

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Embodiment 1

[0043] Embodiment 1 of the present invention provides a coupling structure based on a planar optical waveguide, the structure includes a single-mode active device and a planar optical waveguide PLC, such as figure 1 As shown, specifically:

[0044] The planar optical waveguide PLC includes a silicon dioxide waveguide for transmitting optical signals, wherein the silicon dioxide waveguide is composed of a coupling section and a conducting section.

[0045] Among them, single-mode active devices include but are not limited to Fabry-Perot lasers (Fabry-Perot, abbreviated as: FP), distributed feedback lasers (Distributed Feedback Lasers, abbreviated as: DFB), electro-absorption modulated lasers (Electlro-absorption Modulated Laser , abbreviated as: EML), based on semiconductor optical amplifier (semiconductor optical amplifier, abbreviated as: SOA) and so on.

[0046] The coupling section is a positive ladder structure or an inverted ladder structure, wherein the surface where th...

Embodiment 2

[0052] Embodiment 1 of the present invention provides a coupling structure based on a planar optical waveguide. Next, a specific description will be given to the planar optical waveguide structure used in Embodiment 1. The planar optical waveguide structure includes a coupling structure for transmitting optical signals. Silica waveguides, such as figure 2 and 3 As shown, specifically:

[0053] The silica waveguide is composed of a coupling section and a conducting section;

[0054] The coupling section is a forward ladder structure or an inverted ladder structure, wherein the surface of the coupling section used for coupling with the single-mode active device is the top of the ladder, and the surface connecting the coupling section and the conductive section is the bottom of the ladder.

[0055] From the perspective of the process complexity of manufacturing the planar optical waveguide structure, the embodiment of the present invention provides a preferred implementation s...

Embodiment 3

[0062] In addition to providing the coupling structure described in Embodiment 1 and the optical planar waveguide structure described in Embodiment 2, the embodiment of the present invention proposes a coupling method based on a planar optical waveguide based on the above structure. The silicon dioxide in the planar optical waveguide A waveguide consists of a coupling segment and a conducting segment, such as Figure 6 As shown, the method includes:

[0063] In step 201, the planar optical waveguide is generated, and the coupling section is a ladder body structure, wherein the width of the ladder top surface W1=2.6 μm, the height of the ladder top surface H1=4.4 μm; the width of the ladder bottom surface W2=3.3 μm, and the ladder bottom surface Height H2 = 4.4 μm; ladder length L = 800 μm.

[0064] Preferably, the PLC waveguide in the embodiment of the present invention is a silicon-based silicon dioxide embedded rectangular waveguide, wherein the core layer of the coupling s...

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Abstract

The invention relates to the technical field of optical waveguide coupling and provides a planar optical waveguide structure and a coupling structure and a coupling method thereof. The planar optical waveguide structure comprises a single-mode active device and a planar optical waveguide, wherein the planar optical waveguide comprises a silicon dioxide waveguide for transmitting optical signals, the silicon dioxide waveguide is composed of a coupling section and a conduction section, the coupling section is of a trapezoidal structure or a reverse trapezoidal structure, the face, coupled with the single-mode active device, of the coupling section is a trapezoid top, and the face, connected with the conduction section, of the coupling section is a trapezoid bottom. A coupling spacing gap is preformed between the single-mode active device and the planar optical waveguide. Passive beam focusing and direct coupling from a laser device to PLC are completed by adopting the planar optical waveguide structure, the structure can be completed by adopting an automatic device, the process quality can be greatly ensured, the time for beam focusing and welding is shortened, and accordingly the purpose of reducing the costs is achieved.

Description

【Technical field】 [0001] The invention relates to the technical field of optical waveguide coupling, in particular to a planar optical waveguide structure and its coupling structure and coupling method. 【Background technique】 [0002] The current mainstream 40G / 100G optical modules are basically based on free-space coupling technologies such as prisms, lenses, and optical filters, which are characterized by complex processes, active alignment with light, high packaging costs, and difficulty in larger-scale integration. [0003] On the other hand, photonic integration technology generally refers to active devices (lasers, detectors, optical amplifiers, optical modulators, etc.) ) integration to realize single-chip multi-functional optical device technology. Photonic integration technology is considered to be a powerful optical module technology in the near future and even in the future, especially in short-distance optical interconnection applications such as data centers. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/42
CPCG02B6/4212G02B6/4296
Inventor 陈奔梁雪瑞朱虎胡百泉张玓刘成刚周日凯付永安孙莉萍马卫东余向红
Owner WUHAN TELECOMM DEVICES
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