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Three-port photonic crystal circulator

A technology of photonic crystal and photonic crystal waveguide, which is applied in the direction of light guide, optics, instrument, etc., can solve the problems of high insertion loss, low isolation, large loss of ferrite column, etc., and achieve signal crosstalk elimination, excellent performance and symmetry high effect

Inactive Publication Date: 2018-10-12
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The invention provides a three-port photonic crystal circulator, which solves the problem of large loss caused by a plurality of ferrite columns, and can overcome the shortcomings of low isolation and high insertion loss of a Y-shaped circulator with an air hole structure

Method used

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0033] Such as figure 1 As shown, the three-port photonic crystal circulator includes a Y-shaped photonic crystal waveguide, and a magneto-optical dielectric column is arranged at the center of the Y-shaped photonic crystal waveguide.

[0034] Photonic crystals are composed of triangular lattice dielectric column arrays arranged in a medium with a refractive index of 1. Here, they are directly arranged in the air. The photonic crystals are in the form of equilateral triangles. The dielectric columns of the triangular lattice dielectric column array are cylinders, and the material is arsenic Gallium has a refractive index of 3.4.

[0035] In the triangular lattice dielectric column array, sever...

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Abstract

The invention discloses a three-port photonic crystal circulator which comprises a Y-shaped photonic crystal waveguide. A magneto-optical dielectric cylinder is arranged at the central position of theY-shaped photonic crystal waveguide. The three-port photonic crystal circulator is compact, low in loss and wide in broadband, can be used for a photonic crystal system complicated in structure and integrated in function, has the immeasurable effect on the aspects of improvement of anti-interference performance and stability of optical paths and the like and is an essential basic element in a photonic crystal large-scale integrated optical path.

Description

technical field [0001] The invention relates to a three-port photonic crystal circulator, which belongs to the technical field of photonic crystal devices and circulators. Background technique [0002] In recent years, photonic crystals have become a hot field for people to study optical devices. Photonic crystal is a new type of artificial material whose dielectric constant or magnetic permeability is arranged periodically or quasi-periodically in space. Its photonic energy band effect can prevent light waves of a certain frequency band from propagating in it. By introducing defects into photonic crystals to guide and control photons, various optical devices with different functions can be obtained, such as photonic crystal lasers, filters, optical switches, and wavelength division multiplexing devices. With the continuous development of technology, people have not only stayed in the research of photonic crystal devices with a single function, but also paid more attention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/095G02B6/122
CPCG02B6/1225G02F1/0955
Inventor 梁吴艳陈德媛谷云兵夏雨陈兵
Owner NANJING UNIV OF POSTS & TELECOMM
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