Photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator

A magneto-optical modulator and photonic crystal technology, which is applied in the coupling of optical waveguides, light guides, instruments, etc., can solve the problems of inability to integrate optical chips and large volume of optical modulators, and achieve small structural volume, high optical transmission efficiency, The effect of fast time response

Inactive Publication Date: 2016-05-25
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the electro-optic coefficient of the electro-optic crystal, it is necessary to use an electro-optic crystal with a relatively long geometric size, which makes the optical modulator larger in size and can only be used in traditional optical devices and cannot be integrated into an optical chip.

Method used

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  • Photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator
  • Photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator
  • Photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator

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Embodiment 1

[0069] In this embodiment, the function of a right-angle output magneto-optical modulator of photonic crystal T-shaped waveguides with different wavelengths can be realized by changing the lattice constant in equal proportions without considering the dispersion or the dispersion of the material changes very little. Let parameter a=6.1772×10 -3 [m],d 2 =0.3a,d 3 =0.2217a,d 5 =1.2997a, Ms=2.39×10 5 [A / m], H 0 =4.79925×10 5 [A / m], H 1 = 225 [A / m]. The normalized light wave frequency ωa / 2πc=0.4121, and other parameters remain unchanged, so that it corresponds to the light wave carrier of 20 GHz. Referring to FIG. 7( a ), the modulation curve of the electric field amplitude of the light wave of the port 3 channel changing with the modulating magnetic field within one period is obtained through simulation calculation, that is, the modulation curve diagram. Referring to FIG. 7( b ), the slope of the modulation curve in the port 3 channel within one cycle, that is, the modulat...

Embodiment 2

[0071] In this embodiment, the function of a right-angle output magneto-optical modulator of photonic crystal T-shaped waveguides with different wavelengths can be realized by changing the lattice constant in equal proportions without considering the dispersion or the dispersion of the material changes very little. Let parameter a=4.1181×10 -3 [m],d 2 =0.3a,d 3 =0.2217a,d 5 =1.2997a, Ms=2.39×10 5 [A / m], H 0 =7.5696×10 5 [A / m], H 1 = 135 [A / m]. The normalized light wave frequency ωa / 2πc=0.4121, and other parameters remain unchanged, so that it corresponds to the light wave carrier of 30 GHz. Referring to FIG. 8( a ), the modulation curve of the electric field amplitude of the light wave of the port 3 channel changing with the modulating magnetic field within one period is obtained through simulation calculation, that is, the modulation curve diagram. Referring to FIG. 8( b ), the slope of the modulation curve in the port 3 channel within one cycle, that is, the modulati...

Embodiment 3

[0073] In this embodiment, the function of the right-angle output magneto-optic modulator of photonic crystal T-shaped waveguides with different wavelengths can be realized by changing the lattice constant in equal proportions without considering the dispersion or the dispersion of the material changes very little. Let parameter a=3.0886×10 -3 [m],d 2 =0.3a,d 3 =0.2217a,d 5 =1.2997a, Ms=2.39×10 5 [A / m], H 0 =10.38505×10 5 [A / m], H 1 = 135 [A / m]. The normalized light wave frequency ωa / 2πc=0.4121, and other parameters remain unchanged, so that it corresponds to the light wave carrier of 40 GHz. Referring to FIG. 9( a ), the modulation curve of the electric field amplitude of the light wave of the port 3 channel changing with the modulating magnetic field within one period is obtained through simulation calculation, that is, the modulation curve diagram. Referring to FIG. 9( b ), the slope of the modulation curve in the port 3 channel within one cycle, that is, the modula...

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Abstract

The invention discloses a photonic crystal T-shaped waveguide-based right-angle output magneto-optical modulator which comprises a photonic crystal T-shaped waveguide with a TE forbidden band. The modulator 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), an electromagnet (7) for supplying an offset magnetic field, a modulation power supply (9) and a modulating signal (10), 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; the defect dielectric cylinder (6) is located at a central interaction of the T-shaped waveguide; four isosceles right triangle defect dielectric cylinders (5) are respectively located at the four corners of the 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 (3). The invention provides a right-angle output magneto-optical modulator capable of efficiently realizing the photonic crystal T-shaped waveguide.

Description

technical field [0001] The invention relates to a modulator, in particular to a right-angle output magneto-optical modulator based on a photonic crystal T-shaped waveguide. Background technique [0002] Traditional optical modulators generally utilize the electro-optic effect of crystals to modulate light, requiring a microwave modulation signal, an electro-optic crystal, and an interference structure, such as a Mach-Zehnder interference structure. Due to the limitation of the electro-optic coefficient of the electro-optic crystal, it is necessary to use an electro-optic crystal with a relatively long geometric size, which makes the optical modulator larger in size and can only be used in traditional optical devices and cannot be integrated into an optical chip. The optical modulator is a key device used to control the light intensity in the process of light emission, transmission and reception of the overall optical communication, and it is also one of the most important in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/095G02B6/122
CPCG02B6/1225G02F1/095G02F2202/32G02F1/0151G02B6/122G02B6/26
Inventor 欧阳征标吴昌义金鑫
Owner SHENZHEN UNIV
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