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Side-coupled dual-channel optical waveguide transmission system for photonic crystal

A photonic crystal and transmission system technology, applied in the coupling of optical waveguides, light guides, optics, etc., can solve the problems of difficult control of distance parameters between graded optical fibers and photonic crystal devices, the influence of integration, and limitations, and achieve compact structure and high integration. The effect of high degree and simple structure

Inactive Publication Date: 2012-07-18
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The evanescent wave method also faces some problems, such as the processing of a specific graded fiber, the difficulty in controlling the distance parameters between the graded fiber used in the coupling process and the photonic crystal device, and the need for a sophisticated external calibration and adjustment system and an external calibration adjustment system The impact on the integration degree and other issues limit the application of the evanescent wave coupling method

Method used

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  • Side-coupled dual-channel optical waveguide transmission system for photonic crystal
  • Side-coupled dual-channel optical waveguide transmission system for photonic crystal
  • Side-coupled dual-channel optical waveguide transmission system for photonic crystal

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specific Embodiment approach 1

[0018] Specific implementation mode one, combination Figure 1 to Figure 5 In this embodiment, the photonic crystal side-coupled dual-channel optical waveguide transmission system includes a waveguide layer, a low refractive index buried layer 7 and a substrate layer 8. The waveguide layer is located above the low refractive index buried layer 7, and the low refractive index buried layer 7 The lower part is connected to the substrate layer 8; the waveguide layer includes a waveguide first region 1, a defect region, and a waveguide second region 2. The waveguide first region 1 is composed of a plurality of dielectric pillars 9 arranged periodically, the waveguide first region 1 and the waveguide second region A row of defective dielectric pillars 10 is distributed at the junction of 2, and the row of defective dielectric pillars constitutes a defective area. A row of coupling dielectric pillars 12 is distributed on the outermost part of the second waveguide area. This row of coupl...

specific Embodiment approach 2

[0033] Specific implementation mode two, combination Figure 6 to Figure 9 To describe this embodiment, this embodiment is the specific manufacturing process of the photonic crystal side-coupled dual-channel optical waveguide transmission system described in the first embodiment:

[0034] The first step is to prepare the dicing groove required for dicing;

[0035] (A) The substrate silicon 101 is 600 μm thick, on which a 3 μm thick silicon dioxide buried layer 102 is grown (such as Figure 6a (Shown) for cleaning;

[0036] (B) such as Figure 6b As shown, a layer of lanthanum aluminate film 103 is prepared by a sol-gel method on the silicon dioxide buried layer 102;

[0037] (C) such as Figure 6c As shown, a photoresist film 104 with a thickness of 2-3 μm is formed on the lanthanum aluminate film 103;

[0038] (D) Put the completed structure in step (C) into an oven before baking;

[0039] (E) such as Figure 6d As shown, ultraviolet exposure is performed on the photoresist film 104 to ...

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Abstract

A side-coupled dual-channel optical waveguide transmission system for a photonic crystal relates to a microstructural photonic crystal element in the field of optical technology, and solves the problem of large scattering resulting from high roughness of the existing photonic crystal waveguide. An efficient coupling structure for the photonic crystal waveguide and a traditional optical device or an external light source is provided. The system comprises a waveguide layer, a low refractive index buried layer and a substrate layer, wherein the waveguide layer is arranged at the upper part of the low refractive index buried layer, the lower part of the low refractive index buried layer is connected with the substrate layer; a mode that multiple photonic crystal resonant cavities are connected in parallel is adopted, electromagnetic waves are coupled in a photonic crystal waveguide defect area by a coupling area of a waveguide area II, and the coupling efficiency is high; and as the upper parts of the photonic crystal resonant cavities, corresponding to point defects, are distributed with coupling medium columns, the coupling efficiency is further improved. The whole photonic crystal waveguide is integrated on one substrate without external optical elements, so that a photonic crystal waveguide structure is more compact, is smaller in size and is higher in the integration degree.

Description

Technical field [0001] The invention relates to a photonic crystal element with a microstructure in the optical technology field, in particular to a photonic crystal side-coupled dual-channel optical waveguide transmission system. Background technique [0002] Photonic crystals are artificial microstructures formed by substances with different dielectric constants arranged periodically in space. In recent years, optoelectronic functional devices based on photonic crystal materials have received extensive attention. Taking advantage of the photonic band gap and photonic local characteristics of photonic crystals, photonic crystal waveguides, filters, optical switches, couplers and other photonic crystal optoelectronic devices have been seen. The report laid a good foundation for the realization of large-scale optoelectronic integration and all-optical networks in the future. [0003] Photonic crystals are artificial microstructures periodically arranged by media with different refr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/28G02B6/122
Inventor 王维彪梁静秋梁中翥周建伟
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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