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Multi-stage two-dimensional photonic crystal beam compression device

A two-dimensional photonic crystal and photonic crystal waveguide technology, applied in the optical field, can solve the problems of limited application, complicated gradient waveguide structure, reduced device integration, etc., and achieve low-loss coupling propagation, high compression ratio, and improved integration. Effect

Inactive Publication Date: 2014-05-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, the introduction of optical devices will complicate the structure of the graded waveguide and reduce the integration of the device
In addition, at the sub-micron scale of photonic crystal devices in the optical communication band, the diffraction effect of geometric optical devices is very obvious, which limits the application of the above two methods

Method used

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  • Multi-stage two-dimensional photonic crystal beam compression device
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  • Multi-stage two-dimensional photonic crystal beam compression device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the three-stage two-dimensional photonic crystal beam reducer of the present invention is composed of a W7-type photonic crystal waveguide 2, a W5-type photonic crystal waveguide 4, a W1-type photonic crystal waveguide 5, and a nanowire waveguide 6 arranged closely in sequence. Among them, the W7-type photonic crystal waveguide 2 and the W5-type photonic crystal waveguide 4 constitute the primary compression part of the beam reducer, the W5-type photonic crystal waveguide 4 and the W1-type photonic crystal waveguide 5 serve as the secondary compression part of the beam reducer, and the third-stage compression The part is composed of W1 type photonic crystal waveguide 5 and nanowire waveguide 6 .

[0029] The electromagnetic wave (1550nm) of the characteristic frequency is incident from the W7-type photonic crystal waveguide 2 on the left side of the beam reducer, through the efficient coupling of W7-type photonic crystal waveguide 2 and W5-typ...

Embodiment 2

[0032] Such as figure 2 As shown, the multi-level two-dimensional photonic crystal beam reducer of the present invention is composed of a W5-type photonic crystal waveguide 4, a W1-type photonic crystal waveguide 5 and a nanowire waveguide 6 arranged closely in sequence.

[0033] The electromagnetic wave (1550nm) of the characteristic frequency is incident from the W5 type photonic crystal waveguide 4 on the left side of the beam reducer, and through the efficient coupling of the W5 type photonic crystal waveguide 4 and the W1 type photonic crystal waveguide 5, due to the size of the light-passing aperture of the W1 type photonic crystal waveguide 5 Smaller than the W5-type photonic crystal waveguide 4, the light beam completes one-stage compression. The light beam in the W1-type photonic crystal waveguide 5 is efficiently coupled by the W1-type photonic crystal waveguide 5 and the nanowire waveguide 6, and exits from the nanowire waveguide 6 with a smaller aperture to comple...

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Abstract

The invention relates to a multi-stage two-dimensional photonic crystal beam compression device, which comprises a plurality of stages of photonic crystal waveguides and a nanowire waveguide. The photonic crystal waveguides on a plurality of stages are sequentially arranged via tight connection with the light transmission width reducing gradually, the photonic crystal waveguide at the last stage is a W1 type photonic crystal waveguide, and the defect area of the W1 type photonic crystal waveguide is connected with the nanowire waveguide; and the whole beam compression device is integrated on a substrate. Electromagnetic waves of characteristic frequency are transmitted from the photonic crystal waveguide on the left with the largest light transmission width, are efficiently coupled by the photonic crystal waveguides on different stages, and are finally coupled by the W1 type photonic crystal waveguide into the nanowire waveguide with a smaller light transmission hole and then out of the nanowire waveguide, and thus the multi-stage beam compression is realized. Light beams can be compressed by the multi-stage compression structure, a higher compression ratio and smaller emergent spots can be achieved, and the coupling efficiency is high. In addition, compared with the gradient waveguide, the size of the device can be reduced greatly, and the integration of the device can be improved.

Description

Technical field: [0001] The invention belongs to the field of optical technology, and relates to a microstructure photonic crystal element, in particular to a multi-level two-dimensional photonic crystal beam reducer. 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. Photonic crystal optoelectronic devices such as photonic crystal waveguides, filters, optical switches, and couplers have been used The report has 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 formed by periodic arrangements of media with different refractive indices. When electromagnetic waves propagate in them due to Bragg scattering, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G02B6/122G02B6/24
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