Photonic crystal triple wavelength division multiplexer based on application of FTTH

A wavelength division multiplexer and photonic crystal technology, applied in the directions of light guides, optics, instruments, etc., can solve problems such as poor practicability, difficulty in making triple wavelength division multiplexers, and inability to apply to fiber-to-the-home access networks. Production, practical effect

Inactive Publication Date: 2011-05-18
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing triple wavelength division multiplexer, which are difficult to manufacture, poor in practicability, and cannot be applied to fiber-to-the-home access networks, the present invent...

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  • Photonic crystal triple wavelength division multiplexer based on application of FTTH
  • Photonic crystal triple wavelength division multiplexer based on application of FTTH
  • Photonic crystal triple wavelength division multiplexer based on application of FTTH

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example

[0029] Example: Triple wavelength division multiplexing device of two-dimensional hexagonal lattice photonic crystal. The two-dimensional photonic crystal is composed of cylinders with air holes arranged in a hexagonal lattice on a high-refractive-index medium plate, and the refractive index of the high-refractive-index medium plate is 3.42. The air medium cylinder radius is 0.33 a ,here a is the lattice constant, equal to 350.517 nm . This photonic crystal only has a TE mode photonic bandgap with the magnetic field direction parallel to the dielectric column, and the normalized frequency range is , here is the wavelength of light in free space. The input waveguide (2) and the first channel (4) are in x The direction is obtained by removing a row of air columns. The folded directional coupler (11) is formed by placing the end of the input waveguide (2) in parallel with the beginning of the first channel (4). The end of the input waveguide (2) is connected to the intac...

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Abstract

The invention relates to a photonic crystal triple wavelength division multiplexer based on the application of FTTH (fiber to the home). The division multiplexer adopts the two-dimensional photonic crystal with hexagonal lattice air holes on a high refractivity flat plate. The photonic crystal triple wavelength division multiplexer contains four photonic crystal line-defect waveguides and two photonic crystal point-defect micro-cavities, wherein the four photonic crystal line-defect waveguides are an input waveguide, a first channel, a second channel and a third channel respectively; the two defect micro-cavities are a downlink micro-cavity with the wavelength of 1490nm and a downlink micro-cavity with the wavelength of 1310nm; the two micro-cavities are placed on both sides of the input waveguide; and the second channel and the third channel are separately connected with the 1310nm of downlink micro-cavity and the 1490nm of downlink micro-cavity, and the tail end of the input waveguide is connected with the first channel through a folding directional coupler. The invention is convenient to prepare, has high practicability and micron dimension and can be applied in the FTTH access network.

Description

technical field [0001] The invention relates to a triple wavelength division multiplexer (Triplexer), which is suitable for future fiber-to-the-home (FTTH) access networks. Background technique [0002] Optical triple wavelength division multiplexers are very important devices for fiber-to-the-home applications in passive optical networks. According to the recommendation of ITU G.983, it can filter out three set wavelengths, namely 1310nm uplink signal, 1490nm and 1550nm two downlink signals. Currently, planar lightwave loop (PLC) technology is the most promising option for making such low-cost devices and has been developed commercially. Such multiplexers based on arrayed waveguide grating technology have been widely used in coarse wavelength division multiplexing and dense wavelength division multiplexing systems. These technologies have many advantages such as easy integration, high efficiency and reliability. However, these traditional optical triple wavelength divisi...

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Application Information

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IPC IPC(8): G02B6/125G02B6/122G02B6/293
Inventor 任宏亮覃亚丽温浩吴哲夫刘恺
Owner ZHEJIANG UNIV OF TECH
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