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Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch

A technology of photonic crystal and optical path switch, which is applied in the field of horizontal output magnetically controlled two-to-one optical path gating switch, which can solve the problems of large size and inability to integrate optical paths, and achieve small structure size, wide operating wavelength range, and switching time response fast effect

Inactive Publication Date: 2016-05-25
欧阳征标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional magnetically controlled two-select-one optical path gating switch applies the principle of geometric optics, so it is relatively large in size and cannot be used in optical path integration

Method used

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  • Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch
  • Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch
  • Photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch

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Experimental program
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Effect test

Embodiment 1

[0074] In this embodiment, without considering the dispersion or the dispersion of the material changes very little, by changing the lattice constant in equal proportions, the function of selecting one of the two magnetically controlled optical paths of different wavelengths can be realized. Let parameter a=6.1772×10 -3 [m],d 2 =0.3a,d 3 =0.2817a,d 5 =1.2997a, μ=9.6125, p=0.7792, normalized light wave frequency ωa / 2πc=0.4121, other parameters remain unchanged, so that it corresponds to 20GHz light wave. Referring to Figure 5(a), the switch contrast diagram in the band-gap light wave frequency range is obtained through simulation calculations, referring to Figure 5(b), the switch isolation diagram in the band-gap light wave frequency range, the structure has high contrast, high The magnetically controlled two-select-one optical path gating switch with isolation degree realizes the optical switch function.

Embodiment 2

[0076] In this embodiment, without considering the dispersion or the dispersion of the material changes very little, by changing the lattice constant in equal proportions, the function of selecting one of the two magnetically controlled optical paths of different wavelengths can be realized. Let parameter a=4.1181×10 -3 [m],d 2 =0.3a,d 3 =0.2817a,d 5 =1.2997a, μ=9.6125, p=0.7792, normalized light wave frequency ωa / 2πc=0.4121, other parameters remain unchanged, so that it corresponds to 30GHz light wave. Referring to Figure 6(a), the switch contrast in the forbidden band light frequency range is obtained through simulation calculation; referring to Figure 6(b), the switch isolation in the forbidden band light frequency range, the structure has high contrast and high isolation The magnetically controlled two-select-one optical path gating switch realizes the optical switch function.

Embodiment 3

[0078] In this embodiment, without considering the dispersion or the dispersion of the material changes very little, by changing the lattice constant in equal proportions, the function of selecting one of the two magnetically controlled optical paths of different wavelengths can be realized. Let parameter a=3.0886×10 -3 [m],d 2 =0.3a,d 3 =0.2817a,d 5 =1.2997a, μ=9.6125, p=0.7792, normalized light wave frequency ωa / 2πc=0.4121, other parameters remain unchanged, so that it corresponds to 40GHz light wave. Referring to Fig. 7(a), the switch contrast in the forbidden band frequency range is obtained through simulation calculation; referring to Fig. 7(b), the switch isolation diagram in the forbidden band frequency range. From Fig. 7(a) and Fig. 7(b), it can be seen that when the normalized light wave frequency ωa / 2πc=0.4121, the calculation is performed by the finite element software COMSOL, and the obtained light field simulation diagram is as follows Figure 8 shown. It can...

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Abstract

The invention discloses a photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch which comprises a photonic crystal T-shaped waveguide with a TE forbidden band. The light path switch further comprises an input end (1), two output ends (2, 3), a background silicon dielectric cylinder (4), isosceles right triangle defect dielectric cylinders (5), a defect dielectric cylinder (6) and an electromagnet (7) for supplying offset magnetic field, wherein the input end (1) is arranged at the left end of the photonic crystal T-shaped waveguide; the output ends (2, 3) are respectively located at the right end and upper end of the photonic crystal T-shaped waveguide and are arranged in a horizontal line; the defect dielectric cylinder (6) is located at a central interaction of the T-shaped waveguide; the photonic crystal T-shaped waveguide is used for inputting the TE carrier light through the port (1) and then outputting the amplitude modulating light from the port (2) or the port (3). The photonic crystal T-shaped waveguide-based horizontal output magnetic control alternative light path switch is small in structure volume, is convenient in integration and is capable of efficiently realizing the function of alternative light path switch.

Description

technical field [0001] The invention relates to a magnetically controlled two-to-one optical path gating switch, in particular to a lateral output magnetically controlled two-to-one optical path gating switch based on a photonic crystal T-shaped waveguide. Background technique [0002] Traditional magnetically controlled two-to-one optical path gating switches apply the principle of geometric optics, so they are relatively large in size and cannot be used in optical path integration. The combination of magneto-optical materials and new photonic crystals has led to the proposal of many photonic devices. The most important property of them is the gyromagnetic non-reciprocity of electromagnetic waves under the bias magnetic field, so that the magnetic photonic crystals not only have optical properties, but also have larger transmission bandwidth and higher transmission efficiency. For tiny devices based on photonic crystals, such as magnetron selective one-of-two optical path ...

Claims

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Application Information

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IPC IPC(8): G02F1/095G02B6/122G02B6/125
CPCG02B6/1225G02B6/125G02F1/095G02F2202/32G02F1/0151G02B6/122
Inventor 欧阳征标吴昌义金鑫
Owner 欧阳征标
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