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Magneto-controlled two-select right-angle output optical switch based on photonic crystal t-type waveguide

A photonic crystal and light output technology, applied in the directions of light guides, optics, optical components, etc., can solve the problems of large volume and cannot be integrated with optical paths, and achieve the effect of small structure, large practical value, and easy integration.

Inactive Publication Date: 2021-02-19
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Magneto-controlled two-select right-angle output optical switch based on photonic crystal t-type waveguide
  • Magneto-controlled two-select right-angle output optical switch based on photonic crystal t-type waveguide
  • Magneto-controlled two-select right-angle output optical switch based on photonic crystal t-type waveguide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 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. The switching contrast in the band-gap optical frequency range is obtained through simulation calculation. It can be seen from Fig. 5(a) that when the normalized optical frequency ωa / 2πc=0.4121, the switching contrast can reach 48dB. The switch isolation diagram in the forbidden band optical frequency range can be seen from Figure 5(b), the port 2 and port 3 isolation can reach 48dB, and its performance has obvious advantages compared with other optical switches. The struct...

Embodiment 2

[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=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. Through simulation calculation, the switch contrast in the forbidden band light wave frequency range is obtained, refer to Figure 6(a), the switch isolation diagram in the forbidden band light wave frequency range, refer to Figure 6(b), this structure has high contrast and high isolation The magnetically controlled two-select-one optical path gating switch realizes the optical switch function.

Embodiment 3

[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=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. The switch contrast in the forbidden band frequency range is obtained through simulation calculation. Referring to Figure 7(a), the switch isolation diagram in the forbidden band frequency range is obtained by Figure 7(a) , 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 light field simulation diagram obtained is as follows Figure 8 shown. It is thus observed tha...

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Abstract

The invention discloses a magnetically controlled two-select right-angle output optical path switch based on a photonic crystal T-shaped waveguide, which includes a photonic crystal T-shaped waveguide with a TE band gap; the optical path switch also includes an input terminal (1), two output end (2, 3), background silicon dielectric column (4), isosceles right triangle defect dielectric column (5) and defect dielectric column (6), the optical path switch also includes an electromagnet (7) providing a bias magnetic field; The left end of the crystal T-shaped waveguide is the input end (1), and the output ends (2, 3) are respectively located at the right end and the upper end of the photonic crystal T-shaped waveguide; the photonic crystal waveguide inputs TE light from the port (1), and the output signal is from the port (2 ) or port (3) output. The invention has the advantages of small structure volume, convenient integration and high efficiency, and can realize the function of magnetically controlling two-selection one-selection optical path switch of TE carrier optical signal.

Description

technical field [0001] The invention relates to a magnetically controlled two-select-one optical path gating switch, in particular to a magnetically controlled two-selection right-angle output optical path gating switch based on photonic crystal technology. 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 which is the gyromagnetic non-reciprocity of electromagnetic waves under a bias magnetic field, making magnetic photonic crystals not only have optical properties, but also have more Large transmission bandwidth and higher propagation efficiency. For tiny devices based on photonic crystals, such as magnetron selective one-of-two optical path ga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/095G02B6/122
CPCG02B6/1225G02F1/095G02B6/122
Inventor 欧阳征标吴昌义金鑫
Owner SHENZHEN UNIV