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Multi-cavity cascade-connection photon crystal multicenter wave filter

A photonic crystal and multi-channel technology, applied in instruments, light guides, optics, etc., can solve the problems of difficult control of channel performance and high design difficulty

Inactive Publication Date: 2008-08-20
SHENZHEN UNIV +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

People have designed a photonic crystal multi-channel filter based on the Fabry-Perot effect, but its disadvantage is that there will be a large number of useless channels in the area outside the working frequency band; someone has also designed a photonic crystal multi-channel filter based on multiple defects, and multi-channel filters based on complex periodic structures, but these structures have problems such as high design difficulty and difficult control of channel performance

Method used

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  • Multi-cavity cascade-connection photon crystal multicenter wave filter
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  • Multi-cavity cascade-connection photon crystal multicenter wave filter

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Embodiment Construction

[0030] Some examples are given below for the specific implementation of the present invention in conjunction with the accompanying drawings, but the specific implementation is not limited to these examples.

[0031] Referring to Figure 1, the photonic crystal multi-channel filter is composed of multiple photonic crystal single-defect cavities cascaded. Light containing multiple wavelengths is incident on the photonic crystal single-defect cavity cascaded structure in Figure 1, and the number of defect modes appearing in the transmission spectrum is the same as the number of single-defect cavities. For example, cascading three photonic crystal single-defect cavities can realize 3-channel filtering. A specific embodiment is that the high refractive index medium layer is AlAs, the low refractive index medium layer is cryolite, and its refractive index is 2.87 and 1.35 respectively, and the optical thickness is 0.39 μm. In addition, the refractive index of the three defect layers ...

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Abstract

The invention provides a multi-photons crystal imperfect cavity cascaded multi-channel filter, which has the structure as follows. A defect is equipped in the middle of the central symmetrical or non-symmetric periodical photos crystal, that is the photon crystal single defect cavity, many imperfect cavities cascade and form the multi-channel filter. The number of channel is equal to the number of cavity; the intensity of channel is proportional to the number of cavity. The position of channel is mainly determined by the thickness of imperfect layer, the channel range is determined by the periodicity of photon crystal.

Description

(1) Technical field [0001] The invention relates to a one-dimensional photonic crystal multi-channel filter structure formed by cascading multiple photonic crystal single-defect cavities. (2) Background technology [0002] In the modern information society, with the development of technology, the amount of information that needs to be transmitted continues to increase. Modern optical communication devices are developing towards high capacity, large broadband, integration, and miniaturization. The dense wavelength division multiplexing (DWDM) technology Rapid practical application provides an easy-to-implement method for long-distance transmission of high-speed, large-capacity information, and also provides the possibility for the development of all-optical communication networks based on wavelength selection. Optical wavelength division multiplexing (WDM) technology is a technology that can combine (multiplex) optical signals of different wavelengths for transmission, and ca...

Claims

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Application Information

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IPC IPC(8): G02B6/122
Inventor 欧阳征标钟远聪
Owner SHENZHEN UNIV
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