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Leakage-free magneto-optic material gap waveguide magnetic surface fast wave photodiode

A magneto-optical material and photodiode technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of inappropriate Faraday isolator, complex device structure, polarization angle loss, etc., and achieve simple structure, small size, and easy integration. Effect

Inactive Publication Date: 2016-12-07
欧阳征标
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional Faraday isolator is composed of a polarizer, a Faraday rotator and an analyzer. This kind of device has a complex structure and is usually applied in a free-space optical system.
For integrated optical circuits, integrated optical devices such as optical fibers or waveguides are non-polarization maintaining systems, which will cause loss of polarization angle, so Faraday isolators are not suitable

Method used

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  • Leakage-free magneto-optic material gap waveguide magnetic surface fast wave photodiode
  • Leakage-free magneto-optic material gap waveguide magnetic surface fast wave photodiode
  • Leakage-free magneto-optic material gap waveguide magnetic surface fast wave photodiode

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Effect test

Embodiment 1

[0045] refer to figure 1 , the magnetic surface fast wave photodiode is composed of a magneto-optical material gap waveguide, and the dielectric layer 5 is air (n 0 =1), its thickness w=5mm. In the working frequency band, the light wave input from port 1 will generate magnetic surface waves inside the device, and then output from port 2 through the device; while the light wave input from port 2 will be blocked by the device and cannot be output from port 1. refer to image 3 , The operating frequency range of the photodiode and the isolator with the straight waveguide structure is 5.02GHz~7.36GHz. In the operating frequency range, considering the material loss, the photodiode and isolator can achieve a maximum forward and reverse transmission isolation of 32.8dB, and a forward transmission insertion loss of 0.00369dB.

Embodiment 2

[0047] refer to figure 1 , the magnetic surface fast wave photodiode is composed of a magneto-optical material gap waveguide, and the dielectric layer 5 is air (n 0 =1), its thickness w=7mm. In the working frequency band, the light wave input from port 1 will generate magnetic surface waves inside the device, and then output from port 2 through the device; while the light wave input from port 2 will be blocked by the device and cannot be output from port 1. refer to Figure 4 , The operating frequency range of the photodiode and the isolator with the straight waveguide structure is 5.00GHz~7.36GHz. In the operating frequency range, considering the material loss, the photodiode and isolator can achieve a maximum forward and reverse transmission isolation of 31.7dB, and a forward transmission insertion loss of 0.00295dB.

Embodiment 3

[0049] refer to figure 1 , the magnetic surface fast wave photodiode is composed of a magneto-optical material gap waveguide, and the dielectric layer 5 is glass (n 0 =1.5), its thickness w=5mm. In the working frequency band, the light wave input from port 1 will generate magnetic surface waves inside the device, and then output from port 2 through the device; while the light wave input from port 2 will be blocked by the device and cannot be output from port 1. refer to Figure 5 , The operating frequency range of the photodiode and the isolator with the straight waveguide structure is 4.94GHz~7.78GHz. In the operating frequency range, considering the material loss, the photodiode and isolator can achieve a maximum forward and reverse transmission isolation of 33.0dB, and a forward transmission insertion loss of 0.00217dB.

[0050] Depend on Figure 4 and Figure 5 The transmission efficiency curve of the magnetic surface fast wave photodiode of the magneto-optical materi...

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Abstract

The invention discloses a leakage-free magneto-optic material gap waveguide magnetic surface wave photodiode. The photodiode comprises a light input port, a light output port, two magneto-optic material layers, a dielectric layer, four wave absorption layers and two bias static magnetic fields. A photodiode and isolator is composed of the two magneto-optic material layers and the dielectric layer. The light input port is formed in the left end of the photodiode and isolator, the light output port is formed in the right end of the photodiode and isolator, the dielectric layer is arranged in the gap between the two magneto-optic material layers, magnetic surface fast waves are arranged on the surfaces of the magneto-optic material layers and the surface of the dielectric layer, the two magneto-optic material layers are each provided with the bias magnetic fields with opposite directions, and the magnetic surface fast wave photodiode is composed of magneto-optic material gap waveguide. The photodiode is simple in structure, convenient to implement, high in light transmission efficiency, small in size, convenient to integrate and suitable for being applied to large-scale light path integration, and has wide application prospects.

Description

technical field [0001] The invention relates to a magneto-optical material, a surface wave and a photodiode, in particular to a non-leakage magneto-optic material gap waveguide magnetic surface fast wave photodiode. Background technique [0002] Photodiodes and isolators are optical devices that allow light to travel in only one direction and should be used to prevent unwanted light feedback. The main element of conventional photodiodes and isolators is the Faraday rotator, which uses the Faraday effect (magneto-optical effect) as its operating principle. The traditional Faraday isolator is composed of a polarizer, a Faraday rotator and an analyzer. This kind of device has a complex structure and is usually applied in a free-space optical system. For integrated optical circuits, integrated optical devices such as optical fibers or waveguides are non-polarization maintaining systems, which will cause loss of polarization angle, so Faraday isolators are not suitable. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/095G02F1/09
CPCG02F1/09G02F1/095G02F1/093G02F1/0955
Inventor 欧阳征标郑耀贤
Owner 欧阳征标
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