Photonic crystal T-shaped waveguide-based horizontal output magneto-optical modulator

A magneto-optical modulator and photonic crystal technology, applied in the coupling of optical waveguides, light guides, optics, etc., can solve the problems of large volume of optical modulators and inability to integrate optical chips, and achieve high light transmission efficiency, small structure volume, The effect of high isolation

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

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

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Embodiment 1

[0070] In this embodiment, the function of the lateral output magneto-optic modulator of the photonic crystal T-shaped waveguide 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 the modulation curve diagram shown in Figure 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 is obtained through simulation calculation; referring to the modulation sensitivity diagram shown in Figure 7(b), the modulator is in a The slope of the modulation curve in the port 3 ...

Embodiment 2

[0072] In this embodiment, the function of the lateral output magneto-optic modulator of the photonic crystal T-shaped waveguide 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 the modulation curve diagram shown in FIG. 8( a ), the modulation curve in which the electric field amplitude of the light wave of the port 3 channel varies with the modulating magnetic field within one period is obtained through simulation calculation. Referring to the modulation sensitivity diagram shown in FIG. 8( b ), it is the slope of the modulation curve in the po...

Embodiment 3

[0074] In this embodiment, the function of the lateral output magneto-optic modulator of the photonic crystal T-shaped waveguide 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. With reference to the modulation curve shown in Figure 9 (a), the modulation curve in which the electric field amplitude of the light wave of the port 3 channel varies with the modulation magnetic field in one cycle is obtained through simulation calculation; with reference to the modulation sensitivity diagram shown in Figure 9 (b), The slope of the modulation curve in the port 3 ...

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Abstract

The invention discloses a photonic crystal T-shaped waveguide-based horizontal 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 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 and are arranged in a horizontal line; 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 (2). According to the invention, the TE carrier optical wave signal modulator can be efficiently realized.

Description

technical field [0001] The present invention relates to a modulator, in particular to a lateral output magneto-optic 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 ...

Claims

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Application Information

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